Motocross spring rate calculator 6 kg/mm: 600 lb/in: 10. com/100. RSV4 You can calculate the rear shock spring rate using the same formula as for the front spring rate: Shock Spring Rate = Wheel Rate / (Motion Ratio^2). You can measure the rate of a Spring rates are usually marked on the spring itself, like “8K” for an 8,000 pounds per inch rate. 007 to . 8 to 15. How much spring rate do I need? The required spring rate depends on Motorcycle Fork Spring Rate Calculator. I used it for my shock and forks and i like it. 7 kg/mm: 550 lb/in: 9. The "Rider's weight" is supposed without racegear. Use this spring rate estimator to gain an understanding of what spring rate your vintage or classic motorcycle needs. I've checked out the Race-Tech spring rate calculator, as well as the on on MX-Tech's website and they Importance of Calculating Motorcycle Spring Rate. The setup I am using in the calc is standard stiffness(not leaning soft I am using Race Tech's spring rate calculator and putting the front and rear spring rate into an excel sheet. How do I choose a The stock front fork springs on my 450RX are 0. The Fork Spring Rate Calculator is a tool designed for mechanics, engineers, and motorcycle enthusiasts to determine the stiffness of a motorcycle's front suspension. Century Spring's Compression Spring Calculator was created to make spring design faster and easier. Our free try moto pro suspensions spring calculator. Our springs are Spring rate Lb/in: Spring Rate kg/mm: < < Number of Active coils : Outside Diameter: inches : Wire Diameter : inches: Spring rate Lb/in: Spring Rate kg/mm: A Spring rate is the number of kg or Newton needed to move the spring by 1 mm (or inch if you use lb rating). 0kg Calculators Spring Rate Calculator Spring Rate Conversion Calculator. 5 kg/mm: 650 lb/in: 11. We use cookies to ensure that we give you the best experience on our website. 50 N/mm per kg of rider weight. Like Keefer also says, "you're only as good as what you Shock absorbing spring ; Merk Type 30-35kg 35-40kg 40-45kg 45-50kg 45-55kg 50-55kg 55-60kg 55-65kg Rider Weight Spring Rate Calculator; Motocross Fork Spring Rate Calculator; Dirt Bike Fork Spring Rate Calculator; KTM Spring Rate Calculator; Race Tech Shock Spring Rate Kawasaki lists the spring rates in Newton Meters and stock is a 54Nm. 3 is a half rate difference. Our springs comes in a few different colors, with the typical and well recognized Öhlins yellow the most common. Save Hi all, I'm using the Racetech site to check the required fork/shock spring rates for my 03 CR125. Here are some pre worked out spring rates for the rear shock for road Springs are rated in a very simple formula: Kg/mm in the case of MX. It’s based on variables like rider weight, bike weight, front-end weight bias, and A typical motocross fork spring rate falls around 0. But the actual spring -motocross-arenacross-supercross what do i want to use? I would assume supercross because I want a stiffer spring rate for the motard. Design of a cold coiled helical spring made from rectangular section wire subjected to a static or infrequently varying load. 0 / Shock: 47-140-40. A compression spring is required to meet a I mostly MX my ‘22 KTM 300XC. 0, but it's variable rate so I think that (variable/not) affects what The calculation of a torsional spring requires a bit more of information like wire diameter, outer diameter, total coils, and leg lengths 1 and 2 to calculate spring rate per degree, spring rate Preload Precautionary: Preload adjusters apply about 1 mm or . By taking essential factors like applied force, spring SUSPENSION TOOLS SPRING RATECALCULATOR Use our Spring Rate Calculator Tool to convert spring rates to different measurements. It indicates how much force is required to compress the spring by a certain amount. idevaffiliate. So an example would be if a 175lb rider on a 250F uses . Toggle menu. If you want to know specifically which type of energy, check the elastic potential energy calculator. Now, we can calculate the spring rate (k) using the following formula: k = Gd^4 ÷ (8D^3 * n) k: Spring Rate; G: Shear Modulus; d: Wire Diameter; D: Mean Diameter; n : trending. It's easy to use with accurate measurements. This rate How do you calculate coil spring rate? To calculate the coil spring rate, you can use the formula F = kx, where F is the force applied to the spring, k is the spring rate, and x is And those spring rate calculators have to be looked at with caution. 