Rear triangle bent

Wormishere1

Hi,

I have a Cannondale F800 which has been having problems with the rear end. The rear mech will not shift to the smallest cog even without a cable, the tyre fowls the non drive chainstay and the wheel does not align perfectly straight.

Hacking check the alignment of the frame with some string the non drive triangle is 5mm out (45mm opposed to 40mm) compared to the drive side. This, I'm guessing, is the cause of all my problems.

Am I right and how hard will it be to fix? Can aluminium be re-aligned? Will it also be safe to ride?!

Thanks for your help.

nicklouse

i would take it to a bike shop or someone who can and get it looked at.

what do you mean without a cable?

and your wheel might just have come out of dish.

Wormishere1

Hi,

I mean that even without any tension in the mech it will not align with the smallest cog - and yes iv adjusted the hi/low. I also forgot to say it steers left when riding no handed. It also bends qr skewers at an alarming rate.

The wheel was rebuilt about 4 months ago and just took it back for a trueing. I was toying with the idea of getting it dished to one side so it didn't fowl the frame anymore.

To be honest I might just look for another Dale frame and swap all the parts over for now. Saving for a Canyon Nerve at the mo but will see how much more I can get out of this frame.

The Rookie

Sounds like the frame is toast, but worth getting it looked at as Nick suggests.

Wormishere1

Frame was toast. About 6mm out - LBS had a Park tool to measure it. I got a replacement F800 frame for £100 and all my rubbing/shifing issues are over.

Newly built up frame here >>>> viewtopic.php?f=10017&t=12952209

rockmonkeysc

Only 6mm out? That's straighter than a new Intense.