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For the TD4 rear brake caliper (GRX), we’ll need Shimano 33 (C) & 29 (C2) mm fixing screws.  Correct?

Steve The Intern Answered question October 25, 2023
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Minimum thread engagement stated by SRAM is 5 to 7mm; couldn’t find Shimano as quickly. Our slider is 17.5mm thick. So minimum bolt length is 24mm (washer compensation), up to a max of probably around 30mm before you would bottom out on the inside of the caliper and not be able to tighten it down.

Steve The Intern Answered question October 25, 2023