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1984 Trek 720

Old 05-11-20, 05:32 PM
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marius.suiram 
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1984 Trek 720

What's the value of this Trek 720.
The top tube is rusted.
Should it worth a repaint or not?





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Old 05-11-20, 05:47 PM
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Even having just the top tube repainted will put you upside down, value wise, on this. Not much original left on it either. Hope it's REAL cheap. Unless you plan on keeping it for yourself, the price would have to almost free to validate spending the money on a partial repaint.
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Old 05-11-20, 10:33 PM
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Frankenbike..........
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Old 05-11-20, 10:48 PM
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I once bought a Trek 760 with rust around the cable guides. It was pretty cheap, but wire brushing and scraping the rust revealed that it was rusted all the way through the top tube in several places. Trying to save whatever I could, I broke the fork attempting to remove the stuck the Cinelli stem. I did save the dropout adjuster screws, though. And a few other pieces.
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Old 05-12-20, 06:48 AM
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Ugh. What a hot mess. Check for fork front-end collision damage, too.
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Old 05-12-20, 09:41 AM
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Originally Posted by StarBiker View Post
Frankenbike..........
+1 - At minimum, rear mech, crank, shifters, brake levers and obviously handlebar have been swapped. Those stem shifters are something from a gas-pipe bike. Iconic original blue Blackburn rear rack is long gone. As suggested, this could be a good project, but only if it could be had for a "rescue" price.

Nickel says this bike was on a trainer, and the top tube rust is from sweat.
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Old 05-12-20, 10:16 AM
  #7  
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Originally Posted by marius.suiram View Post
What's the value of this Trek 720.
The top tube is rusted.
Should it worth a repaint or not?

What is the asking price?

The 720 is a rare bird even in so-so condition.

The brakes appear to be original - can be cleaned/polished - put some new Kool Stops on - very nice. Those particular canti brakes have several adjustment features that make it easier to get them to function properly. The crank also appears original. It's a nice triple that is set up for half-step. If you're not into half-step you can replace the middle ring with a 38 or 39 tooth TA for about $50 - clean/polish and you're good if the teeth on the other rings are ok. The FD and RD may also be original and suitable for re-use.

If it were mine I would replace the shifters, bars, seat, all cables, all bearings (except possibly the headset bearing) and wheels with something more suitable - would consider converting to 9 or 10 speed rear.

I share the concern of others about the top tube - that is very rusty - but if sound this bike is absolutely worth a re-paint.

The fork might be fine - photos can be misleading - but that is something to check closely - and look for any subtle wrinkles in the top tube and down tube near the front lugs - might indicate a collision. Also, check to see if the seat post is stuck - that can be a real problem.

If you can pick it up for low $$ you might be able to resell it on this site for the same or maybe a bit more than purchase price. This bike is worth saving even if you are not the one who does the rehab. Get the serial # for full verification. It does look like a 1984 720 in the 22.5" size.

https://www.vintage-trek.com/images/...ek3Touring.pdf


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Old 05-12-20, 10:31 AM
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oh man! it does look pretty beat up but it is also a 36 year old bike and seems to still have original parts. That said, makes me feel a to better about the lucky find i had when i came across my '83 trek
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Old 05-12-20, 03:08 PM
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I checked the s.n. before I went to buy it.
The seat post is not stuck.
No damages as accident.
Brakes are original, crank is original, but scratched.
Deore DX derailleurs
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Old 05-12-20, 04:18 PM
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Originally Posted by madpogue View Post
+1 - At minimum, rear mech, crank, shifters, brake levers and obviously handlebar have been swapped. Those stem shifters are something from a gas-pipe bike. Iconic original blue Blackburn rear rack is long gone. As suggested, this could be a good project, but only if it could be had for a "rescue" price.

Nickel says this bike was on a trainer, and the top tube rust is from sweat.
Yep. I have had a couple aluminum Treks with this issue.

This bike had a hard life in Cleveland.......

