Shimano hub with 8 speed campagnolo spacing

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garygkn
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Shimano hub with 8 speed campagnolo spacing

Postby garygkn » 19 Jun 2010, 1:24pm

I am searching for an 8 speed Campagnolo hub but they seem scarce.
Is there a work round?
I have some Ultegra wheels I think they are 9/10 speed hubs.

I found this whilst searching for info:

http://forum.bikerag.com/viewtopic.php?f=9&t=12256



This is possible, but you need a couple things:
1. New Shimano 8 speed cassette (recommend the Ultegra)
2. New 8 speed chain (SRAM 8 speed with masterlink is good)
3. Cassette spacer conversion from Quality Bike Parts (your LBS should have this in their catalog) for the Shimano to Campy conversion.

Once you have all this stuff you just install the new spacers, put on the new chain, lube and adjust, and ride into the sunset.

I know that this works well because I used to race a similar setup on a pair of Mavic Classic Pros that came with a Shimano only compatible spline for the 8 speed. It worked great, and continues to up until the present day.

As an aside, you may want to stock up on these parts because 8 speed stuff is getting pretty tough to find. I had to source a Campy cassette last spring when the drivetrain got all and skippy and it was a tough thing to do. Ultimately Nashbar had it but it was a pain.

Good luck!



mattsccm
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Re: Shimano hub with 8 speed campagnolo spacing

Postby mattsccm » 19 Jun 2010, 7:24pm

I might have a 32 hole Campag Avanti hub. ie bottom of the range and got to be 10 years old but with maybe 100 miles.

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CREPELLO
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Re: Shimano hub with 8 speed campagnolo spacing

Postby CREPELLO » 19 Jun 2010, 7:44pm

You may have some success altering the cable clamp on the rear mech for the correct amount of pull. Highpath engineering have a useful page on pull ratios and clamp modding HERE. Modern Shimano freehubs (except Dura Ace) will still accept Shimano 8 speed cassettes. So with the Ultegra hub a little re-alignment at the clamp of your mech should do it.

garygkn
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Re: Shimano hub with 8 speed campagnolo spacing

Postby garygkn » 19 Jun 2010, 8:37pm

Golly looks like a Shimano 7 speed is the same space as a Campag 8 speed.

MartinC
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Re: Shimano hub with 8 speed campagnolo spacing

Postby MartinC » 21 Jun 2010, 3:05pm

Gary, yes this is right. Campag 7 and 8 and Shimano 7 were all 5mm spacing. So you could run a 7 speed Shimano hub and cassette on your Campag transmission (with 1 less gear of course).

garygkn
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Re: Shimano hub with 8 speed campagnolo spacing

Postby garygkn » 21 Jun 2010, 3:17pm

Cheers I will keep looking for a suitable hub but if it looks impossible I will do the work round.
Recycling is not a word I would now associate with drive train compatibility.
When will the powers that be upgrade equipment every 6 months?

hamster
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Re: Shimano hub with 8 speed campagnolo spacing

Postby hamster » 21 Jun 2010, 11:48pm

You can also make a Campag 8 speed cassette from a 9 speed one provided you have the spacers from an old Campag 8 speed cassette. These will then fit onto the later 9/10 speed hubs.

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fenderbender
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Re: Shimano hub with 8 speed campagnolo spacing

Postby fenderbender » 8 Aug 2011, 11:31am

Hi! May I resurrect this thread as I have a similar Q and in dire straits:

Have a set of Campa 8-speed Avanti Ergopower brifters I'd like to use with a 9-speed hub and a re-spaced 9-sp cassett. I have tried to respace the cassett by loosing the inner cog and fitting a Shimano inner spacer in it's place. I've placed extra cut out beer can aluminium spacers between each cog. So it's shifting fairly well now but still skipping a cog on each run up and down the gears.

- Anyone have a clue how to get it to shift better?
- Should I ad or redistribute the beer can spacers?
- Does it matter that I'm using a Shimano RD-1050 7-sp short rear derailleur?

Much obliged! /Pete
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CREPELLO
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Re: Shimano hub with 8 speed campagnolo spacing

Postby CREPELLO » 8 Aug 2011, 11:47am

Beer can spacers - blimey :o Not come across that one before. You could try sourcing thinner beer cans, as you say it's skipping a gear, which implies the spacing is too wide.

May I suggest that you put a request out for an expired 8 speed cassette for doner spacers (in the Wanted forum)

MartinC
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Re: Shimano hub with 8 speed campagnolo spacing

Postby MartinC » 8 Aug 2011, 12:20pm

Your post doesn't make it clear what type (Campag or Shimano) of 9 speed cassette you're trying to respace, nor what sort of hub you're trying to use (Campag 8 speed, Campag 9/10/11 speed or Shimano). Without knowing this it's hard to know what choices you have.

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fenderbender
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Re: Shimano hub with 8 speed campagnolo spacing

Postby fenderbender » 8 Aug 2011, 12:50pm

Sorry, I'm using a 9sp Campa cassette and hub.
As it's over shifting isn't it more likely that an extra alu-spacer is needed?
Would try it if I had more beer at home to empty.. :wink:
Reason for all this is that a friend have asked me to put together a cheep 'commutour' from what's left in my parts bin as his got nicked recently. Have been trying loads of different set ups and except a 7sp Shimano hub/cassette, this is what's working best so far.

Edit: I have read the articles by Sheldon Brown and Chris Juden but it's of little help as I don't have a accurate tool to measure thickness and distance to a 1/10 mm.
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CJ
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Re: Shimano hub with 8 speed campagnolo spacing

Postby CJ » 8 Aug 2011, 1:06pm

fenderbender wrote:Does it matter that I'm using a Shimano RD-1050 7-sp short rear derailleur?

Matter? It's crucial!

When you shift a Shimano mech with Campag shifters, the mech shifts further than the Campag mech those Campag the shifters are designed to work with. There are a few lucky combinations, like if you have 10-speed Ergopowers the Shimano mech nicely shifts a Shimano 8-speed cassette. But if you shift it with 8-speed Ergos, I'm afraid it will go even further per click than the 5.5mm spacing between old 6-speed sprockets.
Chris Juden
One lady owner, never raced or jumped.

MartinC
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Re: Shimano hub with 8 speed campagnolo spacing

Postby MartinC » 8 Aug 2011, 1:33pm

Fenderbender, the only sprockets that will fit on the hub are Campag 9/10/11 speed ones. As Chris says - spacing these to work with 8 speed ergos and a Shimano mech will be quite a challenge - there's no commercially available solution to this that I know of. You'll need to custom build a set of spacers or see if there's some weird combination of spacers and shift ratio adjustment (Shiftmate or Hubbub) that will do the trick. Not easy.

It's not a fruitful mix to improve either. Replacing the Ergos with friction shifters would be the cheapest way. Otherwise you need to change at least 2 of the shifter, mech, hub and cassette equation.

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fenderbender
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Re: Shimano hub with 8 speed campagnolo spacing

Postby fenderbender » 8 Aug 2011, 1:35pm

Chris & Martin, thanks for the tip!
Any possible diy treatment you recommend?
Should I try adding a couple more spacers?
Come to far to back down now! :wink:
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fenderbender
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Re: Shimano hub with 8 speed campagnolo spacing

Postby fenderbender » 8 Aug 2011, 1:41pm

Chris, would a Dura Ace / Hubbub wire rout modification lessen the travel of the rear mech?
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