Shimano
Shimano road and gravel drivetrain: Dura-Ace, Ultegra, 105 Di2, 105 and GRX shifters, derailleurs, cranksets and power meters, bottom brackets, cassettes, chains and Di2 batteries, wires and junctions, plus Shimano pedals.
Gravel racing does not happen on one surface, so we did not build one tire. The Protocol lineup offers directional tread architecture, each tuned for different conditions. Same casing, same compound. The difference is what happens where the rubber meets the ground.
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