This is called “spring rate.” This is with a straight-rate spring; progressive and dual/triple-rate springs differ vastly. If you cut your Race Tech spacers so that the overall length of the spring-spacer-washer stack is the same as OEM, you will have the same 3/4" of preload already built in. Displaying 1 to 5 (of 5 products) «. At WeSTOC I discussed progressive VS straight rates with Mat Wiley (Race Tech and Rider Magazine Tech editor). RT Hi-Performance Springs have extremely accurate rates. or, does it just come down to proper set up and sag adjustment? $131.99. Specifications. Spring Rate = 171,661,370 / 10,000. He tested the springs and the rates were off enough that I had to get a new set of springs. My set up came with shock and springs and came out perfect. 20231XHD. That's for a 230 pound total weight by the way. This item: Race Tech 201-622864 Shock Spring 6.4Kg. Accurate rates to within 2 percent. Race Tech spring rates are historically high, after all their name is 'Race Tech'. Make sure to select the correct spring rate for your riding weight, type of riding… Getting different opinions. Dual Rate Kit for the rear, which gives a substantial improvement in ride quality while improving handling as well at G-out resistance. In order to get back to the same spring rate as a stock, single spring system you would have to use two 500 lb springs. How many springs? I like the k-tech better, it’s a little more thought-out in its design and simplicity. FRSP 4348 42KG/MM. These springs are held to the highest rate standard. novice rider, this upgrade will make a drastic improvement in the CRF250L's handling for most riders. Enter your suspension measurements in the white boxes below. There's a lot of sources for them, us obviously, Race-Tech, Traxxion, Eibach and Ohlins are also well made, accurately rated springs. Just my opinion here but if you are only going moto, use single rate. $229.99. Race Tech Suspension mods review. Multileaf Spring Chrysler Type 152 lb. We also installed Race Tech fork springs, which must be used with Gold Valve Emulators to meet spring length requirements and to ensure proper spring rates. I had owned one of these red-roosters in my racing days and always had a soft spot for the 1990 Honda models. You could just get the recommended spring rate and have it tuned stiff for the track. Length, Pair. novice rider, this upgrade will make a drastic improvement in the CRF300L's handling for most riders. He added to what you said above by saying when preload is added, it takes up the progressive part of the spring and in effect making it a straight rate spring. Rate, 1.680 in. PAC Racing Springs pioneered high travel suspension springs when post race tech began disqualifying winning cars from too low of ride height, a result from spring sag and poor designs. Choosing a "race" set up is very stiff for street riding Deciding on spring rates is one of the most important decisions you have to make about your race car set up. Drag race cars will normally use a lighter rate spring (about 30%) to promote weight transfer while a street car will use a fi rmer rate spring (about 25%). If you watch here and Facebook you can get used single spring conversions for $250-$400. Start count with cut-off end facing you directly above would be one and so on. Cutting the spacer longer will result in additional preload. Wanted to get a re-valve done so I took it to a local KTM suspension shop. Ships from and sold by SVS Power Sports. › See more product details. Through years of testing and manufacturing experience, Race Tech has developed a full line of Hi-Performance Springs using the finest materials and processes. RT Springs have the highest stiffness-to-mass ratio in the industry; making them extremely light weight for their particular rate. These kits feature top of the line Eibach brand springs which replace the low quality / saggy / poor riding OEM springs. I weigh 150lbs and use .925 springs and can use all but 1/4 inch of fork travel so I'm pretty much dialed in. I see that most have used the Progressive springs which is a dual rate spring. The single adjuster knob controls both compression and rebound for a simple setup on and off the track. Seems like some heavy springs compared to KDX spring … Race Tech is a one size fits all damper, the DDCs were designed by Rick at Cogent for his own 2001 DR. As a rule of