Shimano Dura-Ace TT/Tri Extra Large Chainring

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Shimano Dura-Ace TT/Tri Extra Large Chainring

Large rings rock in speed events like Time Trials and Triathalons. Transform your TT bike into a serious speed demon or make up for smaller 650c wheels. These large Dura Ace quality rings fit standard 130mm road cranks. For best results mate 54 and 55t rings to a 42t inner, mate 56 and larger to a 44t inner. 130mm BCD.