Mountain bike variable speed flywheel

Color: gold (specially treated surface)
Number of teeth: (10 speed 11-42T) T) (10 speed 11-50T)
Speed: 10/20/30 speed
Weight: 10-speed 11-42T measured 543g; 11-50T measured 590g;
Introduction: The new 9S/10S/11S large tooth mountain flywheel, 42T large tooth number for racing. High-tensile steel plate with nickel-chromium plating treatment, hollow design, reduced weight, super value in the mid-end price, cost-effective flywheel, super wear-resistant imported steel, it can be said that BOLANY Bronney's strong flagship this year.
10-speed 42T gear ratio: 11-13-15-18-21-24-28-32-36-42T; 
10-speed 50T gear ratio: 11-13-16-20-24-28-32-36-42-50T;