Disc Center Lock Cap Inner 4.6 g Titanium — Center Lock Only, No Six-Bolt

TiNE makes two center lock cap versions for different use cases:

Outer cap (5.5 g) — dual-function. Converts six-bolt hubs to accept center lock rotors AND serves as a direct replacement on native center lock hubs. One piece does both jobs.

Inner cap (4.6 g) — single-function. Designed exclusively for center lock hubs. It fits the inner rotor interface profile, which is narrower than the outer profile. The 0.9 g weight difference comes from the smaller profile — less material, less threading surface, one use case.

If you ride a six-bolt hub, choose the outer cap. If you ride a center lock hub that uses the inner rotor interface spec, the inner cap is the lighter, more precise option.

The inner cap has a narrower threading profile because it only engages the center lock interface — no six-bolt conversion threading needed on the inner face. Less material means less weight: 4.6 g versus the outer cap's 5.5 g.

The 0.9 g difference is structural, not a compromise. The inner cap uses the same Grade 5 Ti-6Al-4V material and CNC machining precision as the outer version — it simply has a smaller functional footprint.

No. The TiNE inner center lock cap is not compatible with large-axle hub standards that require a different cap profile and clearance diameter. Large-axle hubs (common on some thru-axle disc brake systems) need a center lock cap with a wider inner bore and different thread engagement.

For standard Shimano center lock hubs, the inner cap fits directly. If your hub uses a large-axle standard, check with TiNE for compatibility before ordering.

The disc brake area is one of the most corrosive environments on a road bike — brake dust, road spray, wet-weather grime, and occasional chain oil overspray all accumulate here. Stock steel lock rings show surface rust and thread degradation over time, especially on bikes ridden in wet conditions.

Grade 5 Ti-6Al-4V resists corrosion far better than steel in this environment. The CNC-machined threads maintain precise engagement over years of use — no thread binding or corrosion-induced resistance when removing the rotor for maintenance or wheel swaps.

No. The inner cap is designed exclusively for center lock hubs. It does not have the conversion threading on the inner face that the outer cap uses to engage six-bolt hub flanges.

If you need six-bolt to center lock conversion, use TiNE's outer cap (5.5 g). The inner cap is the lighter, simpler option for riders whose hubs already run the center lock standard and do not need conversion functionality.