Our new heavy-duty rear axle and compound gear ensure longevity with a metal-injected compound gear, replacing the standard aluminum gear used in 1RC4000.
Includes:
- (1) Rear axle assembly with 48T spur gear (0.4M)
- (1) HD Compound gear 43/13 (0.4M)
- (1) Bearing shim
- 1.38g heavier versus 1RC4000
