EB14: Chris King Lefty Front Hubs Get Official, Plus New Threadfit Bottom Brackets
The rumors are true, the Chris King Lefty Hubs are now in production, and there are two versions available. He’s also got a new Threadfit bottom bracket for standard BSA frames that simplify the SKUs for shops offering more crank fit options.
The Chris King Lefty SuperMax hub is a standalone unit, made for Cannondale’s longer travel single-armed forks. The Lefty LD hub uses their standard LD (Large Diameter) mountain bike hub but replaces the axle and end cap then adds a 1mm disc rotor spacer. Rather than run new bearings, they opted to use their current bearings and create a new axle that allows you to adjust the preload like normal. It also lets you run the hub on any of the Lefty forks, from the older models to the race-ready XLR to the monstrous SuperMax.
Details and actual weights below…
The larger Lefty Supermax hub is on the bottom.
See the resemblance to their LD front hub? It’s the same shell and axle and preload ring.
The new parts are really just the Lefty axle bolt and the end cap, which functions as a self extractor cup that threads backwards over top of the axle bolt.
With the axle installed, the bolt that would thread into the Lefty’s spindle sits inside it, ready to lock it onto the fork.
Once the cover bolt is threaded on with a 6mm allen key, a 5mm wrench can pass through to tighten the bolt onto the axle. Technically, you could tighten the wheel onto the spindle first, but removing the wheel means you loosen the inner bolt first.
This is what it looks like from the other end.
The axle can be removed using their freehub tool for their regular hubs.
It weighs in at 219g with the included axle mounting bolt. Retail is $235 for each. Starts shipping October 31.
The Threadfit is a new version of their basic threaded bottom bracket that comes in just one size and without the ability to directly run a crankset…you’ll have to buy an adapter sleeve (aka Conversion Kit) to fit your particular crankset. They’ll be available for 24mm Shimano, 24/22 GXP, several 24mm BMX fits and two different fat bike kits (24 and 24/22).
The standard sleeves between the cups are 68/73 compatible. For wider 83mm DH and 100mm fat bike frames, you’ll need to order a Conversion Kit that includes the wider sleeve. Retail is $16 to $32, with the wider shell widths coming as part of the kits that cost more.