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Old 12-16-12, 12:56 PM   #1
Tulok
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Trek 720 Multi-traack

I'm looking to pick up a 1990 trek multi-track 720, it has canti's and a triple.

My question is, how fat of a tire can I fit into the frame there (it came with 700x35), and will the frame hold up to gravel roads and smooth singletrack/washed out double track?

I've got a rigid aluminum trek su-200 but it is heavier than heck and the 26" wheels don't roll well compared to 700c imo. I've also got a real road/racing bike, and a "real" suspension MTB, but I feel this will be a fun cheap way to have simple fun.
Any input?

Last edited by Tulok; 12-16-12 at 01:05 PM.
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Old 12-16-12, 05:28 PM   #2
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I've got a 1995 730 Multitrack and the technical manuals says the max tire clearance is 41mm. I suspect it will take a bit more than that. It had fairly fat 38mm tires on it when I bought it and there was still plenty of clearance.

The bike is designed for riding on pavement and hard packed surfaces so for your purposes, it should be good.

These are 38mm Specialized Armadillo Nimbus tires:

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Old 12-17-12, 11:58 AM   #3
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cool, thanks for the help! You'rs looks pretty nice
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Old 12-17-12, 12:50 PM   #4
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Originally Posted by Tulok View Post
I'm looking to pick up a 1990 trek multi-track 720, it has canti's and a triple.My question is, how fat of a tire can I fit into the frame there (it came with 700x35), and will the frame hold up to gravel roads and smooth singletrack/washed out double track?
I've got a rigid aluminum trek su-200 but it is heavier than heck and the 26" wheels don't roll well compared to 700c imo. I've also got a real road/racing bike, and a "real" suspension MTB, but I feel this will be a fun cheap way to have simple fun.
Any input?
Hi,

I have a vintage '90 Trek 720 Multi-Track. I'm just getting back to riding it again - stayed away way too long. You might want to email Trek or call

TrekBontrager_Consumer@trekbikes.com

WilliamRand | Trek Bicycle Corporation |Technical & Customer Services Representative | 801 W. Madison St, Waterloo, WI 53594 | 920.478.4678

Good luck.


click picture to enlarge. (notice I'm not a purist)



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Old 12-19-12, 06:00 AM   #5
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A true classic,,,,,,,nice find
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Old 12-19-12, 08:32 AM   #6
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I was lucky to get a similar bike (Trek multitrack 750) for my son when he was ready for an adult size bike. I felt really happy to get it and thought I might like a ride or two on it myself. He likes it a lot but thinks his sisters (Trek 7.1 FX) is sportier looking, and it is ... these pics are from when I just got both before cleaning & adjusting them and adding rear racks for our summer jaunts to the beach, etc. Both bikes should last them a long time.
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File Type: jpg 750 bike.jpg (82.2 KB, 88 views)
File Type: jpg trek 7-1FX.jpg (100.0 KB, 73 views)

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Old 12-19-12, 10:30 AM   #7
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Originally Posted by rumrunn6 View Post
I was lucky to get a similar bike (Trek multitrack 750) for my son when he was ready for an adult size bike. I felt really happy to get it and thought I might like a ride or two on it myself. He likes it a lot but thinks his sisters (Trek 7.1 FX) is sportier looking, and it is ... these pics are from when I just got both before cleaning & adjusting them and adding rear racks for our summer jaunts to the beach, etc. Both bikes should last them a long time.
Based on my experience with the 730 and the Trek 7.2 FX I owned, the 750 is a much better bike in that it has higher level components. Don't tell your daughter that, though.

I consider a 750 to be great find. Double-butted True Temper cro-moly frame & fork, made in the U.S.A. back when TREK was the go-to brand for bicycling enthusiasts.