2 mm/N. It says the stock fork I always try to target 25-35 mm of free sag when I have adjusted the back shock for 100mm of race sag. How do you calculate spring rate? To calculate the spring rate, we can use the This Spring Rate Calculator will help you to find an approximate spring rate for your coil-over application. Aggressive riding. The spring rate, often represented by the spring constant (k), measures the stiffness of the compression spring. They The motocross fork spring rate calculator is an invaluable tool for every motocross rider. 0 Our springs are developed specifically for Öhlins shocks and and a large number of spring rates are available. Calculate the correct spring rate based on your weight, riding style, bike and usage. 0kg, 455mm springs for the WP mxma 4800 fork, but received 485mm ones. The Caliper Store — Aprilia —— RSV4. 4 kg/mm (5. Sport gives many advantages to the person, and for motocross enthusiasts, this includes both physical I can’t comment on YZ250F spring rates even thought I have a 2014 gathering dust in the garage. It’s typically measured in kilograms (kg). if you're riding enduro stuff, you're probably a . [Reply] 1 3. 2 spring (which I now have) but when I go to set my sag the spring is completely loose and still only at 98 mm sag. CL MotoTech your bike’s weight, and pick a spring from the drop down. 4 and 5. Average leverage ratio - this is suitable for bikes with a linear leverage curve. 0 turns on the preload adjuster, to avoid Example B. Enter your bike, weight, skill level and theyll tell you. Consult a spring manufacturer or engineer for precise 5. What happens if you stretch a spring too far? Stretching a spring too far can A spring is a mechanical device that stores energy while deforming its shape when a force or torque is applied. For each measurement of weight, the spring will compress accordingly. To calculate the spring rate necessary to meet your working loads, simply divide the load applied to the spring by the expected travel or compression distance. Example. However, this can vary depending on the Vehicle Mass indicates the entire mass of the vehicle. The Tender Spring should have the same or lower spring rate and will most likely be shorter than the Main Spring. Lb/in to kg/mm. A spring with a spring rate of 350 is easier to compress than one with a In our spring rate calculator, however, we will focus on another way of finding the spring rate using only its extensive and intensive properties. Most of the spring suppliers seem to offer DR350 rear springs in the range of 7. I have used both of these “spring rate calculators” as a general guide Motorcycle Spring Rate Calculator A Better Rider Experience race parts giant bird born in swinley built uk s4 rear apps google play find wp pds exc lainer 24 no correct easy fast motocross offroad road adv ohlins 1 by TECH TIP ALL ABOUT SPRING RATES Learn why choosing proper spring rates is important, and how to find what rate is right for you! Use a spring calculator: A spring calculator is a software tool that can be used to calculate the spring rate of a spring. I'm at 235 pound and it's calling for 6. 0 kg/mm. More than likely you are taking your first Motorcycle Spring Rate Calculator Motorcycle Spring Rate Calculator Rider Weight (lbs): Sag Percentage (%): Calculate FAQs GEGCalculatorsGEG Calculators is a 1 Calculation Formulas for Flat Springs by Shapes ・1-1 Cantilever Springs with Rectangular Cross-section. According to Rocky Mtns website, 0. I'm 145lbs without gear . A Dual Rate spring configuration Support us by grabbing your parts and accessories from AOMC. It considers variables like rider weight, bike weight, static sag, and suspension travel to provide CALL TOLL-FREE (866) 799-9417. The dirt bike suspension calculator is a great tool to help you find the perfect balance between comfort and performance. Good luck creating a fixture to do this and obtaining very This useful calculator calculates the rate of a spring from the spring material, number of coils, wire diameter and outside diameter of a compression spring. Production motocross bikes are set up during development I have an '05 YZ250 and I weigh 213 lbs. For a 197lbs rider, here's what the Race Tech Spring Rate After you put in your info on the racetech website and run the calculator, the page comes back up with spring weight recommendations, but for some reason opens a bit down the page where If you are, however, looking for specific numbers that aren’t on this list, scroll down for our spring rate conversion calculator. 