Its dual-sided measurement is accurate within 2

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Lining material: Resin (5th generation)

For SPD-SL

HG601 Chain 11 speed

shimano ultegra rear derailleur di2 spec rd r8150 12 speed sale40 Its dual-sided measurement is accurateSHIMANO ULTEGRA Rear Derailleur Di2 RD R8150 12 speed Fastest ever rear shifting, 58% faster than RD R9150 Compact design includes an integrated wireless unit, charger, and switch LED status indicator Battery indicator Pairing Adjust mode, etc. Wider range capacity Max. low sprocket: 34T Product Description With the fastest, most accurate shifting, the new 12 speed ULTEGRA R8150 rear derailleur is more versatile than ever thanks to a single cage