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RS770 Rear Disc Hub 32Hole

Mfg PartNum:EFHRS770B
  (1 customer reviews)
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Pro-proven propulsion.

Designed alongside the Ultegra R8000 groupset, the brand new Shimano RS770 Rear Disc 32 hole hub provides pro-proven performance from Shimano's top-of-the-line tech at a lower, more affordable price point. Designed for unrelenting stiffness without sacrificing comfort, the lightweight rear hub builds off the success of the Ultegra 6800 hub, but now with 12mm E-Thru Axle compatibility. When paired with the RS770 Front Hub, the set shaves almost 60 grams off the previous generation, while adding Center Lock disc brake and Thru Axle compatibility.


  • 10/11-speed compatible.
  • Hub width: 142mm.
  • Spoke holes: 32.
  • Disc brake mount: Center Lock.
  • Weight: 294 grams.
  • 12mm E-Thru Axle compatibility.

Rear Hub Spacing: 12x142mm 


Mfg PartNum: EFHRS770B 


Disc Bolt Pattern: Center Lock 


Hub Drilling: 32 Hole 

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Economical 12x142 TA freehub with loose ball bearings
by Tom
Denver, CO
3 of 3 customers found this review helpful.

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.)

Reviewed 9/12/2018
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