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Looking for a short freehub body

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Looking for a short freehub body

Old 10-07-21, 05:01 AM
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Looking for a short freehub body

I got a nice set of wheels that would suit, but the rear is 130mm.

None of my bikes are 130 and they're not going to be.

It has a Hyperglide-C cassette. There is no extra space between the sprocket lockring and the locknut outer face.

If I just play with axle spacers the wheel will have to be dished more than I like.

So I think what I'm after is a Uniglide (or possible old Hyperglide/Uniglide compatible) freehub body - are they/which one is shorter?
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Old 10-07-21, 05:57 AM
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I have a Uni-Glide wheel, but it’s in ”deep storage”. I can’t measure it at the moment.
Best I can recall, U-G were 6-speed @ 5.5 mm spacing. 7-speeds have a 5.0 mm spacing.
On a U-G hub, the smallest sprocket will sit pretty much flush with the outside face of the sprocket stack. So If you can run a U-G cassette, then you’ll have saved 2 mm + the thickness of the lockring compared to a 7-speed HG cassette + lockring
Last time I checked, the smallest U-G sprockets were really hard to come by.
You might find yourself limited to a 5-speed rear. And using a lockring on one of those f/h bodies that goes both ways will eat up a few of those precious millimeters you’re trying to gain.
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Old 10-07-21, 06:03 AM
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Keep in mind too that not all Shimano freehubs assemble in the same way. I have not kept track but the Dura ace level and the subordinate level hubs were often different
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Old 10-07-21, 09:25 AM
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Originally Posted by oneclick View Post
I got a nice set of wheels that would suit, but the rear is 130mm.

None of my bikes are 130 and they're not going to be.

It has a Hyperglide-C cassette. There is no extra space between the sprocket lockring and the locknut outer face.

If I just play with axle spacers the wheel will have to be dished more than I like.

So I think what I'm after is a Uniglide (or possible old Hyperglide/Uniglide compatible) freehub body - are they/which one is shorter?
What hub do you have now? Are you trying to keep the Hyperglide-C cassette? If so, how many speeds is it?

If you don't mind limited selection of cassettes, building up a rear wheel with a 7-speed cassette road hub would allow you to keep the frame at 126mm. I've got a couple salted away for future builds.
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Old 10-07-21, 10:17 AM
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What hub do you have?
In my experience a lot of freehubs will fit but the seals can be different.
So i have used a donor hub.
Drive side seals and cones swapped over along with the freehub and axle.
nds side reuse the original seals and cones.
Should work.
But it's not a guarantee.
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Old 10-07-21, 11:17 AM
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Originally Posted by ThermionicScott View Post
What hub do you have now? Are you trying to keep the Hyperglide-C cassette? If so, how many speeds is it?
Hub is a Shimano RSX (FH-A410), cassette is seven speed, but I expect to do some dis-assembling and re-assembly with whatever sprockets and spacers I wind up with or procure.
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Old 10-07-21, 11:21 AM
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Originally Posted by oneclick View Post
Hub is a Shimano RSX (FH-A410), cassette is seven speed, but I expect to do some dis-assembling and re-assembly with whatever sprockets and spacers I wind up with or procure.
Ah, okay. So it should already have the shortest HG-compatible freehub body on it. (One of our bikes has that exact hub.)

I had originally typed that the hub should be 126mm, but checking Velobase, they might have come in 130mm as well. If so, you should be able to remove a 4mm spacer from the NDS and redish without giving up too much wheel strength.

