Custom developed by BBR Motorsports for mini four-strokes. Increased spring rate for fast/aggressive adult mini riders. This shock works for XR/CRF100 / XR80, CRF80 applications and also as a replacement shock for BBR's SuperShock by Elka which comes on Perimeter frame kits and some SuperComp Swingarm kits. Fits the big wheel CRF125 FB 2014-Present.