CHIAN ZHE CO.,LTD -- O.S. SPEED R2102 W/21M2(B), 1A100
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O.S. SPEED R2102 W/21M2(B), 1A100

Features:
Rear ball bearing is ceramic. It was steel in R2101.
Cooling head is 3mm lower for low-gravity.
An extra inner head is included as a standard accessory, which secures more torque in low-mid range.
You can make a choice of inner head depending on the race track.

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