0. They spec super low rates Our spring rate calculator can help you find the appropriate spring dependent on your vehicle and rider weight. If you have not yet finalized your order, we highly recommend that you go to RaceTech's Spring Calculator and input your personal riding data into it to see what springs they recommend for you. If a spring, for example, has a spring rate equal to 5 N/mm, then the compliance would be 0. Sometimes the standard spring rate isn't correct. Have option of cutting them, but need certain info, if shortening What is the spring rate by rider weight? Spring rates can vary widely based on the motorcycle’s design and suspension components. 48kg Fork Springs and Motorcycle Fork Spring Rate Calculator. Needed 4. Unless I'm racing cross country. Motocross is not just a sport; it’s an adventure that offers exceptional benefits. 886 kg/mm front (stock is 1. I put a 5. 2 n/mm, which is a bit too soft for jumps. I ERROR #1: If your Sag number is way too low (with our recommended spring rate and preload) you are probably using the wrong procedure. Compression Springs. Instagram Facebook Youtube. Sometimes kg and N are mixed up. 700 lb/in: 12. I would suggest visiting the Race Tech's website and go to their spring rate calculator for your 2014 YZ85. To determine which spring you need, you'll need to know which spring rate you Spring rates are determined by the weight of the bike and the weight of the rider- NOT THE SKILL LEVEL OF THE RIDER. If the front and rear springs have significantly different rates, it Spring rate calculator . Prepare your vehicle for auto cross events by customizing the spring rates to match the demanding course conditions. There are Sometimes their calculator suggests stock fronts with a 5. 8 stock) for the shock and . About 1,2in longer. Suspension response, I'm using the racetech spring calculator to spring my 2014 rmz 450. 5 Kg rate spring. Default units are shown in inches, etc however SI (metric) Either you trust the ktm or race tech spring calculator. On average, for riders between 150-200 lbs, . The 1st inch of travel as I tried entering my data (mx, 40yo, beginner, 240lbs) into the race tech spring calculator, and I am a bit baffled by its recommendation I have a totally stock 2016 YZ250F CALCULATE YOUR SPRING. calculator or brush up on your long division The first thing we need to do is determine the active spring rate that we have. For your weight on that bike, the suggested rate spring is 5. I Step three will give you all the answers you need like spring rate of load per inch of travel, maximum travel considering solid height, and maximum load considering solid height. Formula: The formula for calculating the fork spring rate is as follows: Example Solve: Unsprung weight is the vehicle weight that is not supported by the springs. At least one spring This calculator computes all parameters (spring rate, maximum load, maximum stress, solid height, coil pitch, coil angle, wire length, resonant frequency, shear modulus, and spring mass) related to a compression spring from basic From you experience how accurate is the race tech websites spring rate calculator? Full story is when I bought my 06 YZ450 a few years ago I was right around 250lbs How to Calculate Spring Rate. Rider's weight: Fork springs: The spring rate is the amount of force required to compress the spring one inch, and is measured in pounds. Skip to content. Consider a car with a spring rate of 50,000 N/m and a mass of 1500 kg. 625 Inches In Spring Wire Diameter; Up to 2. 2 rear spring on it as per Race Techs spring calculator and when I set my race sag to 95mm I only Spring Rate Calculator (Helical Compression) This tool is designed for reference purposes only in order to help determine an approximate rate of existing unmarked helical round wire Unlike the Race Tech calculator, it also doesn't take into consideration the type of usage, rider's skill level etc. 8 Here is an easier and faster way to calculate your compression spring calculations by using our free online spring calculator; which provides you with a full spring analysis of your spring. Just enter a few of your compression Series and Parallel Spring Rate Calculator Units Blocks shown as light blue are editable Spring 1 rate k 1 = Spring 2 rate k 2 = Spring 3 rate k 3 = Spring 4 rate k 4 = Spring 5 rate Spring 1 Wheel rate is the effective stiffness of the suspension system measured at the wheel center. Harsh Over Small Bumps But Uses Full Travel: Causes Initial spring rate or preload too high, too much low speed The Fork Spring Rate Calculator is a tool designed for mechanics, engineers, and motorcycle enthusiasts to determine the stiffness of a motorcycle's front suspension. Enter in your details into the green cells to get your result. 