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Fatter Tires and Front Suspension Fork for Older Trek 730 Multitrack?

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Fatter Tires and Front Suspension Fork for Older Trek 730 Multitrack?

Old 04-08-10, 03:24 PM
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Ludeykrus
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Fatter Tires and Front Suspension Fork for Older Trek 730 Multitrack?

Howdy all,

Lately, I've been considering making my 94 Trek 730 Multitrack a bit more trailworthy. I know it's not a mountain bike and I'm not trying to make it one. I do take it on some light to moderate trails in my area, and it's not bad, considering I can't justify buying a dedicated mountain bike.

I'm new to modifying bikes, so I was wondering what it would take to toss a cheapish front shock fork on? Also, if anyone knew the biggest 700c tire I could fit on it? I'm running the 35's at the moment.
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Old 04-08-10, 07:08 PM
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I run 40's on my multi-track. Ritchey Speedmax. They fit just fine. I think the only thing that would limit you to that size would be the cross brace for the rear chain stays.
For the front fork I think you would have a hard time finding a suspension fork with a 1 inch steerer that supports a 700c tire. But you never know.
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Old 04-08-10, 07:14 PM
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The 35 on the front should be fine; but a 40 on the rear will make a big difference in ride quality.

As a matter of fact, the 35 won't compromise ride quality, but will offer better handling and quicker steering. The 40 on the back, will offer a better ride, and increased capacity.
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Old 04-09-10, 11:16 AM
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I investigated a new fork, but even with a 1 1/8 tube, I'd have to go to a front disc brake. Apparently 29er suspension forks w/ V-brake bosses are not offered anymore (exc custom or big dollar forks).

All in all it would easily push me to at least $350 to convert it. No thanks.

If I like the trail riding, maybe I'll invest in a new, cheaper 29er and move my better hybrid's components over to it.

I'm also curious about a Thudbuster seatpost, although that won't do much for my arms. Might save my back though.
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Old 04-10-10, 01:33 PM
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Originally Posted by joemastro View Post
I run 40's on my multi-track. Ritchey Speedmax. They fit just fine. I think the only thing that would limit you to that size would be the cross brace for the rear chain stays.
Would you happen to have a rough estimate of how much clearance you have at the closest point with the 40's? Think you could squeeze in some 42's or 45's? I found a pair of very cheap Kendas ($9.99/pair) that seem like they would fit the bill nicely:

https://www.benscycle.net/index.php?m...6&currency=USD


Originally Posted by Slee_Stack View Post
I investigated a new fork, but even with a 1 1/8 tube, I'd have to go to a front disc brake. Apparently 29er suspension forks w/ V-brake bosses are not offered anymore (exc custom or big dollar forks).

All in all it would easily push me to at least $350 to convert it. No thanks.
Well after burning some time researching, I came across this link, which seems to suggest a way of making it work...cheaply:

https://archive.mtbr.com/09/0EE85080.php

From reading that link, I'm thinking using this fork ($94.49):
https://bikeusa.com/product/rst-neon-...k8089-qc55.htm

With this steerer tube, cut down and rethreaded or just shimmed to hell (I don't know the length I need, yet...) ($16.49):
https://bikeusa.com/product/rst-steer...k7855-qc55.htm

Now, I don't know what's needed to get the brakes sorted out. That original instructional link suggests a cantilever brake hanger, but I don't see that. I do see this threaded steerer brake cable hanger ($5.50):
https://bikeusa.com/product/dimension...r1214-qc55.htm

But I would need more than that to properly hang the brakes, right? Seems like a cheap solution may not be that far out, but I'm just don't know enough about this stuff yet to say for sure.
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Old 04-11-10, 07:17 PM
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Would you happen to have a rough estimate of how much clearance you have at the closest point with the 40's? Think you could squeeze in some 42's or 45's? I found a pair of very cheap Kendas ($9.99/pair) that seem like they would fit the bill nicely:
I have a centimeter of clearance at the tightest spot with those 40's. The 45's should fit.
My only issue is when you try and remove the rear wheel. The rear drop outs are almost horizontal so it requires you to slide the wheel forward and gets tight around the rear chain stay bridge. I can just about remove the wheel and tire while inflated. You most likely will have to deflate the tire before removing the wheel. Not a big deal.
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Old 04-12-10, 08:55 AM
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Originally Posted by Ludeykrus View Post
From reading that link, I'm thinking using this fork ($94.49):
https://bikeusa.com/product/rst-neon-...k8089-qc55.htm

With this steerer tube, cut down and rethreaded or just shimmed to hell (I don't know the length I need, yet...) ($16.49):
https://bikeusa.com/product/rst-steer...k7855-qc55.htm

Now, I don't know what's needed to get the brakes sorted out. That original instructional link suggests a cantilever brake hanger, but I don't see that. I do see this threaded steerer brake cable hanger ($5.50):
https://bikeusa.com/product/dimension...r1214-qc55.htm

But I would need more than that to properly hang the brakes, right? Seems like a cheap solution may not be that far out, but I'm just don't know enough about this stuff yet to say for sure.
This intrigues me. Does it still come with V brake bosses? I keep seeing 'No cantilever brake option for any RST forks' in the description. Yet it clearly sows bosses in the picture.

Also, is RST OK or is it really bad? I read lots of 'avoid RST' forks around the forums.

For roughly $100, it fits the bill though.
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Old 04-12-10, 05:58 PM
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Yeah, it says it doesn't have any cantilever brake options for the shocks, but it says it has tabs for running linear pull brakes. Just from looking at pictures of both canti and linear pull setups, it at least looks like both setups would work.

I don't see a big difference in the mounting of canti's vs linear pulls, but I could be wrong. My last post, though, I was just assuming the points wouldn't be the same.

RST forks are definitely lower-shelf shocks compared to others. Then again, I doubt they'll blow out much sooner than another shock; and I've been running a rigid fork hybrid bike on mountain bike trails... anything is a step up.
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Old 04-14-10, 10:20 AM
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Here's a guy selling one of these RST forks cheap. link.

You could buy a 1" steer tube and try it out.

I'm going to stay rigid on mine for the time being.
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Old 04-15-10, 08:46 AM
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I installed my TransSprint 40c tires but haven't had time to try them out except in the backyard.

The tread BARELY clears the front fork. I doubt I could mount even 45c tires w/o some rubbing. Maybe if the wheel was PERFECTLY true.

In the rear, there is more clearance. I could probably squeeze up to a 2.0" tire w/o rub.
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Old 04-26-10, 08:59 AM
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Trailriding on my 40c Michelin TransWorld Sprints. Very capable for light trail riding!
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