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Old 12-08-07, 12:59 PM   #1
legalize
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How do you tell if a frame is bent on a rockhopper fsr?

So I went back to the LBS, because after my drivetrain was replaced I've been having all sorts of skippage. It basically boils down to.....at this point... (I haven't truly re-tested the ride after bringing it back, mind you, although a quick ride tells me maybe it has improved).......

That if I have any more problems, it must be due to either 1) the frame being bent or 2) the derailler (if you were to grab the bottommost part of it that the chain last leaves) being able to move laterally too much, causing skippage when torque is applied, or causing gears to change back and forth while riding with minimal torque

He tried seeing if the frame was bent, using some kind of tool that looked like a metal bar with an adjustable 'single claw' on one end...But he said since my bike doesn't have a continuous pole going from the seatpost, it is hard to tell whether or not the frame is bent.

I was wondering what kinda input you'd have on that comment he made.

Here's a picture, although you probably don't need it, but see how the seatpost doesn't go down, unlike a bike without rear suspension?
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Old 12-08-07, 03:59 PM   #2
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unless you've had a HUGE crash, I don't see how you'd have bent your frame... but, sounds like a deraillure adjustment to me.
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Old 12-08-07, 04:21 PM   #3
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First thing check the cables, the wires in the housing are likely pulled out of the housing some.
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Old 12-08-07, 07:43 PM   #4
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make sure the derailer hanger isn't bent or loose. I'd try another cassette.
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Old 12-08-07, 08:17 PM   #5
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i dunno it seems like the only thing could be the derailler, assuming the frame isn't bent which it shouldn't be.

my problem is that i dont know what a new derailler should feel like. but the guy at the bike shop moved it around and said it was pretty loose, and if i have any problems the next step would be to replace the derailelr
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Old 12-08-07, 08:40 PM   #6
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Quote:
Originally Posted by legalize View Post
my problem is that i dont know what a new derailler should feel like.
Next time you're at the LBS go to a new bike and wiggle the RD.

Why don't you have the shop assess the condition of your bike, particularly the drivetrain, and then have them explain to you in detail what they've found, you're bound to learn SOMETHING.
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