Chainset problem.

jake walsh

Hi I recently fitted an Ultegra octaline chainset to a hybrid I'm building up.However I've encountered a problem,the arm of the chain wheel is rubbing off the frame.Does anyone no how to solve this problem? If so hit me up.Cheers.

Beasty

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jake walsh

Beasty wrote: »

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Would you have a solution that would help me out?

RidleyRider

jake walsh wrote: »

Would you have a solution that would help me out?

Is your frame or crank arms bent in anyway?

jake walsh

RidleyRider wrote: »

Is your frame or crank arms bent in anyway?

No they look straight to me.Would putting spacers behind the BB solve this problem?

RidleyRider

jake walsh wrote: »

No they look straight to me.Would putting spacers behind the BB solve this problem?

I can't see why you'd have this problem if your frame and crank arms are straight

Are you sure you have it all installed properly?

jake walsh

RidleyRider wrote: »

I can't see why you'd have this problem if your frame and crank arms are straight

Are you sure you have it all installed properly?

I think so I doubt it as I'm a novice.I have a friend who's into bike maintenance and He's going to take a look at it for me.Cheers for the response though.

RidleyRider

jake walsh wrote: »

I think so I doubt it as I'm a novice.I have a friend who's into bike maintenance and He's going to take a look at it for me.Cheers for the response though.

Yeah your best off. Sorry I couldn't help any further.

jake walsh

RidleyRider wrote: »

Yeah your best off. Sorry I couldn't help any further.

No problem thanks anyway.There's only so much cyber help you can give Cheers though

colm_gti

You might need a wider BB...if you can get alternate lengths of octalink BB's? Do you know what the width of the current one is?

jake walsh

I'm not sure...I think it could be a 68mm.I'll try the spacers first and if they don't work I'll try a different BB.Cheers.

colm_gti

jake walsh wrote: »

I'm not sure...I think it could be a 68mm.I'll try the spacers first and if they don't work I'll try a different BB.Cheers.

68mm is the thread spacing I'd say, it should be in the region of maybe 110-120mm I think...

jake walsh

I haven't a clue to be honest.Cheers anyway.

DirkVoodoo

68mm would be the bottom bracket shell width.

I think if you want help online, photos are the easiest way to avoid any confusion in language.

jake walsh

Cheers Dirk.

Holyboy

Octalink road doubles use a 109.5mm axle and the triples use a 118mm axle(thats from memory so dont go crazy if im slightly off!) You cant(or shouldnt)use any spacers on them,if one of the cranks is hitting the frame and the chainrings arent then something is bent somewhere. But there is also the small chance that your hybrid frame has a 73mm BB shell, it would be unusual but not impossible, if so the left hand crank may hit the frame,if this is the case theres nothing you can do except get a new BB and chainset!

jake walsh

Holyboy wrote: »

Octalink road doubles use a 109.5mm axle and the triples use a 118mm axle(thats from memory so dont go crazy if im slightly off!) You cant(or shouldnt)use any spacers on them,if one of the cranks is hitting the frame and the chainrings arent then something is bent somewhere. But there is also the small chance that your hybrid frame has a 73mm BB shell, it would be unusual but not impossible, if so the left hand crank may hit the frame,if this is the case theres nothing you can do except get a new BB and chainset!

Okay cheers Holyboy.

michal20

needs spacers on the side of crank which is to close to frame
the bb is 68/73mm wide so if You put two spacers(2,5mm tick each)this gives You 73 mm width

michal20

if You have any problems with it pm your phone number and I can do the job for you on your spot

jake walsh

Hi would you have spacers that would suit my frame? I'll pm you my number now.

Holyboy

michal20 wrote: »

needs spacers on the side of crank which is to close to frame
the bb is 68/73mm wide so if You put two spacers(2,5mm tick each)this gives You 73 mm width

Don't want to sound like a pain but you're wrong, Octalink road BBs only come in 68mm and 70mm(Italian thread) sizes, you should not fit any spacers on any side what so ever as the non drive side cup won't hold the BB unit properly if you do.

OP feel free to let a bodge job be done but you will run into problems very shortly if you do!!!

jake walsh

Okay cheers for that Holyboy.Michal I don't need you help.Cheers anyway.