The Shimano RS770 Rear Disc 32 hole Hub builds off the success of their previous Ultegra 6800 hub, adding in E-Thru Axle and disc brake compatibility. Featuring a lightweight aluminum construction, when paired with the RS770 Front Disc Hub, the set shaves 60 grams off the previous version even with the addition of disc brake and Thru Axle compatibility. Designed for stiffness, responsiveness, and comfort, the RS770 hubs offer greater stability and more efficient power transfer that comes straight from Shimano's top-of-the-line tech.
- 10/11-speed compatible.
- Hub width: 142mm.
- Spoke holes: 32.
- Disc brake mount: Center Lock.
- Weight: 294 grams.
- 12mm E-Thru Axle compatibility.
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Economical 12x142 TA freehub with loose ball bearings
This is a pretty standard loose ball Shimano hub. It doesn't have the digital adjustment process that the last gen of Ultegra and DA hubs had, so you need 2x 17mm wrenches to open it up. I built it up on HED Belgium rims and the set is bomb proof. The freehub was sticking a bit when I first received it, but loosened up after the first ride. The bearing adjustment was off as wheel (too much play), but I opened it up, repacked the grease, and tightened it up and it's been fine for 500 miles. They roll really smooth and are incredibly inexpensive compared to other TA 12x148 roadgravel options (i.e. DT 240s, etc.)
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