The hard-shell 5

but costs at least $250

The integrated limit stop prevents any slipping around the bolt head and allows higher torque to be applied

Fits onto the four original frame mount points and includes an additional burly component that fits to the rear

Supersprox - Sprocket 15 Front Yamaha SI (CST-1591:15.2) Option:15T The hard-shell 5Fully lightened with radial holes. Ultra hard surface layer reduces friction to prevent power loss caused by chain drag. Grooved teeth maximize sprocket life by preventing dirt build up. Made from SCM 435 Carbon Free steel and carbon impregnated. Made in Europe The refined core structure ensures that the teeth will not break when worn, like cheap C 45 sprockets. MATERIAL Steel CHAIN 525 TEETH 15 COLOR Black OVER ALL THICKNESS 11 SPLINE ID 26 SPLINE OD