Two Stiffer rear shock springs for the Evo,the first is aproximately 10% stiffer! This is for riders weighing 12/14 stone. Or simply if you would like it a bit harder on the rear.The second is For riders up to 16.5 stone this is 20% stiffer than standard. Coming soon will be stiffer fork springs end of Feb expected, Spring settings 12stone spring length 135mm 13stone 130mm, 14stone 128mm.On the second spring set at 132mm. you will need to dial in some more rebound damping, this is a personal thing, Just make sure the rebound is not too fast. You will notice the spring is different sizes on each end make sure you fit the correct way up.White spring is 14st and yellow spring is 16.5.