I have a 2013 HED Jet 6 (with 11 speed freehub body) and have a 10 speed drivetrain. How many spacers do I need before I place my cassette on the freehub body? The Jet 6 came with a spacer plus the little red rubber band. The cassette came with an initial spacer (3 total spacers counting the rubber band).
Check out the picture below to see the set-up. Do I need all of those on there to properly use my 10 speed cassette? It seems like the cassette barely fits on the freehub (not like previous set-ups I’ve had).
My rough guess is that you take one 11 speed spacer (like the one you put in between the cogs) and place it before you put the largest cog of your 10 speed cassette on. This should close the delta between an 11 speed free hub and a 10 speed free hub.
Have a look at this diagram for the dimensions. You are trying to convert your 36.75 mm freehub that is 11 speed into a 34.95 mm free hub for 10 speed. Basically you are trying to shorten it by 1.8mm
According to here it could be the 1.8mm spacer and / or plus the standard 1mm 10sp spacer (2.8mm total), best bet is to try the 1.8mm first, and if you can’t clamp the lock nut down then add another 1mm.
this image ( stolen from teh article linked above) shows the print on the spacer explaining the spacer requirement.
my jet9 ( hed hub ) came with it’s own spacer, 1pc@2.8mm mrked for 10spd as well.
Yesterday I tried 2 different 11sp wheels with 10sp cassette / Di2 (TT bike).
Both of the 11sp wheels came with 1 spacer. Assuming it’s the 1.8mm.
The cassettes went on and tightened just fine. But I found that I had to readjust the Di2 rear der settings, as well as the high and low limit screws.
And then if I try to use a 10sp wheel … it’s way off. I was not expecting that.
I guess the low gear limit screw makes sense, since the different dish would put the spokes closer on the 10sp wheel. But I would have expected the cogs to be in the same relative position.
An 11spd cassette is 2.85mm wider than a 10spd one… so when you put a 10spd cassette on a freehub designed for 11spd, you have an extra 2.85mm of clearance on one side or the other.
The 11spd-10spd spacer is 1.85mm thick. The spacer that comes with 10spd Shimano cassettes is 1mm. So if you put them both on, your smallest cog will be in the same place with either cassette. If you leave off the 1mm then the cogs will be 1mm farther inboard. Take your pick.
There is some variation anyway. I wish thin spacers were more common, so you could dial in all your wheels perfectly to eliminate derailleur adjustments when swapping wheels.
this image ( stolen from teh article linked above) shows the print on the spacer explaining the spacer requirement.
my jet9 ( hed hub ) came with it’s own spacer, 1pc@2.8mm mrked for 10spd as well.
Well you just took out all of the fun speculation in this thread
thanks. I am going to try the thin spacer also. The low gear limit screw thing will be an annoyance though, if the same setting wont work for older wheels.
adding the 1mm spacer made a big difference. I had to redo the rear der adjustment and limit screw settings – probably back to how it was before I messed with it, D’OH!
Seemed to work OK with a 10sp freehub also (though that one had a SRAM cassette on it).
