humancannonball

Hello everyone,

New member, first post.

I have a 2019 Salsa Cutthroat Apex 1, and I *think* it has a press fit BB92 (I found some specs that listed it as having a PressFit 41 x 92mm bottom bracket, I think this is the same as BB92, please tell me if I'm wrong). It came with SRAM Stylo 6K Eagle DUB cranks. I'm wanting to swap them out with a set of RaceFace Atlas Hollowtech cranks and, first of all, I am needing to know if I can use a hollowtech crank, and if so, what adapter I need to get. This is my first bike with a press fit bottom bracket, so I'm really not familiar with the technology at all, and would welcome any input.

Thanks!

andrewclaus

I looked on the RaceFace website and saw a BB compatibility page. You'll probably need to replace the BB, and order the right length spindle for that BB.

alcjphil

The Raceface Atlas is a 2 piece crank, The spindle is permanently attached to the non driveside crankarm. Hollowtech is a term Shimano uses for their cranks

andrewclaus

When I looked at the RaceFace website, I saw a selection of spindle lengths available for different BB shell widths and chainlines.

Isn't the spindle on a two-piece crank usually attached to the drive side?

alcjphil

The Raceface Turbine crank on my touring bike has the spindle attached to the non drive side. As I remember, the Atlas was the same. However, the newest Turbine and Atlas cranks use a different spindle/crank interface than my older one which has a steel 24 mm spindle

cpach

You need to replace the BB. I'd fairly strongly recommend having a shop do the replacement if you don't have appropriate tools and experience. If you knock out or press in a bearing crooked it can absolutely crack your frame.

Hollowtech II is a Shimano standard, although some manufacturers might use it to refer to a crankset with a straight 24mm spindle. That said, I'm pretty sure the Atlas only comes with a 30mm spindle. I strongly recommend against installing this in your frame--PF92 is really designed for 24mm spindles, and using a 30mm spindle requires very thin bearings that have significantly worse drag and much worse bearing life.

davidad

pardo.net/bike/pic/mobi/b.bottom-bracket-standards.html

humancannonball

Hi guys,

thanks for all the replies. Sorry for the delay, life has distracted me away from things for a bit.

So I pulled the SRAM cranks off my bike to look at the spindle. The SRAM has a 30mm spindle, and the RaceFace's is 24mm, and the spindle lengths seem to be exactly the same. So it seems that using the RaceFace cranks should work fine as long as I get the correct press-fit bearings (and have them installed by the LBS so as to not damage my frame).

Again, thanks for the responses, much appreciated.