8 rear if i select different riding style for the same weight of 230lbs so it kinda seems like the same level of mismatch. 29kg / Shock: 5. Technology; Media Center; Warranty Policy; Fiveplus Program; Company; Distributors & Dealers; Technology; Media Center; Warranty Policy; Fiveplus Program; Company; Causes spring rate to low or Initial preload to low Increase spring preload or add more air pressure to air spring type systems. htmlThanks for checking out my video! Please subscribe, lik Suspension Dynamics Calculator. Category Type Range Spring Rate Calculation Interpretation; Automotive: Car Suspension: 100 – 600 lb/in: Force on Spring / Compression Distance: Smooth rides or teeth-chattering commutes. mxa race test: 2025 kawasaki kx250 mxa video: we test the 2025 ktm 350sxf two-stroke tuesday: complete test of the 2001 ktm 125sx step four: how to choose a spring rate based on the static sag number Static sag should be between 30mm and 40mm on big bikes (125, 250 or 450). Join the Winner's Circle; Part Search Application Search With a range of spring rate options available, you can fine One option is to buy one spring that’s above or below your stock rate by one step, and replace only one stock spring (thus the two springs together put you a half step higher (or At MXT we love PDS equipped bikes, however we don’t like the stock bikes straight rate springs. Input Example: Calculating Fork Spring Rate. Enter your specifications below and the calculator will automatically generate your spring design data. Optimal Suspension Setup: Riders can optimize their suspension setup by adjusting the spring rate, which can be calculated. THE CALIPER STORE. This tool is here to help you find a starting point. Spring rates affect the ride height and angle of the bike, no matter For motocross, a typical front fork spring rate can range from 0. Where, Sprung Mass is the front and rear mass of the vehicle from above, with Conclusion. I can comment on big difference spring rates between factory and Calculating the compression spring rate involves dividing the load (20 pounds) by the travel (2 inches), yielding a rate of 10 pounds of force per inch. Whether you’re just getting started in the world of competitive motocross racing or you’ve been riding for years, you need gear! Jan 28, 2015. If you have more than To calculate coil springs, you need to consider factors like spring rate, wire diameter, coil diameter, and free length. The equations are based on standard beam formulas where the Definition: Spring rate, also known as spring constant, is the constant amount of force or spring rate of force it takes an extension or compression spring to travel an inch of distance or, in the metric system of measurement, a millimeter of Out doors motocross. I weigh about 200 lb in gear and still ride (rookie rider) stock spring at 4. Standard: Fork: 26-350-2. OK, here is the motherload. Free to The motorcycle rear shock spring weight typically ranges from 4 to 7 kilograms (8. We cannot promise you accurate results Where would I find the color code for the stock spring? Between the 3 web sites calculator average, pointed me to a good start on choose the springs. Yamaha 85 YZ 2016-2024 (large wheels) Standard: Fork: 0. This is a web-based version (slightly simplified) of the Excel spreadsheet I designed and used to work out all the various In theory, you can measure the spring rate by applying a known force (weight) and measuring deflection (compression of the spring) and calculating the rate. By using this calculator, you can determine the ideal spring rate for your bike’s front suspension, Spring rate / Rider weight 35 2,8 SX50 2005 -2006 Fork spring Shock spring Standard s pring 26 -350 -2,0 47 -140 -40 Rider weight 15 -25 kg 1,8 35 25 -35 kg STDSTD STD 35 -45 kg 2,2 45 The Importance of Spring Rate Balance. Let’s illustrate how to use the Fork Spring Rate Calculator with a practical example: Suppose you have a motorcycle with a total weight Spring Rate Formula. This tool is an essential resource for anyone Working of Calculator. Then use the The Race Tech Spring Rate Calculator often recommends softish front springs in many applications but For motocross usage, I also think their algorithm favors harder terrain Discovering the spring rate that works for the terrain range and speeds that you ride requires tuning, plenty of seat time and an entire library of spring rates. 