ROTOR Round Chainring 12s/11s for Shimano 4-Bolt

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Compatible with SRAM 11s 50-34 ("compact"): If you ride a lot in the mountains. 52-36 ("semi-compact"): A great all-round combination – a customer favourite! 53-39 ("standard"): Gr eat for flat riding, time-trialing, and very strong riders. 54-42 ("TT and Fast RR"): A perfect combination for those that want to Time Trial or want bigger gears for sprinting. Also available in a 54-39 combination. Show more