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1979 Trek 710 Project

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Old 03-09-18 | 08:06 AM
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Thanks everyone. I will probably retain the TA crank.
[MENTION=20548]JohnDThompson[/MENTION] have you seen the "REK" seat stay before?
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Old 03-09-18 | 08:16 AM
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Originally Posted by jetboy
yeah i was like: is it like in stamps? is it now worth 10,000$ because its the super rare missing T frame?
Heh. Instead of the 1955 "bugs bunny" half dollar, its the 1979 missing "T" Trek. That half dollar brings back fond memories of my dad's coin collection...

Back OT. Great score on the Trek. The Phil hubs should last longer than all of us with maybe a bearing change or two...

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Old 03-09-18 | 10:04 AM
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Originally Posted by Shrevvy
[MENTION=20548]JohnDThompson[/MENTION] have you seen the "REK" seat stay before?
No. I'm surprised it wasn't caught before it landed on a frame.
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Old 03-09-18 | 10:46 AM
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nice bike man!
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Old 05-07-18 | 07:38 AM
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Bikes: 77 Trek TX900, 81.5 Trek 950, 83 Trek 970, 84 Schwinn Peloton, 88 Schwinn Premis, 85 Pinarello Montello, 88 Lemond Pro, more...

I'm building this one back up. I rebuilt the headset yesterday, which is the first I have ever done. I was a bit hesitant as it always sounded difficult, but it went pretty well. It took a few tries, but the steering feels really smooth now. I also discovered a neat tag in the head tube. Many of the components had a "ST" stamp on them - crank arm, crank rings, rear derailleur, hubs, rack and others I am probably forgetting. When I looked down the head tube, I saw a label with the name "Scott Thomas." I assume he was the originally buyer and stamped all the components with his initials. It's pretty neat to know that most of these components have likely been together for nearly 40 years. Maybe the front derailleur was replaced at some point as it does not have the "ST" stamp.

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Old 05-20-18 | 03:13 PM
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Bikes: 77 Trek TX900, 81.5 Trek 950, 83 Trek 970, 84 Schwinn Peloton, 88 Schwinn Premis, 85 Pinarello Montello, 88 Lemond Pro, more...

Here's a pic as the bike comes back together. As I mentioned above, this is the first time I am attempting a "build" (although, I'm mostly just taking parts off, cleaning them and putting the back on - not really a build). Any comments or tips would be helpful. I know I need them.

A few things have changed since I received this through ebay. The rear rim was bent. The LBS said it couldn't be saved. The rear hub was 120 mm, but when I measured the rear spacing on the frame it was 124 mm. I thought I wanted to change to 700c wheels from 27" anyway. I had a Campy wheelset from a Trek 700 (too big) that I used. The 710 had short reach Suntour Superbe brakes. The rear reached, but the front did not. That same Trek 700 that donated the wheel set also had a set of long reach Suntour Superbe calipers. I retained the short reach at the rear and the used the long reach on the front (I have another frame that is the exact opposite - long in the rear and short in the front. I got two working sets out of these brakes). So, the 710 has gone from a 27", 120 mm, 5-speed to a 700c, 126 mm, 6-speed. I still have the Phil Wood hubs. I would have liked to keep them with the bike. With 124 mm rear spacing, it would seem to make more sense to go 126 mm than 120 mm?

New cables, housing and bar tape have been added. The cables are installed, but not yet adjusted. This was also my first time taping the bars. I had to unwrap it a couple times. I would say the result is somewhat serviceable, but it could be a lot better. Maybe I'll try re-wrapping them again, but I was ready to move on. I installed new hoods. It took me waaay too long and a youtube search to figure out how to install them. I used rubbing alcohol to lubricate them enough to get over the brakes. That was a hour or so of learning. I could not get the hoods over the brakes without the alcohol.

Here it is so far.

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Old 05-20-18 | 03:29 PM
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Very nice, I would have never come up with that blue btw but it looks great
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Old 05-20-18 | 03:39 PM
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Looks great so far.
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Old 05-20-18 | 04:01 PM
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So glad you kept the t a crank. I have one and a vo knockoff as well. You can go triple but I usually go wide double with them. 26 for your small makes it so you can have a relatively tight cassette/freewheel and still have a great climbing gear. You make me want to revisit 1980.
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Old 05-20-18 | 07:28 PM
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+1 The light blue is a nice color accent. Looking good!
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Old 05-20-18 | 10:05 PM
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I think that looks really sharp, and what a stroke of luck that your brake reach needs are met on two bikes by swapping the calipers. Really like it so far!
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Old 06-20-18 | 08:09 PM
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From: NE Ohio

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I (somewhat) finished it this evening. As I mentioned above, this is the first time I have tried to do this much on one bike. I am slow and the bike sat for weeks without being touched. I took it once around our 3/4 mile block to see how it ran. First, it felt lighter and quicker than expected. It tracked completely straight riding no hands. It shifted through the gears easily, although it was a little slower shifting into the smallest cog. However, the chain rubs the front derailleur when in the small ring starting with the fourth cog. It was progressivly worse in the 5th and 6th (smallest) cog. Even in the big ring, the chain would rub slightly when shifted into the two smallest cogs. I'll look through my maintenance books to troubleshoot shifting to the smallest cog and the FD chain rub. In the meantime, let me know if anyone has a suggestion on how to correct that.

I wish we had a co-op or bike shop in town. I would love to take a maintenance class or something similar.
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Old 06-20-18 | 08:35 PM
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Sounds like some limit screws need adjusting?
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Old 06-20-18 | 08:42 PM
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For a slow shift to the smallest cog, I would think that a half turn (or more) of the barrel adjuster would fix that, if it has one. The rubbing problem is probably the high limit screw, as mentioned. When in the small chain ring though, you will (as far as I know) have to trim the front derailer a bit if you're shifting into the smaller cogs.

Edit: Actually, scratch the whole barrel adjuster thing, that's more for indexing. It's probably just the high limit screws on both the rear and front derailers.

Last edited by diomekes; 06-21-18 at 09:00 PM.
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Old 06-23-18 | 07:03 PM
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The high limit screw is adjusted as much as possible. Any further movement out and the chain jumps off the big ring. There is still chain rub when in the big ring and the two smallest cogs. Could the FD be bent? Is there something else I should check?
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Old 06-23-18 | 08:41 PM
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Have you checked your chain line? Sounds like the crank is positioned too close inboard. A spacer under the drive side B.B. cup?
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