Product Description [R31W271] Exclusive parts for GRK gear diff set Drive cups used for both acceleration and deceleration gears.
Use as spare parts in case of damage or loss.
Combinations of ring gear and drive cup used 39T ring gear for 10T, 11T, 12T → Use in combination with 29.5mm and 28.4mm. 39T ring gear for 16T, 17T, 18T → Use in combination with 29.5mm and 26.4mm.
