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Old 10-31-11, 10:35 PM   #1
IntoTheWild
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Buyer's Remorse: Trek 7.5FX

I've been using my 7.5FX to commute to campus and it really is a nice bike. But sometimes the student population is so dense when I'm riding that I have to jump off into the dirt/grass to dodge them. The FX is pretty rough on anything unpaved. I've found myself taking my mountain bike instead on certain days when I know I'll have a lot of people to dodge. I'm thinking I would have done better with an 8.5DS.

So my question...is there any good way to outfit a 7.5FX with a suspension fork, or will it just hose the geometry too much? Perhaps my best bet is just taking a loss, selling the FX, and getting a DS.
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Old 10-31-11, 10:52 PM   #2
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Yeah! They should be dodging you!
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Old 10-31-11, 11:19 PM   #3
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Run some wider tyres if you can... 700:35 Schwalbe CX Compes will still give you great road speed, will improve the ride, and let you handle more than just dirt and grass.

The Bontrager tyres are bulletproof but they are lacking in the ride department.
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Old 10-31-11, 11:30 PM   #4
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How about the carbon fork? Will it take the beating of running off road?
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Old 11-01-11, 10:14 AM   #5
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How about the carbon fork? Will it take the beating of running off road?
I ride a Cannondale Quick4, also a hybrid that has a carbon fork. I put big knobby tires on it and use it a bit like a mountain bike. I have no problems going off road and hitting some pretty major bumps and dips. The bigger tires at relatively low pressure soak up a lot of roughness.
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Old 11-01-11, 10:29 AM   #6
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Hmmm... maybe a change of tires would be sufficient then.

But out of curiosity, how would a suspension fork affect the rideability of the bike? The Suntour NRX is a 63mm travel 700c fork with a 480mm axle to crown. My current carbon fork is about 410mm. So that's quite an increase, although I think that 480mm measurement is completely uncompressed, and of course it would be compressed some with a person on the bike.
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Old 11-01-11, 10:39 AM   #7
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A change from 28mm to 35-37mm will transform the bike into a trail-capable machine. Suspension forks will just add a lot of weight and unbalance the bike.
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Old 11-01-11, 11:06 AM   #8
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Ugh, I despise suspension on bikes that don't really need it.

Anyway, for what you are talking about you may just want to get fatter tires which has already been mentioned. One thing I'd also think about is the wheels. With the 24 spokes this bike might need more than just supspension in order to be be really used off road. In fact it isn't really designed to be an off road bike at all. If that is what you want then you need to get something that is made for that. However what you are describing should be well within what this bike can handle with a little fatter tires and no change to the fork or wheels.
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Old 11-01-11, 11:15 AM   #9
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How about the carbon fork? Will it take the beating of running off road?
.. for a while, then it may break like that other carbon fiber... Wood.

save the road bike for the countryside , take the MTB. for getting to campus..
walking may be better once you are there.
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Old 11-01-11, 11:23 AM   #10
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Go get a slightly larger set of cyclocross tires

and run them at the low end of the recommended PSI range. If you think you need a suspension fork, go watch a cross race.
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Old 11-01-11, 11:26 AM   #11
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I've currently got some kevlar panaracer tires on the bike...they're 32 and 28 for front and rear respectively, and I'm running them at 95 and 105psi respectively. Can I lower those pressures any without risking flats?
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Old 11-01-11, 11:49 AM   #12
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Get a bell and start ringing it constantly. Or work on your crazy eyed stare so people will get out of your way.
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Old 11-01-11, 08:20 PM   #13
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I would increase my cool factor immensely if I acquired a bell.
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Old 11-01-11, 08:22 PM   #14
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I've currently got some kevlar panaracer tires on the bike...they're 32 and 28 for front and rear respectively, and I'm running them at 95 and 105psi respectively. Can I lower those pressures any without risking flats?
Depends how much you weigh.
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