Shimano’s new FC-RX810-2 crank balances weight and efficiency for mixed-terrain riding. Gearing options cater for the specific demands of gravel riding and to maintain tighter gear steps for maintaining pedaling rhythm. The 2×11-speed crank is available in a 48-31T, 40T, and 42T chainring combination and 170, 172.5, and 175mm crank arm lengths.
– Gravel gear ratios preserve riding rhythm over rough surfaces with wider tires
– Optimum gearing for mixed terrains and riding styles
– Wide-range double
– Gear combinations: 48-31T, 40T, 42T

SHIMANO MTB OTHERS BOTTOM BRACKET , BB - UN300, ( SELECT OPTION = BSA 73MM , 122.5MM(LL123), W/O FIXING BOLT )
Topeak Ratchet Rocket Lite NTX+