4CS Links : 4CS fork kit: 4CS kit install instructions : 4CS kit tools : 4CS fork - fill ctg tube : 4CS fork - setting oil level : 4CS fork - spring preload : 4CS kit explanation : CHASSIS : 01: Chassis response animations Spring Rate Calculator (Helical Compression) This tool is designed for reference purposes only in order to help determine an approximate rate of existing unmarked helical round wire spring rate calculator スプリングレートカリキュレーター サスペンションセッティングはスプリングレートの選択から。 マシン・用途・体重に合わせオススメスプリングレートを手軽に Quickly and accurately convert spring rates between different units with our Spring Rate Conversion Calculator to help you find even more compatible race springs for your application. . I have a 1994 RM125 with stock springs in the front. 039" per turn. The initial spring Basing ReStackor calculations on the application of basic physics makes the calculations equally applicable to tuning of motorcycle suspensions, automotive racing Suspension bottoming Spring rates for lowering springs are though to come by since they are application specific and one might have the right spring rate but wrong ride height or vice versa. The simplest flat spring is a cantilever spring with a rectangular cross This calculator will determine the spring rate constant related to a compression spring from basic geometry and material data input. FF Springs Shock Spring FF Spring Shock Spring Std Sag and spring rates. 2 - As one of the largest spring manufacturers in the Netherlands, we are specialized in developing, producing and testing a unique wide range of springs for Yamaha motorcycles. It gives you a lot of information about your bike, including the spring rate, rebound damping, static sag, and To determine which spring you need, you'll need to know which spring rate you need, and what your shock stroke is. The formula for compression spring rate is as Calculators Spring Rate Calculator Spring Rate Conversion Calculator. I ride motocross mostly on a sand track. There are other variables such as straight rate aftermarket springs vs slight progressive as with most factory springs. Known leverage at sag By adjusting preload, compression, and rebound settings, you can tailor the front and rear spring balance to suit different riding conditions, terrain types, and rider skill levels. The same Race Tech Then at the top of the page there is a link for the spring rate calculator. You'll have to do KTM - Rider Weight / Spring Rates 50SX 2005 - 2006 50SX 2017 - 2018 50SX 2007 - 2011 50SX 2011 50SX 2021 50SX 2012 - 2016. 0 Inches Bar Stock; Round, Rectangular, Square & Special-Section Wire; Standard & Custom Spring Body Shapes Riders of lighter or heavier weight may need to change the stock springs that come on production bikes to different rate springs. KTM Motocross spring rate chart; KTM Motocross spring rate chart. How close is the race tech spring rate calculator in terms of what it says the stock bike comes with. 40kg/4. k = L ÷ T k = 20 ÷ 2 k = 10 lbf/in Spring calculating is not a perfect science Your riding style, the weight of the bike itself (Ex: e-bike), and other variables can influence spring rate. Examples include: Tire/wheel assembly; brake rotors and calipers (or drums and components); wheel bearings; Determine the ideal spring rate for your vehicle with Donerre’s Spring Rate Calculator, designed to deliver precise results for optimal performance. I have read you need to use race tech valving in conjunction with their spring rate. If the spring is not marked as to its real stroke, never use more than 2. The calculators worked for me and many others. Achieving the right spring rate balance is crucial for optimal performance. Some use rider weight Pressure spring-rates need to match stiffer valving used for Supercross and outdoor motocross conditions. Join the Winner's Circle; Vehicle / Spring Search Application Search Moto Springs Get back in control by fine tuning As a tension spring manufacturer, we calculate the spring rate of a tension spring and determine specific parameters similar to the compression springs (the wire diameter, mean coil diameter, Once these values are entered, the calculator will output the recommended spring rate. Summary. Simply put, the motion ratio is not only responsible for speed change, but also force or How accurate is the spring calculator on the race tech website? It says I need a 5. That convets to a 5. It relies on the principle that the frequency of a spring’s oscillation is I have a completely stock 2010 yz450f and am thinking about changing out my springs. Proper rate Pressure Springs provide a consistent feel and smoother To calculate the spring rate you need to achieve a given sag, you can use the below equation. To choose the right spring rate, Below is an interactive calculator to help you choose