You could also compromise and leave 2mm of that spacer on the NDS, making for less redishing. Then you'd just have to hold the dropouts open a tiny bit to insert the wheel.
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Old 10-07-21, 11:50 AM
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Originally Posted by oneclick View Post
Hub is a Shimano RSX (FH-A410), cassette is seven speed, but I expect to do some dis-assembling and re-assembly with whatever sprockets and spacers I wind up with or procure.
That FH-A410 hub has a 7 sp freehub and either 126 or 130mm spacing. See Shimano doc:

https://si.shimano.com/api/publish/s...A410-1508A.pdf

Did somebody put a 8-10 speed freehub on there? If so you need to find a 7 sp hub and put it back on there. If the 7 sp freehub is still on there, then just take the left side locknut spacer out, which should get you down to 126mm , and re-dish the wheel. And get a shorter axle.
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Old 10-07-21, 11:54 AM
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Originally Posted by ThermionicScott View Post
Ah, okay. So it should already have the shortest HG-compatible freehub body on it.
I'm hoping a uniglide body is even shorter, the bike is closer to 120 than 126.
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Old 10-07-21, 11:58 AM
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You ideally want a 7-speed Hyperglide-C freehub body. This allows you to install a modern 7-speed cassette with Hyperglide cogs, and allow the option of cassettes that start with an 11-tooth cog.

I am no fan of the old clunky Uniglide cogs, and although I never use an 11-tooth cog, the HG-C freehub gives you more options in the future.

This freehub body would mount to your Shimano (only) freehub body with a standard 10mm hollow bolt. Of course, you'd have to hacksaw off 5mm or so of axle from the non-drive side, and re-dish. For someone experienced, a 30 minute job. The trick will be finding this freehub; at my local bike Co-op we regularly get this kind of stuff, but YMMV.
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Old 10-07-21, 12:04 PM
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Am holding a UG-only 7 speed Shimano freehub in my hand, measures 35mm from end to end, so measure yours to see if it is the same.
Also have NOS 13, 14 & 15 tooth small/first UG cogs. Let me know if any of these bits will help you out.
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Old 10-07-21, 12:16 PM
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Originally Posted by oneclick View Post
I'm hoping a uniglide body is even shorter, the bike is closer to 120 than 126.
6- and 7-speed freehub bodies (whether UG and/or HG compatible) were the same part, AFAIK. The only way to get shorter (without reverting to freewheels) would be one of the rare early 5-speed versions, which did have a different part for the freehub body: https://si.shimano.com/api/publish/s...07-5-0606A.pdf

Or to buy the Grand Bois 120mm 5-speed cassette hub: https://cyclesgrandbois.com/SHOP/gb_lfqr_R120126.html
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Old 10-07-21, 12:23 PM
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Originally Posted by oneclick View Post
I'm hoping a uniglide body is even shorter, the bike is closer to 120 than 126.
Nah, they're pretty much the same. My old MTB with 6sp UG (Deore hub) measures 35mm and the spare 7sp HG freehub (3-3AP98010) I have on the shelf measures 35mm.
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Old 10-07-21, 12:45 PM
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I had rsx and they where 126mm.
Maybe all you have to do is remove a spacer and redish the wheel.
And swap the axle.
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Old 10-07-21, 12:51 PM
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Originally Posted by ThermionicScott View Post
6- and 7-speed freehub bodies (whether UG and/or HG compatible) were the same part, AFAIK. The only way to get shorter (without reverting to freewheels) would be one of the rare early 5-speed versions, which did have a different part for the freehub body: https://si.shimano.com/api/publish/s...07-5-0606A.pdf

Or to buy the Grand Bois 120mm 5-speed cassette hub: https://cyclesgrandbois.com/SHOP/gb_lfqr_R120126.html
I have one of those early 5 speed Dura-Ace hub sets. NOS in a box, it was barely bid against. One day for that special project.
Looking for a non dynadrive set of EX cranks.
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Old 10-07-21, 01:00 PM
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Originally Posted by repechage View Post
I have one of those early 5 speed Dura-Ace hub sets. NOS in a box, it was barely bid against. One day for that special project.
Looking for a non dynadrive set of EX cranks.
I'll be interested to see that come together!
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Old 10-07-21, 02:26 PM
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Originally Posted by ThermionicScott View Post
I'll be interested to see that come together!
Yeah, I have to reference the one European pro team that was using Shimano.
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Old 10-07-21, 02:47 PM
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I remember seeing these Grand-Bois some time back and intended to build some nice wheels for my '69 PX-10. Cool that they are still available (but I cant read Japanese).
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