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1983 Univega Gran Tourismo Rebuild HELP!

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1983 Univega Gran Tourismo Rebuild HELP!

Old 02-10-09, 02:36 PM
  #1  
Speedo
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1983 Univega Gran Tourismo Rebuild HELP!

This is a pure mechanical question, but there are enough people here doing these rebuilds that I feel like I might get a better response here than in Bike Mechanics.

I'm rebuilding a 1983 Univega Gran Tourismo. Mostly just upgrading the drive train to 9 speed.

I've already cold set the rear spacing to 135 mm, built up a new set of wheels, and installed the new bottom bracket and crankset. A 118 mm UN54 gives a 50mm chain line with a Sugino XD600 crank. I bought a Shimano Deore front derailleur to handle that 50mm chain line.

Here's the problem: The original derailleur cable routing on this bike goes through a cable guide that is clamped to the downtube near the bottom bracket. It looks like this one which I found at Loose Screws. The rear derailleur cable goes through the guide and along the top of the right chain stay. That will work fine. The front derailleur cable used to go into a cable housing that went above the bottom bracket, around the back of the seat tube and into the original front derailleur housing that was built to handle the cable housing. My new Deore front derailleur is not built to handle a cable housing. It is built to handle the cable coming through a cable guide on the bottom of the bottom bracket and then up parallel to the seat tube.

There does appear to be a Campy cable guide which is intended to solve this exact problem, but it is fifty bucks! This is not intended to be a gold plated build, so before I plunk down $50 for this part, I've been trying to think of alternatives. Here's what I've got so far.

1) Buy the cable guide that goes on the bottom of the bottom bracket, drill and tap the mounting screw hole, and use the newer style routing.

2) Buy the cable guide that is similar to the one I already have, cut off the right hand side guide and mount it upside down on the seat tube. Run cable housing from the original guide to the new guide, and then free up to the derailleur.

Anything else? Are there current derailleurs that handle a 50 mm chain line that accommodate a cable housing cable attachment?

Any suggestions are appreciated.

Speedo

Last edited by Speedo; 02-10-09 at 08:03 PM.
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Old 02-10-09, 03:03 PM
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You could probably find an NIB Suntour derailleur, like the Univega had originally, that would work with the cable guide from loose screws, and that would handle the triple chainrings.
But, one of those plastic guides, and the drilling and tapping on the bottom of the bottom bracket, would be cheaper and let you use the Deore FD.

Before you try choice 2), try mounting the guide you have now in that configuration and see if it works.

Think about adding a chain catcher on the seattube, too; might interfere with 2).
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Old 02-10-09, 04:50 PM
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If possible I would install the plastic guide/bracket on the bottom of the BB housing. If there is not a hole you could drill one and use a self tapping screw.

I just completed installing an XD600 triple with a 105 triple FD. On this bike the cable guide is under the BB and all works great.
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Old 02-11-09, 04:03 AM
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im with the other guys.. the most reliable option would be to install one of THESE under your bottom bracket.

but while i was looking on ebay i found a much cheaper clamp on guide HERE

cheers.
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Old 02-11-09, 08:43 AM
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Thanks to all for the input. I've been convinced. I'll get one of the plastic, under-the-BB, guides and route the cable for the front derailleur that way. I think the bike will have more of a future with the current cable routing scheme.

I still have to route the rear derailleur cable the old way.

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Old 02-11-09, 02:01 PM
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Speedo,

If you need one of the Campy downtube cable guides like this one:




I have a box full of them, all new old stock. Send me a PM and I'll send you one for free. I got them all, I think there were 40 originally for something like $10.00 at a bike shop that closed last year. I've been giving them away ever since.

$50.00 from Loosescrews. That's outrageous!

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Old 02-11-09, 11:53 PM
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I still have to route the rear derailleur cable the old way.
oh, is your cable stop on the upper side of your chain stay above your derailleur? that could be an issue. dude,, you should take Machin Shin up on his offer! what a sweetheart.
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Old 02-13-09, 11:42 AM
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Originally Posted by Machin Shin View Post
Speedo,

If you need one of the Campy downtube cable guides like this one:




I have a box full of them, all new old stock. Send me a PM and I'll send you one for free. I got them all, I think there were 40 originally for something like $10.00 at a bike shop that closed last year. I've been giving them away ever since.

$50.00 from Loosescrews. That's outrageous!

Dan
PM sent. Thanks so much! It's definitely the easy solution, but I couldn't swallow the price tag.

Speedo
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Old 02-13-09, 11:45 AM
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Originally Posted by Beelzebutt View Post
oh, is your cable stop on the upper side of your chain stay above your derailleur? that could be an issue. dude,, you should take Machin Shin up on his offer! what a sweetheart.
Yeah, my plan was to route the front derailleur cable under the bottom bracket and the rear derailleur cable using the old guide along the top of the chain stay. Using that approach I might have had to file down the FD cable stop on the cable guide, but I think it would have worked.

I PM'ed Machin Shin and will take him up on his offer. He is a sweetheart! It's definitely the cleaner way to go.

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Old 02-13-09, 01:05 PM
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I've got an 82 Gran Turismo I've been slowly working on, with similar ideas. I'd love to see updates on how all this worked out when you're finished.
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Old 02-13-09, 01:15 PM
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I've got an 82 Gran Turismo I've been slowly working on, with similar ideas. I'd love to see updates on how all this worked out when you're finished.
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Old 02-13-09, 02:49 PM
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Originally Posted by Aloyzius View Post
I've got an 82 Gran Turismo I've been slowly working on, with similar ideas. I'd love to see updates on how all this worked out when you're finished.
Will do. I'll post some pix.

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Old 06-25-10, 03:29 PM
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so where's the pix?
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