Portal Overdrive & Underdrive Gear Set (Steel)(1set)
Includes 8 steel gears to replace the stock portal gears to increase climbing performance.
Includes 22t x 2 gears, 24t x 2 gears, 15t x 2 gears, 13t x 2 gears and pins.
Front overdrive = 11.3%
Rear underdrive = 11.7%
Total underdrive/overdrive = 23%