thumb a 450F will use 1 spring rate higher (front and Back) then a 250F. I run .42kg springs. I have a del soggio spring conversion in one bike and k-tech in another. The rates should be comperable since it is measuring compression in length with a set amount of weight. This is a true dual-rate spring kit with adjustable crossover collars from Schmidty Racing Suspensions for the Polaris RZR 900S and 1000S (2015-current). On XC/CRs I get stiffer springs and set them up with less preload, but on WRs I cut them (which slightly increases spring rate) and use a spacer. These collars will thread right onto the OEM shock body without any shock modification. C of G - above ground (vehicle) 305.00 mm - above ground (sprung mass) 308.59 mm - from front axle cl 1348.15 mm - height above roll axis 232.65 mm Single wheel rate - front - tyre 175.00 kg/cm 979.95 lb/in - spring 17.89 kg/cm 100.18 lb/in - arb 6.80 kg/cm 38.08 lb/in - combined 43.27 kg/cm 242.33 lb/in Race Tech Hi-Performance Shock Spring Kit CRF250L Rally'17-20 - Race Tech rear shock spring. IK Racetech Suspension: 36mm Single Adjustable. The fork is the 48mm USD XPlor using the same spring as the second generation 4CS. So whether you are on the track, commuting to work or loading up with luggage these springs will perform great! ASf/(spring free length x 0.25) = Firmer Spring Rate ASf/(spring free length x 0.30) = Softer Spring Rate 2017- 250L will require a 10mm spacer as spring length is 590mm. PAC Racing Springs pioneered high travel suspension springs when post race tech began disqualifying winning cars from too low of ride height, a result from spring sag and poor designs. Hey I'm just looking for some input. I have the .95 Race Tech fork springs and a rebuilt shock by Race Tech. Reinforced Leaf Spring Chrysler Type 166 lb. 20231MHD. Jul 10, 2014. Fork Springs, 26 lbs./in. It isn't even close to stock how good it is. Choose from varying spring rates to suit your biking needs.Honda Grom 125 … This should be done before the coilover is installed. From there, valving is used to control the action of the suspension. Open Wheeler Race Car. Part Number: RTH-FRSP434946. Run a single Japanese 40mm seal, 10-15wt oil at 6-6.5" from the top, springs out/forks collapsed. Enter the value you want to convert Conversion results After you have entered in a value please select a conversion. It looks like the Rack Tech springs are single rate springs and the Ikon springs are progressive rate springs. (500 x 500) divided by (500 + 500) = 250 lb combined spring rate which is 2000 lbs when compressed 8 inches. Tech support is also available from Race-Tech. Race Tech High-Performance Springs are made of chrome silicon, with a high stiffness-to-mass ratio and shot-peened, heat-treated and preset for no sacking. Race Tech spec'ed the 5wt. I'm interested to hear opinions on the Hyper Pro progressive springs and how they feel compared to the linear Race Tech or Sonic springs since the weight range is wider on the Hyper Pros. So the DDCs are designed for the DR by a guy that actually rides a DR and makes his living on aftermarket suspensions, a no brainer IMO. Progressive rate springs. RaceTech Fork Springs (Sportster) Through years of testing and manufacturing experience, Race Tech has developed a full line of Hi-Performance Springs using the finest materials and processes. It is about .02 Kg/mm rate addition for each 25 pounds of rider weight. Features: High performance spring ; Extremely accurate rates I have zero technical knowledge in this area, but it just seems to me that "progressive rate springs" are the most logical thing ever invented. by JerkyChew » Fri Mar 29, 2019 11:41 am Quick update, I found the calculator on Race Tech's site and it … Free Shipping. The Race Tech Fork Springs have been manufactured with the finest materials which results in each spring having a high stiffness-to-mass ratio, they are lightweight for their particular spring rate. Thank you for participating on … Sep 15, 2007. We answered the demand using cutting edge materials and processing, thus reducing cost over expensive and ineffective aerospace alloys typically used. Single rate springs are the most common.They are the best choice for most applications, particularly those with a linkage. It's still a useful tool but in most cases I will take the RT recommendation and back off 10%-15% as a starting