In my experience, the FX models ARE more sporty in their appearance and in their ride.
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Old 12-19-12, 12:08 PM   #8
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oh thanks, I'll share that with my son only ... thanks for sharing!
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Old 12-25-12, 08:59 PM   #9
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I got my 700c x 40 Schwalbe Duremes today and mounted on Velocity Dyad 25mm rims, their actual measurement is 38mm wide. On my 730 there is still quite a bit of room. The only issue might be a bolt on the back of the front derailleur. If not for tha bolt, the frame would accomodate much fatter tires, I believe. Maybe even Schwalbe Big Apple 50's.
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Old 01-18-13, 09:54 PM   #10
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So am I to understand that the Trek 720, 730, and 750 have enough clearance for 700c wheels & tires? Is there somewhere I can find a comprehensive list of models able to take 700c tires? I've been searching Craigslist non-stop for a nice steel mountain bike or hybrid that I can turn into a 'monstercross', so to speak. I've looked at every Trek, Specialized, GT, and Bridgestone out there, but can't seem to make up my mind or find a bike that I have to have. Thanks for any input!
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Old 01-18-13, 10:45 PM   #11
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converting a 26" bike that uses cantilever or v-brakes to 700c, the brakes are about 6mm too low to reach the rims properly. you're much better off starting with a 700c aka 29er frame.

check out the Surly Ogre for some evil ideas.
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Old 01-18-13, 11:08 PM   #12
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I don't have any experience with "monstercross" tires but the Multitracks will easily take tires into the 40mm range. Once you start talking knobbies.....I'm not too sure.

I pulled both of these images from the internet. The blue bike was described as a mid-90's Trek Multitrack frame and the black one an early 90's Trek 750 (there may have been some geometry differences between the early 90's and mid-to-late 90's models).



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Old 01-21-13, 10:37 AM   #13
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The blue bike above is exactly what I'm after. I'm not concerned about putting knobbies on it, I have my Soma Groove if I need to do any serious off-roading. Would you happen to have link to where you found the blue bike online, so I can try to find more details? Thx...


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I don't have any experience with "monstercross" tires but the Multitracks will easily take tires into the 40mm range. Once you start talking knobbies.....I'm not too sure.

I pulled both of these images from the internet. The blue bike was described as a mid-90's Trek Multitrack frame and the black one an early 90's Trek 750 (there may have been some geometry differences between the early 90's and mid-to-late 90's models).



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Old 01-21-13, 11:48 AM   #14
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Originally Posted by mikehall View Post
The blue bike above is exactly what I'm after. I'm not concerned about putting knobbies on it, I have my Soma Groove if I need to do any serious off-roading. Would you happen to have link to where you found the blue bike online, so I can try to find more details? Thx...
that bike looks rather heavily customized, using bitsa-this and bitsa-that. bikepedia suggests that trek 730s or whatever from the mid 90s were 3x7 geared, using Alivio type groups, adn they had flat bars and 700x38 tires. that blue bike sure doesn't look like its got a threaded 1" headset, either, so its been modded quite a bit.
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Old 01-21-13, 11:56 AM   #15
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these are cool with drop bars
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Old 01-21-13, 11:57 AM   #16
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It was this blog: http://fortyonethirty.blogspot.com/2...1_archive.html

I have two 730's and they come with 1" threaded forks but 1" threadless forks will work. BB shell is 68mm, chainstays are 43cm, seat-tube angle is 73, head-tube angle is 71.5, bottom bracket drop is about 60mm, fork rake is 40mm (yielding a very stable trail measurement of 74), drop-outs are 135mm, seatpost 27.2.

Tire clearances is pretty high as mentioned in my first post. This is my bike with Schwalbe Dureme 40's and there is room to spare:

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Last edited by corwin1968; 01-21-13 at 12:04 PM.
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Old 03-13-14, 09:15 PM   #17
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The blue bike above is exactly what I'm after. I'm not concerned about putting knobbies on it, I have my Soma Groove if I need to do any serious off-roading. Would you happen to have link to where you found the blue bike online, so I can try to find more details? Thx...

Blue bike is exact bike on working on right now . Ill post pics when im done .
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