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Swapping free hub

Old 08-24-14, 08:04 PM
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Swapping free hub

I have a shimano 105 rear wheel with 10 speed free hub. I also have a fulcrum racing 7 wheel with a shimano free hub. Is it possible to put the free hub from the shimano wheel on the fulcrum wheel.
Thank you
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Old 08-24-14, 08:16 PM
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What model of hub is on the Fulcrum wheel?
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Old 08-24-14, 09:01 PM
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Originally Posted by riceman
I have a shimano 105 rear wheel with 10 speed free hub. I also have a fulcrum racing 7 wheel with a shimano free hub. Is it possible to put the free hub from the shimano wheel on the fulcrum wheel.
Thank you
Only if the Fulcrum wheel uses a genuine Shimano hub. As far as I can tell from the picture, Fulcrum uses their own brand hub.

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Old 08-24-14, 11:16 PM
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Unless you also want to squeeze the dropouts slightly each time you install the wheel, you're probably better off just using a 3.5mm spacer behind the cassette on your existing hub.
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Old 08-25-14, 08:18 AM
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Originally Posted by ThermionicScott
Unless you also want to squeeze the dropouts slightly each time you install the wheel, you're probably better off just using a 3.5mm spacer behind the cassette on your existing hub.
Fulcrum 7 is just a model designation and doesn't imply it's a 7-speed freehub. In fact, one web listing i found says the current model has an HG11 (11-speed) freehub body.

To the OP: no, the freehub bodies are not interchangeable.

BTW, Fulcrum is Campagnolo's second channel component line and lets them sell Shimano/SRAM compatible freehubs without sullying the Campy name.
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Old 08-25-14, 08:21 AM
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Originally Posted by HillRider
Fulcrum 7 is just a model designation and doesn't imply it's a 7-speed freehub. In fact, one web listing i found says the current model has an HG11 (11-speed) freehub body.
Whoops, totally misread the OP. Coulda sworn he'd asked about swapping freehub bodies to use a 7-speed cassette...
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Old 08-25-14, 08:42 AM
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Why? even it it could be done, you would get no benefit from swapping them, as they both do exactly the same thing, with exactly the same limits.

Could understand if you were asking about swapping a 11 speed freehub to a 10 speed hub, but your not in this case.
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Old 08-25-14, 10:00 AM
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Shimano hubs

Originally Posted by jimc101
Why? even it it could be done, you would get no benefit from swapping them, as they both do exactly the same thing, with exactly the same limits.

Could understand if you were asking about swapping a 11 speed freehub to a 10 speed hub, but your not in this case.
The reason I asked was I bought a single speed conversion kit with spacers. The spacers had guide notches on the inside which fitted on the shimano wheels 10 speed hub but would not fit on the Fulcrums Shimano 10 speed hub yet both hubs will take the same 10 speed cassette. I asked around many bike shop for spacer that would fit the fulcrum hubs but nobody has them.
Any ideas much appreciated .
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Old 08-25-14, 10:22 AM
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the spacers can't be far off if the cassette works on both hubs, but the spacers don't. if the spacers are plastic i would just take a close look and determine exactly where they are hanging up and take a file to them.

anyway, there are spacers that don't even concern themselves with the splines on freehubs. just spacers similar to stem spacers with a larger diameter. see Velosolo, pricey but will give your freehub some character. and if you are a DIYer, they can be made by slicing chunks off an appropriate PVC pipe you can probably get at the local Ace Hardware Store.

seems ridiculous to have the buy something so inexpensive as plastic spacers doesn't it? i've bought very, very cheap cassettes and busted them apart in order to get at the spacers (and cogs for that matter), for much less than it takes to buy a kit, or the fancy ones from velosolo i mentioned.

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Old 08-25-14, 10:27 AM
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Originally Posted by riceman
The reason I asked was I bought a single speed conversion kit with spacers. The spacers had guide notches on the inside which fitted on the shimano wheels 10 speed hub but would not fit on the Fulcrums Shimano 10 speed hub yet both hubs will take the same 10 speed cassette. I asked around many bike shop for spacer that would fit the fulcrum hubs but nobody has them.
Any ideas much appreciated .
Why would the spacers have orientation notches? That would serve no purpose. Anyway, if you get really stuck, I would grind these off. Likely you only have to grind off the one 'different' notch to make these fit. A few minutes with a Dremel fixes that.

Second fastest solution would be to scavenge some worn-out 6, 7 or 8-speed cassettes from your local Co-op. Remove the useless pins that hold these together, and pocket the spacers. Most of the older cassettes used circular spacers without any notches.
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Old 08-25-14, 10:42 AM
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Originally Posted by Dave Mayer
Why would the spacers have orientation notches? That would serve no purpose. Anyway, if you get really stuck, I would grind these off. Likely you only have to grind off the one 'different' notch to make these fit. A few minutes with a Dremel fixes that.

Second fastest solution would be to scavenge some worn-out 6, 7 or 8-speed cassettes from your local Co-op. Remove the useless pins that hold these together, and pocket the spacers. Most of the older cassettes used circular spacers without any notches.
you are right, they don't need notches! the OP mentioned that the spacers were part of a SS "kit", and only god knows what's in there. anyway, if they do have notches and one of them is an orientation notch, they should still fit. the fact that the cassette fits on the shimano hub AND the Fulcrum hub, means that the Fulcrum hub is shimano compatible. that the spacers work on the shimano hub means that THEY are shimano compatible too. i SUPPOSE that if there are orientation notches on the spacers, the OP could be trying to put them on backwards and might have more success if they were turned around, but that would be an insult to the OP, and i'm not even going to suggest it.
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Old 08-25-14, 10:45 AM
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Originally Posted by Dave Mayer
Why would the spacers have orientation notches? That would serve no purpose. Anyway, if you get really stuck, I would grind these off. Likely you only have to grind off the one 'different' notch to make these fit. A few minutes with a Dremel fixes that.

Second fastest solution would be to scavenge some worn-out 6, 7 or 8-speed cassettes from your local Co-op. Remove the useless pins that hold these together, and pocket the spacers. Most of the older cassettes used circular spacers without any notches.
Thank for your reply . I have believe my Shimano 7800 rear hub has the "funky" deep spline aluminum freehub that only works with Shimano 10spd cassettes which won't work with the single speed conversion kit. I will use a cog from a ten speed cassette and I think I will have to make the spacer. Thanks for advise.
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