Brake Caliper Bolt Replacement Guide

Replacing a brake caliper bolt is straightforward, but doing it wrong can mean a loose caliper mid-ride. Here is the step-by-step process.

Step 1: Identify the Correct Bolt

Most road disc brake calipers use M6 bolts in lengths from 20 mm to 35 mm. Flat-mount calipers typically take shorter bolts; post-mount take longer. Check your frame's mounting standard before ordering replacements. TiNE offers titanium disc brake caliper mounts at 5.9 g for Specialized SL8/S5 and 7.5 g for universal flat-mount.

Step 2: Remove the Old Bolt

Use a 5 mm Allen key (or T25 Torx for some models) to loosen the caliper bolt. Support the caliper with one hand so it does not hang from the hose. Inspect the old bolt for thread damage or corrosion — if either is present, discard it rather than reuse it.

Step 3: Clean and Prep the Threads

Wipe the frame's threaded insert with a clean rag. Apply a small amount of medium-strength thread locker (such as Loctite 243) to the new bolt threads. This prevents loosening from vibration without making future removal difficult.

Step 4: Install and Align

Thread the new bolt in by hand first to avoid cross-threading. Snug it with the Allen key, then align the caliper so the rotor sits centered between the pads. Tighten to the manufacturer's recommended torque. Spin the wheel to confirm no rubbing.

Titanium brake hardware at tinetech.com