Chris King R45D Hub

The R45D is designed for standard 142mm thru-axle spacing. It is not compatible with Boost spacing (148mm), so verify your frame's rear axle spacing before purchasing.

This hub uses the Centerlock standard for rotor attachment. You will need Centerlock rotors, or 6-bolt rotors paired with a Centerlock adapter.

The 45 points of simultaneous engagement provide near-instant power transfer when you start pedaling. This is particularly noticeable on technical gravel climbs or when accelerating out of tight corners on the road.

Yes, Chris King hubs are designed to be fully serviceable. You can easily access, clean, and lubricate the bearings and the RingDrive mechanism with standard tools, which is a key reason these hubs last for many years.

The stainless steel bearings are the standard, highly durable choice for most riders. The ceramic option offers slightly lower rolling resistance and weight savings, though it requires a bit more meticulous maintenance to keep running perfectly.

Yes, the distinct, high-pitched buzz is a signature of the RingDrive system. It is a byproduct of the 45 engagement points interacting, and while it is quite audible, many riders consider it a hallmark of the hub's precision engineering.