point. Make sure you use the Race Tech web site calculator to get the right spring rate for your body weight. *High quality shock springs. Having the correct shock spring is critical for performance and safety. preload . It is snowing now in NJ so I cant test it, but it seems very stiff compared to my CR250. I have an 88 fxr with the 39mm forks and am looking to upgrade the stock springs but can't decide on progressive (brand) springs or going the racetech emulator and spring route. We answered the demand using cutting edge materials and processing, thus reducing cost over expensive and ineffective aerospace alloys typically used. Race Tech ATV Front Shock HP Spring Kits are dual or triple rate depending on the application. 4725-05. Hassle Free Returns. Convert lbs/inch kg/mm Convert lbs/inch N/mm Convert kg/mm lbs/inch Convert kg/mm N/mm Convert N/mm lbs/inch Convert N/mm … I went with 5wt, but I also did Race Tech gold valves at the same time. “Progressive rate springs” are generally classified into two sub-types: 1) constantly increasing rate springs and 2) a “dual-rate” spring with two linear rates connected with a rate-transition range. Shop Race Tech Shock Springs at 2Wheel. Kits are available for either 2 or 4 seat models. You probably won't go wrong with a .90 spring. Unless your team has done the necessary analysis and testing, do not accept the springs as they are from the previous owner of your car, or from a Supplier ("these are right on such and such car"). Estimated Ship Date: 3/24/2022 (if ordered today) Drop Ship. The suspension was shortened after '11 as many complained it … (A spring marked 5.0 could be the same rate as one marked 5.4!) The OP might love a single sided spring conversion, the only way to know that is to buy the 600 dollar kit and try it. Make sure to select the correct spring rate for your riding weight, type of riding… Rate 6-5/8 Inch Arch. Free shipping for many products! This item: Race Tech 200-435148 Fork Spring 0.48Kg. Race Tech CRF250L Fork Upgrade Kit includes (1) higher rate spring for the left fork, spring spacer and anything else needed to fit this kit onto your motorcycle. High Performance & Quality + Local Production! Works Performance. Specialty re-valve for off-road (Enduro, Hare & Hound, Hare Scrambles, Rocks, and Single Track. But the "truth" that has been established from some of the high profile test riders in media that a spring fork conversion is a gift from God and it will fix everything is not the case for everyone. The stock rate on your bike should be 63-66-69N. The demonstration above (Figure1) illustrates two 100lb/in springs stacked in series as a dual rate system with a combined rate of 50lb/in. In Stock. Race Tech Front Spring Kits retail for $299.99 to $369.99 for the pair. Race Tech SRSP 672760 Shock Spring - 6.0 kg/mm. Nov 24, 2011. Buy Now. While $355 is a great price for the mono kit, I consider the $110 I spent on the progressive rate spring to be the best bang for the buck investment I ever made. Just had my suspension revalved with the recommended stock springs. Only 14 left in stock - order soon. With those emulators you also get Michael Morse's expert tech support and installation instructions. Chrome silicon, high stiffness to mass ratio, shot peened, heat treated and pre-set (no sacking). Spring Rate is defined as the amount of force required to move the spring a given distance, which means a 100lb/in spring will travel 1 inch for every 100lb of force exerted on the spring. Previous generation PDS shocks use a 255mm spring and a double piston design. Ships from and sold by Powersport Superstore. If you are riding woods/off-road, use the dual rate. If you are a regular reader of PulpMX, you probably know that last year I did a project bike for the site. Fits Honda CRF250L and Rally. They sent me EXIT 2 3 way adjustable shocks all the way around and single rate springs, 250's in the back and 225's in the front. Free Shipping. It's a single piston with a 225mm multi-rate spring. Re: Shock spring rates needed! NOTE : Race Tech Fork Springs are required for most Emulator installations due to spring length and rate. The Race Tech Spring Conversion System (SCS) transforms your air spring forks found on Kawasaki KX450, Suzuki RMZ450, Honda CRF250 and KTM/Husqvarna WP AER 48 to a coil spring setup. Good question. Race Tech FRSP 434946 - Race Tech Fork Springs. | Are there any advantages to the progressive springs? FREE Shipping. 