the right spring rate for you. At a 250lb beginner, I would recommend going up 2-3 spring The Tender Spring is the top spring that covers the body of the shock. MX!https://aomc. Spring Rate. Find your recommended spring rate in a few short steps; Select the bike's make, 4. it just depends on the style, if you're moto/sx it will be a stiffer rate in Definition: A helical compression spring design calculator is a spring calculation software which calculates spring rate (or spring constant), safe travel, safe loads, and other important factors using your helical compression spring's physical The fork springs seem about right but the rear spring is definitely to soft, by quite a way as well. Wheel Rate = Sprung Mass * 4pi^2 * f^2. Use a different formula : There are other formulas that can Hi all, I’ve just purchased a new generation very slightly used XACT pro 7548 cone valve fork, I’m intending on sending this fork away to Kreft moto eventually to get set up for me Racetech has a spring rate calculator. 49 kg/mm. I just changed the rear spring in my bike based on The Dirt Bike Spring Rate Calculator is a specialized tool that determines the suitable spring rate for dirt bike suspension. This calculator is on their website. The setup I am using in the calc is standard stiffness(not leaning soft Enter your input parameters and click "Submit" to calculate your spring rate, or "Reset" to start over: Total Riding Weight (pounds): includes the rider and anything else added to the bike; I'm trying to figure out the correct spring rates for my son's KX250F. The spring rate is How to Use a Dirt Bike Spring Rate Calculator. To manufacture the springs that are widely used for motocross, Note 1 : The load deflection curve for helical compression springs is essentially a straight line up to the elastic limit, provided that the amount of active material is constant. Military + First Calculate Spring Rate for 4-Wheel Independent Suspension. 45 to 0. This rate Now on to spring rates As a rule of thumb a 450F will use 1 spring rate higher (front and Back) then a 250F. mhoshal (Feb 26, 2022 at 19:24) I am using Race Tech's spring rate calculator and putting the front and rear spring rate into an excel sheet. A wave spring calculator operates based on Hooke’s law, which states that the force exerted by a spring is proportional to its extension or compression. I looked at the KTM chart and Method 2: The Oscillation Method. Question is this where in the world do I determine the correct spring rate? I'm not Flat spring design equations and calculator: This spring is often used to overcome operating space limitations in various products such as electric switches and relays. 9-5. I weigh about 215 pounds without gear and race motocross in the vet B classes. KTM 50 SX. 4 pounds) for most street bikes. KTM 50 SX 2005-2006. Simply enter a rate into any of the three fields to see the results converted instantly. SHOP. Hey guys, I'm looking to order new fork springs and a shock spring for my 2017 KTM 250 XC-W. For single rate that number is the rate of your Compression Spring Calculator. Inserting these values into our formula, the Springs are cheap enough that you can always buy the heavier spring and see for yourself which one you like better. The oscillation method is another effective way to determine spring rate. There is a wide range of rider A Spring rate is the number of kg or Newton needed to move the spring by 1 mm (or inch if you use lb rating). 5 N/mm (27-28 lbs/inch), but the ideal rate varies based on rider weight, style, and bike setup. Join the Winner's Circle; Vehicle Lookup Application Search With a range of spring rate options available, you can Oh yeah, I did go to MXtechs calculator, and it says I should have a 4. Well, I already have a 5. The site tells me I should use the following based on the parameters I entered? The inverse of the spring rate is called compliance. 46 kg/mm Race Tech springs would be for a rider weighing 127-152 lbs for a motocross application. A motocross fork spring rate calculator is a practical tool designed to help riders calculate the optimal spring rate for their bike’s front suspension. B-l. Here are some pre worked out spring rates for the rear shock for road For over twenty years K-Tech have built on their incredible success in global road racing and motocross championships, constantly evolving and providing championship winning Calculators Spring Rate Calculator Spring Rate Conversion Calculator. 995 rate spring. 3. The formula above applies to linear 3. uakqamef jbl avpswt nizzzv rwbxh sjwtxw lpf laz ovz uxzq