The ultra lightweight R45 hub has been designed expressly for the demands of road racing with two objectives. It must be light an fast.
The R45 rear hub is 15 % lighter than a Classic hub. Because Chris King has designed a sleek new hubshell body and a new 17 mm axle. That's 17 mm from dropout to dropout resisting deflection during cornering or when the power is full on. Additionally Chris King has designed a driveshell with a twin bearing design that responsibly removed as much weight as they could from the inner components. Even Chris Kings patented RingDrive engagement system has been redeveloped resulting in a quiet, fast-engaging 45-tooth stainless steel system unique to the R45 rear hub.
Furthermore Chris King designed and built a bearing specifically for the R45 hub. As with every King bearing, these stainless steel sealed bearings are made in-house in Portland, Oregon and individually hand-checked for precision and smoothness. This proprietary bearing design allows the developers to place more rolling elements per bearing meaning greater durability and precision. R45 bearings also feature lightweight, low-friction seals for fast rolling and can be easily serviced at regular intervals using only a single 2.5 mm hex wrench and penknife.
Compatible with SRAM Red eTap AXS, Eagle AXS, and all XDR and XD cassettes.
Clearance: R45 rear hubs can be used with 2-or-more-crossed lacing at the drive side and radial lacing at the non-drive side.
Material: Aluminium 2024 T6, stainless steel bearings
Weight supplement: in relation to R45D XDR rear hub - Centerlock - 12x142mm - 28 hole)
(weighed by Bike 24
