The Chris King MTB Boost AB ISO Front Hub will be appreciated by mountain bikers for its ultra-smooth bearings, durability and precision steering, thanks to a stiff one-piece axle. Like all Chris King hubs, it features King's signature fast, smooth bearings that get quicker with age and is fully serviceable, so that it will withstand year after year of thrills and spills on the trails. The bearings have heat-treated, surgical-grade steel races that are machined simultaneously to ensure perfectly matched inner and outer races. Plus, the whole mechanism is protected from spray and mud by bearing seals and snap rings, so there's no fear of everything grinding to a gritty halt one day. With a selection of beautifully finished colours, Chris King products add a finishing touch of understated elegance or pop of head-turning colour to suit your riding style. Key features: King Lifetime Warranty Fits 110x15mm Boost Legendary made-in-house bearings Easily serviceable with a T10 Torx and pick or pen knife Completely re-buildable with our ISO Hub Service Tool Available in 24, 28, and 32 hole spoke count Available as standard Boost or Boost AB. Axle Width of 110mm A Flange Diameter DS and NDS of 57.4mm Centre to Flange DS is 35.5mm Centre to Flange NDS is 27.5mm