converting 10 speed freehub body to 11 speed (hope)

Wasn't aware there was a difference. I know about old style Hyperglide type, XD and Microspline for MTB. What's yours?

hyperglide has (apparently) several lengths. stolen from sheldon..

Common lengths from base of the splines that hold the sprockets to the outer end of the freehub body are

24mm -- 5-sprocket (5.5mm sprocket spacing)
29,5mm -- 6-sprocket (5.5mm sprocket spacing)
30.9mm -- 7-sprocket (5.0mm spacing)
34.9mm -- 8, 9, 10 sprocket, 11-sprocket MTB
36.85mm -- Dura-Ace 10-speed aluminum body, 11-sprockets road.

I've got 35mm, I need 36.8mm. I recon I can get away with a little less than 1.8mm off, 1mm might do it, just enough to get the last cog engaged on the freehub spline

So you have a MTB body that you want to fit a road 11/12 on to?

Just buy the road freehub and sell the mtb one or keep it for a spare.

Just buy the road freehub and sell the mtb one or keep it for a spare.

I've no use for the mtb one (i don't run hope on my other bikes), and I figure its not worth much as most people are onto more recent standards. New 11 speed one is £80, so if I can get away with a bit of grinding instead I'll give it a go 🙂

You can get an 11 speed road cassette that will fit a 10 speed freehub (105 and Ultegra I think (11-34)) CS HG700 or CS HG 800 although from what you've said you want a 12 speed road cassette (which fits on an 11 spd freehub) so non of that above is likely relevant.

Sorry, can't help with triming the 10spd freehub but I imagine someone with a lathe could help you there.

What are you on about most recent standards? MTB 12 speed is the exact same size as 8 speed. You have 35mm which is a knats bawhair off 34.9mm which will fit any MTB cassette.

Edit: sorry, reading that back sounds a bit off. Not having a go, just pointing out it's still perfectly functional and useful.

If its an original pro 2 you cannot buy an 11 speed road freehub for it. Evo 40t version you can though the non-40t Evo version I think is also not possible. Yes you can trim the freehub you have down. I did it to a original pro 2 with hand tools (the freehub was damaged anyway so no loss) but you'd be better doing it in a lathe.

I wouldn't rule out  your current one being worth a few quid as people with older wheels are more likely to need to replace bits!

I've turned other freehubs on a lathe and there looks to be enough meat on my Hope Pro 2 Evo's to do it to those too.

I've never filed them but it would be possible, just take a while.  I'd take the min off to get the cassette on.

I think I took about 1.2-1.5mm off mine which was enough to work and also get the cassette lock ring on, despite this being less than the theortical difference in width between road 11/12 speed and mtb 8/9/10/11/12

MTB 12 speed is the exact same size as 8 speed. You have 35mm which is a knats bawhair off 34.9mm which will fit any MTB cassette.

correct-ish (shimano 12 speed mtb is microspline, but low-end sram mtb 12 speed is HG), but road 12 speed is different, and you can't get narrow-ratio mtb cassettes. I don't need a 52tooth ring on a road bike..

If its an original pro 2 you cannot buy an 11 speed road freehub for it. Evo 40t version you can though the non-40t Evo version I think is also not possible

its an evo 40t, which i thought meant it came with the right body, but apparently not :/

I’ve never filed them but it would be possible, just take a while. I’d take the min off to get the cassette on.

just go at it with a standard metal file?

Just do as you suggest. Grind the shoulders down uuntil it works. In theory 1.86mm. Alloy body? A file is fine other wise an angle grinder and a bit of care works well. Have also used a dremel. It doesn't have to be perfect so if one shoulder is a touch too much don't worry.  10 minute job.

Have 13 pairs of disc wheels. for 4 CX bikes. Only pair started life as 11 speed specific yet all  now take an 11 speed cassette.

Yeah but my point was that it's still not in any sense worthless. I'm still running a Pro2, hell I'm still running XC!

Love an XC hub me. Especially silver.

I've converted most of my ancient 10 speed hyperglide freehubs to 11 by filing off the alloy lugs, using a hand file.

Pretty simple, as they are usually soft aluminium.

The only one that has me stumped is an old Zipp 900 disc wheel; I have an 11s Campag cassette (and freehub), which plays relatively nicely with eTap 11, but can't be upgraded to 12s.

As an update, I shaved the free hub body down and built the wheel this morning. Works well, there is maybe only 0.3mm clearance between the back of the cassette rivets and the spokes though, was below zero till I dished the wheel