Rear surprise springtime 82mm - 4-Dots provides a variety of progressive & linear characteristics. The smaller design helps you to attain lower trip height on high traction tracks. The springs are slightly modern, but under more compression change faculties to become more linear. Thus giving exemplary feeling and feedback in all various track conditions. These XRAY surprise springs, like all other XRAY springs, are by hand measured, selected and matched into pairs to make sure properly equal size and damping characteristics.