Shimano DI2 ST-7971 Tri/TT Shifters
Di2 - Digital Integrated Intelligence - electronic shifting
Published weight 116 grams (pair)
10 speed compatible
Double and Compact Compatible
Japan Retail price 39.421 yen (see cross rate here)
Compatible ONLY with Shimano following parts: RD-7970 and FD-7970
Compatible with Brake Calipers: BR-7900, BR-7800, BR-6700, BR-6600-S/-G, BR-5700, BR-5600.
Require to be used with Shimano; SM-BTR1, EW-7970, SM-EW-79F-I (with SC-7900) or SM-EW79A-I.
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