Shame, this is a desirable Trek. Just not as much as it once was. Especially this one.
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Old 05-12-20, 05:31 PM
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Originally Posted by marius.suiram View Post
I checked the s.n. before I went to buy it.
The seat post is not stuck.
No damages as accident.
Brakes are original, crank is original, but scratched.
Deore DX derailleurs
Then you've got a nice starting point for a frame-up project.

What are your plans?
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Old 05-12-20, 06:20 PM
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Originally Posted by jlaw View Post
.... wheels with something more suitable
What's not "suitable" about what appear to be the original wheels? Granted, Maillard hubs aren't exactly box-office popular, and the Helicomatic certainly gets its share of criticism. But they'll be fine as long as they last, and those Matrix anodized rims are a favored Trek hallmark.
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Old 05-12-20, 07:01 PM
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Originally Posted by madpogue View Post
What's not "suitable" about what appear to be the original wheels? Granted, Maillard hubs aren't exactly box-office popular, and the Helicomatic certainly gets its share of criticism. But they'll be fine as long as they last, and those Matrix anodized rims are a favored Trek hallmark.
..just not a fan of 27" - limited tire choices and going 27" usually means 6 speed which I find so-so.

However, I did rebuild a set of VGC 27" Titans from a 1984 620 - replaced the Helicomatic rear hub with a Maillard that had an identically-sized housing and 1/4" bearings - going to use these on a mostly-original rebuild of the 1985 620 I have, including the original 6 speed and buttery Huret DT shifters. This will be my first experiment with 27" wheels - maybe I'll change my mind. ?

I bought a set of silver H Plus Son Archetype 700c wheels for the 1984 620 - the silver should look pretty sharp with the other silver components.
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Old 06-09-20, 01:08 PM
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I have an '84 760 and considering selling it. Pretty good shape with only a little rust on the toe clips and brakes. Sun tour superb group. Original except for seat handle bars and wheels. I have the wheels but not on the bike now. 54cm
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Old 06-09-20, 02:31 PM
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If the price was right I would take that on as a keeper project. looks about my size.
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Old 06-10-20, 05:16 AM
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Not sure of reasonable price on 760

I am not even sure of a reasonable price for a decent shape mostly original '84 760 with new wheels.
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Old 06-10-20, 12:28 PM
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Originally Posted by sloar View Post
If the price was right I would take that on as a keeper project. looks about my size.
Are you talking about my bike, or about the 760, 54 cm bike?
If you are interested in mine, you can pm.
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Old 06-10-20, 01:39 PM
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Cycslistsj You should start a new thread on your 760 (race geometry). Much different bike than a 720 (touring geometry).
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Old 06-10-20, 02:47 PM
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Thanks. Sorry about that. 1st time user and still figuring it out. Still trying toto figure out how to start a new posting and a new thread. Thanks for the heads up and sorry for the inconvenience.
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Old 06-10-20, 03:31 PM
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Originally Posted by Cycslistsj View Post
Thanks. Sorry about that. 1st time user and still figuring it out. Still trying toto figure out how to start a new posting and a new thread. Thanks for the heads up and sorry for the inconvenience.
Navigate to the applicable sub forum - "Classic and Vintage' for example - and you will see a 'New Thread' button (see image below).


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Old 06-16-20, 05:26 AM
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If I thought the frame was salvageable, and I wanted this bike as a rider, I'd pay $100. If the the rust is cosmetic and the frame and fork straight, putting a $150 into paint or powder coat , would get you a $250 frame for $250. If you put another $150 in appropriate components and consumables, you might have $400 into a bike worth $500. I have a 728 in the garage that is in better shape, with original components, Bruce Gordon Racks and panniers ect,ect, but its same economy, not being worth much, except I could just continue adding to the 20 years of nail polish touch up and ride it around. Your bike is raw project material, and realy needs paint, so unless you want a project....
You could abrade and neutralize the rust and rattle can the bike primer black and ride it like you stole it, but thats a lot of work for a halfway solution.

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