An all-new, lightweight hubset designed expressly for the demands of road racing.
The R45 hubset is 20% lighter than the already light Classic hubset. Chris King started by making both front and rear hubshells smaller and sleeker and then adding all-new 17mm axles. That's 17mm from dropout to dropout resisting deflection during cornering or when the power is full on. They designed a new driveshell to fit the new rear hub design, removing as much weight as possible from the shell and its inner components. But the highlight of the rear hub is the super quiet, fast-engaging all-new 45-tooth stainless steel RingDrive.
The R45 hubset has its own all-new stainless steel sealed bearings. As with every King bearing, these bearings are made in-house in Portland, Oregon and individually hand-checked for precision and smoothness. King's proprietary bearing design allows them 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 2.5mm hex wrench and penknife
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