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-   -   Trek 520,620,720? (https://www.bikeforums.net/classic-vintage-bicycles-whats-worth-appraisals/742549-trek-520-620-720-a.html)

hobbitman 06-10-11 05:21 PM

Trek 520,620,720?
 
1 Attachment(s)
I located this Vintage Trek Touring frame a few weeks ago at a pawn shop and just picked it up today for 50 bucks. The frame measures 21 inches from the center of the crank arm to the top of the seat tube which strikes me as odd as the standover height is shorter than my supposedly 50cm bike that I currently ride(but I'm also a noob so correct me if I did it wrong.) I looked at the catalog at a vintage trek site but couldnt find one that matched component wise. This bike has the following:
Suntour Vx front and rear derailleurs
Avocet Touring I Saddle
Sakae Road Champion Drop Bars
Dia Compe Brake Levers
Custom(brand name on it) Cranks
Matrix Wheels
Bar End shifters

If someone could help me figure out which model this is and possibly the year that would be great. Also ballpark value fixed up would be good. Considering just selling the frame since its too small for me or my wife and keeping the components for my current steed, but if its worth a decent amount i'll spend some money fixing it up then sell it.

Beach Comber 06-10-11 05:40 PM

Its been modified over the years. Even the color looks unfamiliar. It also does not appear to be a touring frame, but more likely just a sport geometry. See if you can find a serial number on the frame - that will help nail it down.

Trek measures center to center (ctc) so your ctt 21" does correspond to a 52 cm frame.

hobbitman 06-10-11 06:13 PM

The color is sort of a dark grey pearl in good light..it looks almost blue in low light..center of bb to center of toptube is ctc correct?..ill get a serial number tonight

Beach Comber 06-10-11 06:39 PM

It did look bluish in your picture. If its a metallic gray, it might be original. I'm not seeing the traditional Trek decals though.

tugrul 06-10-11 07:13 PM

Check the serial number against vintage-trek.com

hobbitman 06-10-11 11:35 PM


Originally Posted by tugrul (Post 12770922)
Check the serial number against vintage-trek.com

I Checked my serial number against the L N L N L N N method listed on vintage trek and it seems my bike is a 21" frame made in january of 1980..i dont have the model number as the first letter is not visible and the first number was barely visible. It is stated on the site that this is a common issue. I'm not sure if it helps anything, but this bike has the mounting holes for fenders and/or a rack. This bike is also a twelve speed as it has 6 rear cogs. If anyone has any thoughts as to the model that would help.

wrk101 06-11-11 05:11 AM

Measure geometry. Once a bike gets repainted and the components changed, what it is, is no longer what it was. The geometry on the touring bikes was different, and is listed in the catalog. IDing a bike whose components have been changed, and with its decal and paint removed, is challenging.

But to your original list, it is kind of easy. It is none of those models, as Trek did not make any of them in 1980. Road bikes were the 410 series (412 or 414, I have had a lot of them). Also had a high end 730 and 930 road bike. 510, 710 and 910 were the touring models.

A tape measure will tell you which configuration it has, if it is a touring model, it will not tell you which one. Disassemble and look for a possible mark on the fork crown if you have to know, most are marked (not with Trek model, but with the tubing brand).

auchencrow 06-11-11 06:54 AM

With chainstays as long as that, I believe you have a touring model -probably a 510, 710 or 910 as Thrifty Bill suggests.
Sans decals, my guess is that it is indeed a repaint, and thus the value is much diminished to its utility value.

- And I hate to be the one to bring this up but that fork looks a little tweaked to me. Could be the viewing angle though.

Beach Comber 06-11-11 07:23 AM

Actually, lt looks like stay length was the same for 412 and 414 as the 510, 710, and 910. The difference primarily being the tubing and the head angle. While I hope you scored with a 531 or Columbus frame, more realistically you have a 1980 412 or 414. The primary difference being the components. For the components you still have, the big difference would be the crankset, which for those two models, is pretty minor.

http://www.vintage-trek.com/images/t...0Trek3_150.jpg

If it were me, I'd restore it to an original color, decals, and components. You won't make any money out of it, but when done, it wiil be a nice, solid, bike.

EDIT: This even looks like your color:

http://www.vintage-trek.com/Trek_galleryTF414.htm

hobbitman 06-11-11 10:08 AM


Originally Posted by auchencrow (Post 12772330)
With chainstays as long as that, I believe you have a touring model -probably a 510, 710 or 910 as Thrifty Bill suggests.
Sans decals, my guess is that it is indeed a repaint, and thus the value is much diminished to its utility value.

- And I hate to be the one to bring this up but that fork looks a little tweaked to me. Could be the viewing angle though.

Yeah its just the angle..I though so too but on closer inspection its fine..well.thanks for the replies..this one may just get refreshed and ridden..the standover thing is odd but it isn't uncomfortable to ride..so ill just keep it

wrk101 06-11-11 10:18 AM

While I have found one 1980 710 over the years, I have found many 412s. There are a lot of them out there.


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