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Can I convert a 127mm to a 130mm rear hub.

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Can I convert a 127mm to a 130mm rear hub.

Old 06-09-07, 06:04 PM
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geo8rge
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Can I convert a 127mm to a 130mm rear hub.

I need to rebuild the rear wheel of my Aluminum Birdy. The Birdy has a rear dropout of 130mm (Shimano Parallax hub), and I don't think there is any give. Can I just add washers to a 127mm Campagnolo hub? I am worried about it not sitting in the fork correctly/safely. Would a bike shop stock 1.5mm washers?
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2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
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Old 06-09-07, 06:16 PM
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First don't assume that 1.5 on each side is the right thing to do. See http://www.sheldonbrown.com/chainline.html to determine where the hub should sit. Other than chainline the concern would be if a q/r hub there needs to be sufficient axle left after you add spacers. The hub locknuts of course need to be outside any spacers. Most shops should be able to come up with the spacers/washers you need.
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Old 06-09-07, 06:51 PM
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That's not much difference. Just mount the wheel and squeeze the drops onto it with the QR.
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Old 06-09-07, 07:15 PM
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I think just a std. flat washer of that size should be pretty close.
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Old 06-10-07, 03:15 AM
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Originally Posted by geo8rge
I need to rebuild the rear wheel of my Aluminum Birdy. The Birdy has a rear dropout of 130mm (Shimano Parallax hub), and I don't think there is any give. Can I just add washers to a 127mm Campagnolo hub? I am worried about it not sitting in the fork correctly/safely. Would a bike shop stock 1.5mm washers?
A couple of questions:

1. What's a Birdy?
2. Are you swapping a Shimano wheel for a Campy?


Parallax is a cassette hub, the only thing Campy made in 126mm, no such thing as 127, was freewheel. I'm thinking you might need to give us a little more information on the project. There are many very knowledgeable people here. They could give you some great advice if you lay the project out in its entirety.


Tim
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Old 06-10-07, 06:00 AM
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Birdy is an aluminum folding bike. I don't want to stress the aluminum rear fork. http://en.wikipedia.org/wiki/Birdy_(bicycle)

Is there a longer replacement axle available for Campagnolo? Is the axle standard?
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2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.
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Old 06-10-07, 09:37 AM
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Originally Posted by geo8rge
Birdy is an aluminum folding bike. I don't want to stress the aluminum rear fork. http://en.wikipedia.org/wiki/Birdy_(bicycle)

Is there a longer replacement axle available for Campagnolo? Is the axle standard?
What kind of Campy hub is it? Is the hub a threaded freewheel type or a later cassette type. Almost all Campy cassette hubs were 130mm. The threaded hubs ranged from 120mm - 126mm. There were aftermarket axles for a freewheel hub that allowed an 8 sp freewheel to fit and were spaced for a 130mm dropout. They flexed real bad because there was no support. It is generally accepted that a 130mm axle in a freewheel type hub is a bad idea.

As I asked earlier, if you explain what you are trying to accomplish there is someone here that can give a better answer. It sounds like you are trying to swap an internally geared hub with a freewheel type from another manufacturer. Campy never made internally geared hubs. Watever it is your doing, it's obvious you don't want to spill the beans. Good luck


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Old 06-10-07, 01:14 PM
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This is the hub set I was thinking of, I hoped to mount a shimano 7 sp freewheel, but could use other freewheel. I do not like the idea of stressing an aluminum bike so I would have to shim the hubs somehow to get them to 130mm. There seem to be campagnolo axles for sale on ebay.

http://cgi.ebay.com/Campagnolo-Super...QQcmdZViewItem
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2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.
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Old 06-11-07, 02:55 AM
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Originally Posted by geo8rge
This is the hub set I was thinking of, I hoped to mount a shimano 7 sp freewheel, but could use other freewheel. I do not like the idea of stressing an aluminum bike so I would have to shim the hubs somehow to get them to 130mm. There seem to be campagnolo axles for sale on ebay.

http://cgi.ebay.com/Campagnolo-Super...QQcmdZViewItem
I have a set of NR hubs on Mavic CXP-30 rims. They are beautiful wheels. Freewheels are a Pain in the *ss to service and remove though. You probably won't find a nicer set of hubs.

If you are swapping an internally geared Nexus for a freewheel you sound like your making a lot of other changes also. Does that mean your adding derailleurs and new shifters also? Why not just use a hub with a Shimano 8, 9 or 10 cassette hub. They are already spaced at 130mm and Shimano cassettes are way cheaper than Campy. Because you're dumping the Nexus for a freewheel/cassette you are no longer bound to use a 7 speed either.

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Old 06-11-07, 09:07 AM
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The current wheel has a parallax hub (mid level shimano). I was considering the nexus. I am happy with the gearing, which is good for touring. Mostly I do not want to spend hours getting the 127 mm to fit in 130 mm drop outs.
__________________
2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.
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