Klikový hřídel 81.3, 1300, 1.625″

Forged EN40B steel Race crank for the 1300 solid wall block with the main width of 1.211″ but has 1.625″ big end journals sizes as per the original Cooper S. All cranks have been re drawn to benefit from latest technology by having the larger crank webs designed to reduce whip and resistance at high revs giving smoother running and easier balancing, plus being mass centre balanced.Always checK gearbox for clearance with these large websThe bored holes for the big ends reduces weight of the crank and does not require drilling through the largecounter balance C shape webs.