Educate me about RaceFace crankset compatibility.

Not sure, but these are cheaper and will fit...
https://www.wiggle.com/p/shimano-slx-m7100-1x12-speed-chainset?color=black&crankLengths=30T+170mm&chainringTeeth=30T

Got SLX cranks on all my bikes, they are great.

That conversion kit if for changing the axle length, it'll still be 30mm diameter the same as your existing one. I've never seen a kit that would give a set of Turbines a 24mm axle.

+1 slx cranks

Turbines are 30mm axle so you'd need a new BB to use the Turbines or a new crank to use the BB.

You can get a 30mm BB to suit the Turbines, Hope do one.

I think the kit you link to will still be a 30mm axle just that you could use it with 68/73mm shell rather than 83mm.

I had the same issue last year when building g up a new frame and treated myself to a hope BB

Bearing life has been disappointing though so if I were doing it again I’d probably buy an  SLX crankset for 1/2 the cost of the hope BB. Especially as a replacement xt bb is half the cost of the hope bearings and seem to last as long

shame, I like the fixable/none disposable nature of hope parts

Have done the conversion with turbine cranks fitting to a 73mm threaded frame. I think you need a different bottom bracket rather than a different axle.

This is the raceface bottom bracket to fit turbine cranks to a 73mm threaded bottom bracket:

https://www.wiggle.com/p/race-face-cinch-bsa30-bottom-bracket?utm_source=google&utm_term=&utm_campaign=&utm_medium=base&gclid=Cj0KCQjw1OmoBhDXARIsAAAYGSGANfJvWErBHgkMfwtlGZECwf9001rIJ0C0yNcJFD8x_9HLa67Y6HkaAiwzEALw_wcB&gclsrc=aw.ds

Other threaded bottom brackets for 30mm axle will work too. Hope is fine, nukeproof I had to use an extra spacer to get it to fit.

@tom7044 that looks just the ticket, thank you.

When you say an extra spacer, what do you mean?

@kramer

I am meaning the spacers which are used on the bearing cups to set further out from the frame, there are 3 which come with the bottom bracket. For a 73mm bottom bracket you should only need one on the drive side as shown in this diagram (which comes with the bottom bracket):

With the raceface and hope bottom brackets the turbine cranks fitted great as described in the diagram, but with the nukeproof bottom bracket I found that the preload ring could not take up all the slack so had to put on another spacer on the non drive side.

Maybe the axle length on the turbine cranks must be a bit longer than other 30mm axles or maybe the nukeproof bearings are slimmer?

Thank you.

nukeproof bottom bracket I found that the preload ring could not take up all the slack so had to put on another spacer on the non drive side

Trouble with doing that is that you run the risk of having a gap between one of the cups and the inner sleeve a lot of BB's come with, meaning water can get in behind the bearing. Not that they are very well sealed with the sleeve in place but everything helps.

I had a similar problem with a BSA30 BB and raceface crank and used 30mm dia axle spacers like these:

https://www.ebay.co.uk/itm/403827337646

RES.CLOUDINARY.COM "https://res.cloudinary.com/fox-factory/image/upload/v1600385412/images/d9715b92f0f94eadb807eb34529905adfc447228_Crank_Q_factors_and_chainlines___16th_April_2020.pdf"

See table 3 in that link