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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 01-24-08, 12:01 AM   #1
mark9950
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What happened to my trek bike

I bought it 5 months ago and just after about 1000 miles it just started breaking spokes out of the blue.I fixed it though by re spoking the whole wheel and now no problems.

It was the trek classic cruiser.

Also with this bike I have noticed that this bike eats chains like crazy,I mean one month and a half ago I just put a new chain on and only rode about 400 miles and now my chain is elongated about 1/32 of an inch.I know that chains wear but this rapidly?I have those 2.125 tires and my weight is 250lbs.
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Old 01-24-08, 12:07 AM   #2
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considering how well written the question was and the information posted is, i would suggest asking the guy over the the mechanics section. they would be best suited to answer you question in a quick and efficient manner

honestly it sounds like you driver train is out of alignment.
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Old 01-26-08, 01:47 AM   #3
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How its a fixed gear coasterbrake with the straight chainline.
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Old 01-26-08, 01:57 AM   #4
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The wheels may have not been built well enough for a guy your size and the chain issue probably stems from a drivetrain alignment issue.

For reference, I can get almost 5000 km out of my monospeed chains.
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Old 01-26-08, 10:02 AM   #5
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Hub is blown out.
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Old 01-26-08, 10:20 AM   #6
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Originally Posted by mark9950 View Post
How its a fixed gear coasterbrake with the straight chainline.
its a single speed, not a fixed gear. if you look at wikipedia's article about fixed gears, you will learn about them.

A fixed gear with a coaster brake would be a very bad idea.
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Old 01-26-08, 10:28 AM   #7
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Hub is blown out.
And how the F would it

a) turn
b) affect chain wear

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Originally Posted by mark9950 View Post
and my weight is 250lbs.
Yep, that's a factor. Is your chain too tight? There should ideally be on average 1/4" play up and down. If your chain is set too tight, everything will wear ultra fast. I'm also assuming your chainline is not substantially out either.
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Old 01-26-08, 11:17 AM   #8
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your weight + a bad wheel build from the factory = broken spokes.
after the rebuild you should be fine

1/32" chain wear is negligible.
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Old 01-26-08, 06:12 PM   #9
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The chain elongation is negligible, though keeping it lubed always helps it last. The broken spokes are from a crap wheel build, get a new wheel from a reputable source and keep an eye on the tension (pluck the spokes and listen to the pitch every once in a while, if they're all over the place the wheel needs attention).
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Old 01-26-08, 06:36 PM   #10
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A fixed gear with a coaster brake would be a very bad idea.
It's not really a bad idea, it's just very impossible. Like the four sided triangle i built the other day.
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Old 01-27-08, 07:59 AM   #11
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Its fine now I rebuilt the whole wheel from scratch,I took off all the spokes,relaced with brand new spokes,stress relieved the wheel,and its fine.

I found out that despite I never built a wheel before I was very successful at it.its fine now,and pretty straight too,got a tiny hump,but better than buying a new wheel.

The bicycle dealer told me the bike was made her in the USA and that it would support my weight(it did for 1000 miles and still does after my rebuild),I think he lied,I do not think I will buy another bike from that dealer again.I know that bike was made in china.

Despite I never rebuilt a wheel before it was pretty simple.as long as the rim was fairly straight,I laced each spoke and threaded it in the nipple until all the threads were not showing,then after that was done I put it on the bike(no truing stand) and turned each nipple with a screwdriver starting at the valve one full turn at a time checked for tightness and waalaa done(it only took two full turns(no dishing this is a single speed).I couldnt believe that I actually done it and its holding.
As for my weight as a factor,it might have played a factor,but it started after I had put 1000 or more miles on it?if it was my weight why didnt it start sooner,like after maybe 30 miles?

Last edited by mark9950; 01-27-08 at 08:26 AM.
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