CHAIN 6600 10 Speed 114L SR/GYHyperglide (HG) series 10 speed compatible chain, recommended for Ultegra drivetrains HG technology has chamfered inner plates to optimise shifting performance on HG sprockets Durability is assured through a chromising treatment on link pins, and the heat treatment of rollers, pins, and plates Mushrooming of the pins gives unsurpassed side plate retention, enabling the chain to far exceed the BS ISO standard for breaking force 5. 88 mm chain width,
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