Disc Rotor Center Lock Cap: Steel vs Titanium for Road Bikes

Your disc brake rotor spins between the pads, but what holds it to your hub? That small cap is called a center lock — and it is one of the easiest upgrades on a road bike.

Center Lock vs. 6-Bolt

Road rotors attach to the hub in two ways:

• Center Lock — A splined interface with a threaded lockring. Faster to swap, used by Shimano and SRAM on most modern road hubs.
• 6-Bolt — Six Torx bolts secure the rotor to the hub flange. Universal but slower to change.

Both systems work well. The choice usually comes down to your wheel hub, and most performance road bikes today ship with Center Lock.

The Center Lock Cap Upgrade

Stock steel caps weigh 12–18 g each. TiNE titanium caps cut that by more than half while resisting corrosion and maintaining full strength. Grade 5 Ti-6Al-4V has roughly 43 % lower density than steel with comparable tensile strength — every gram saved at the wheel center is rotating mass you do not have to accelerate twice per revolution. Eight anodized finishes available.

How to Replace a Center Lock Cap in 3 Steps

1. Remove the old cap — Hold the cassette with a chain whip, then turn the lockring counter-clockwise with a bottom bracket tool or Shimano TL-LR15 wrench.
2. Clean the interface — Wipe dirt from the splined surface and check for thread damage before installing the new cap.
3. Install the new cap — Thread on by hand until snug, then torque to the manufacturer's specification. Reinstall the rotor if removed.

Shop titanium center lock caps at tinetech.com