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Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

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Old 12-13-06, 02:52 PM   #1
Turboem1
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Folded a sprocket in half today

So I took my 2002 Specialized Rockhopper out for a spin today after installing my new Geax Blade tires. I wanted to see how good the traction on these will be as I got them for snow use. Its not snowing yet so I take them on my lawn. Im in the small cog up front and the third from biggest in the rear. So lets see if these baby's will grip or spin. I stand up and mash the pedals. The front wheel lifts off and they hook amazing. It just rained a little bit so the ground is not muddy but very dense and thick. This is fun, let me do it again. I go to pedal real hard again and the pedals jump real fast. I look down. Oh the chain fell off....wait....the front sprocket is bent in half. Guess they hook a little to good and/or I can generate way to much torque (I weigh 265).

Heres some pics...

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Old 12-13-06, 03:25 PM   #2
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Yep, that Clydesdale Power! Now you know why you can do such a strong short sprint, it's all about torque then!
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Old 12-13-06, 05:16 PM   #3
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Quote:
Originally Posted by Tom Stormcrowe
Yep, that Clydesdale Power! Now you know why you can do such a strong short sprint, it's all about torque then!
Looks to me more like someone forgot a bolt or didn't tighten one enough.

Just a little nitpicking...um! nitpicking... on the crank they are called chainrings. Sprockets on on the wheel. Don't know why but that's the convention.
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Old 12-13-06, 05:16 PM   #4
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Looks like a litle rust may have weakened the situation as well. Wow. It is a wonder I still have teeth on my sprockets.

By the way, what is the lifespan of a sprocket and chain? My teeth are looking pretty worn and I am experiencing some chain slippage.
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Old 12-13-06, 06:08 PM   #5
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I think typically between 2K - 4K depending on how you ride, take care of the chain/gears, etc...
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Old 12-13-06, 06:09 PM   #6
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And damn man - good job. I came close to doing that on my large chainring - started bending but were too worn to bend it all the way.

Just got new Sugino cranks though - yay!
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Old 12-14-06, 06:59 AM   #7
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Ok we can say it was a loose bolt, or a little rust, but you have to admit that is WAY COOL! If that was me I would be bragging about that one for years to come.

Very cool, and if I were you I would show those pictures to everyone I know.

That is some serious foot pounds baby! Ha Ha Ha
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Old 12-14-06, 07:30 PM   #8
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You didn't need that small charinring anyways. It just slows you down. Remove it, adjust the FD so you can't overshift and keep on trucking.
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Old 12-15-06, 02:05 AM   #9
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Ehh - when I went up to Nyack there were some hills I was standing on the small chainring. Then I gave up and started walking
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Old 12-15-06, 12:24 PM   #10
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Quote:
Originally Posted by cyccommute
Looks to me more like someone forgot a bolt or didn't tighten one enough.

Just a little nitpicking...um! nitpicking... on the crank they are called chainrings. Sprockets on on the wheel. Don't know why but that's the convention.
-------------------------------------
I think that that was a "Laugh In" Goldie Hawn routine: "It might be Chainring to you but it's SPROCKET TO ME!!
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Old 12-15-06, 03:01 PM   #11
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you need to mount that ring on a nice plaque and hang it on the wall!
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Old 12-15-06, 03:18 PM   #12
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I did that with my cheap alivio alu chain ring. I shifted but the shifter wasn´t well adjusted and then I powered too soon going up a hill and just bent the chain ring in half. Then to get home I had to hammer the chain ring flat with a rock- a real caveman repair. After that I put a steel chain ring on.
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Old 12-16-06, 11:15 PM   #13
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Way to go I have done one similar as well tore the chainring loose and shot the bolt through a bank window. Needless to say paying for a window was not cool, but that's HEAVY METAL DESTRUCTION!!!!
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Old 12-17-06, 07:34 AM   #14
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Quote:
Originally Posted by Air
Ehh - when I went up to Nyack there were some hills I was standing on the small chainring. Then I gave up and started walking
Wouldn't standing on the pedals be more effective as far as hill climbing goes?
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Old 12-17-06, 09:02 AM   #15
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I KNEW I was doing something wrong!

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Old 12-17-06, 08:09 PM   #16
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Damn it chain ring bolts, one more thing I have to check.
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