The revolutionary Progressive springs fit shocks of any length with 50 - 65mm of stroke. Progressive springs increase ending-stroke support by approximately 20% over linear coil springs - allowing them to be used on frames previously requiring the progressive nature of air suspension.
To work out which spring rate you need please use our spring calculator by clicking here.
Want a more accurate calculation? Click here for our advanced calculator
MRP Springs are 38mm ID - For spring adaptors click HERE
Please note for use on non-MRP brands you will need a spring spacer kit due to the inner diameter of the spring, they can be found in the table belowWe advise checking the total available spring length on your shock if you have a stroke length of 57mm or less.
|Shock Brand / ID||Spacers Required|
|MRP / 38mm||No Spacer Required|
|Rockshox / 38mm||No Spacer Required|
|Ohlins / 36mm||✔ - 38mm-36mm|
|Cane Creek / 36mm||✔ - 38mm-36mm|
|Fox/2019+ Marzocchi / 35mm||✔ - 38mm-35mm|
|BOS / 36mm||✔ - 38mm-36mm|
For other brands please measure the OD of the spring seating surface, if in doubt please contact us HERE