40 43 and 46 rates. What I use and strongly recommend is what MMM sells at 650 Central: the original Race-Tech cartridge emulator, designed by Paul Thede, and made in the United States. Looking for testimonials. I find the 5wt to make the front very controlled but plush with the valving and 1KG springs I put in. Adding a progressively wound steel spring to the mix is just making a bad situation worse. The Race Tech calculator does tend to err on the firm 'racer' side for both spring rates and damper valving. Most manufacturers hold their spring rates within 5% of the listed rate. This means a spring marked 5.0 kg/mm could be a 4.75 or even 5.25, and a spring marked 5.0 could be the same rate as one marked 5.4! RT Hi-Performance Springs have extremely accurate rates. This calculator will only give approximations depending on the accuracy of your information. Race Tech instead offers a Hi-Performance Spring Kit to add a stiffer spring to the left fork. What is everybody running for KLX fork springs on their KDX? Ships from and sold by Amazon.com. RACE TECH ULTRA-SLICK SUSPENSION FLUID Slippery, temperature stable, long wearing, non-foaming suspension fluid is the heart of a "no compromise" suspension… Manufacturer Race Tech This Race version dual rate spring hardware kit from Schmidty Racing Suspension converts the OEM, aluminum body Fox 2.0" shocks into truly adjustable dual rate shocks. Date published: 2015-06-03 Rated 4 out of 5 by Leuf from Reduced dive under heavy braking I was looking to upgrade the front wheel's handling and it did quite a great job. The OEM springs already have some preload, about 3/4" worth. Do you find the forks under dampened? The addition of a second short spring makes it softer still (0.40 kg/mm). Spring Rate = 171.66 lbs./per inch. The front is a single rate spring because in extensive testing, we weren't able to find enough gains to … Also, by measuring the total travel of the damper, we can easily estimate the total load placed on the spring during an event. They say the Heavy rate springs are a very stiff ride. Only 2 left in stock - order soon. (The overall spring rate in the forks is the average spring rate between both legs.) What are other members experiences with both of these set ups? Re: Race tech spring - what spring rate to get? Yes, I played with the spring rate calculator on the race tech site. 1-3 Day Delivery. Spring rate is the force required to move a certain distance whereas preload adds a fixed force across the whole stroke. 105 is a pretty ideal starting point, and likely the correct spring. (The overall spring rate in the forks is the average spring rate between both legs.) It's a single piston with a 225mm multi-rate spring. Hi all, I just acquired a like-new '94 KDX200. Not Yet Reviewed. ATVs using a "Race" setup may be better with a triple rate spring set.. More springs are not necessarily better. The addition of a single secondary (short) spring makes the rate softer (0.43 kg/mm). Designed to fine-tune your ride so you can enjoy top-notch performance Great for amateur motocross riders and professional bike rippers alike. With that said, your suspension performance is based on a combination of valving and springs. (current) Why bother running a Dual Spring system if it is the same linear rate as a single spring? 38.5mm outer diameter x 580mm free length. Previous generation PDS shocks use a 255mm spring and a double piston design. Model. The stock rate on your bike should be 63-66-69N. Rate 6-5/8 Inch Arch. I got a set of the racetech springs (frsp-3750k) for my dr650 and I noticed they are a 3 rate kit spring. Ships from and sold by SVS Power Sports. (2) We have a shock and fork spring rate tester and are very knowledgeable in it's use. Not Yet Reviewed. Springs and Anti-Roll Bars. Most manufacturers hold their spring rates within 5% of the listed rate. PRECISE RATES. So if you have a spring rated at 100 pounds/inch, it takes 100 pounds to compress the spring 1 inch. Diameter, 19.410 in. $109.48. Find many great new & used options and get the best deals for Race Tech .50KG Front Fork Springs FRSP 444650 at the best online prices at eBay! Woods/Off-Road, use the dual rate springs are race tech single rate springs for most riders prefer the of. 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