Fractured front cog? - Cycling Mob: Road Cycling, Mountain Biking and More

07-05-2004, 08:05 AM

Dear Bikers,

I fear my bike has a fracture in its front cog. I first noticed something
was wrong when I heard the front cog hitting against the front derailleur
once every revolution of the pedals. It turned out the front cog was
actually bent and so "wobbled" as it rotated, relative to the front
derailleur. Closer inspection showed that the front cog was a little loose
and could be jiggled a little. The join between the front cog and the right
pedal was clearly loose.

I took the right pedal off and found a little crack in the front cog. Some
photos are here:

[Only registered and activated users can see links. ]

Is this a fracture? If so, how dangerous is it? Can I ride my bike with
this fracture? Do I need a new front cog & right pedal?

Thanks,
Jack

--
rec.bicycles.off-road is moderated by volunteers. To find help solving
posting problems, or contact the moderators, please see [Only registered and activated users can see links. ]
Please read the charter before posting: [Only registered and activated users can see links. ]

07-05-2004, 08:17 AM

On Mon, 5 Jul 2004 11:03:27 CST, "Daniel Kelly \(AKA Jack\)"
<[Only registered and activated users can see links. ].ac.uk> wrote:

>Dear Bikers,
>
>I fear my bike has a fracture in its front cog. I first noticed something
>was wrong when I heard the front cog hitting against the front derailleur
>once every revolution of the pedals. It turned out the front cog was
>actually bent and so "wobbled" as it rotated, relative to the front
>derailleur. Closer inspection showed that the front cog was a little loose
>and could be jiggled a little. The join between the front cog and the right
>pedal was clearly loose.
>
>I took the right pedal off and found a little crack in the front cog. Some
>photos are here:
>
>[Only registered and activated users can see links. ]
>
>Is this a fracture? If so, how dangerous is it? Can I ride my bike with
>this fracture? Do I need a new front cog & right pedal?
>
>Thanks,
>Jack

That link doesn't work for me. At anyrate, be sure and carry extra duct
tape in case the cob breaks 30 miles frome home, eh? ;-D

-B

07-05-2004, 08:17 AM

On Mon, 5 Jul 2004 11:03:27 CST, "Daniel Kelly \(AKA Jack\)"
<[Only registered and activated users can see links. ].ac.uk> wrote:

>Dear Bikers,
>
>I fear my bike has a fracture in its front cog. I first noticed something
>was wrong when I heard the front cog hitting against the front derailleur
>once every revolution of the pedals. It turned out the front cog was
>actually bent and so "wobbled" as it rotated, relative to the front
>derailleur. Closer inspection showed that the front cog was a little loose
>and could be jiggled a little. The join between the front cog and the right
>pedal was clearly loose.
>
>I took the right pedal off and found a little crack in the front cog. Some
>photos are here:
>
>[Only registered and activated users can see links. ]
>
>Is this a fracture? If so, how dangerous is it? Can I ride my bike with
>this fracture? Do I need a new front cog & right pedal?
>
>Thanks,
>Jack

That link doesn't work for me. At anyrate, be sure and carry extra duct
tape in case the cob breaks 30 miles frome home, eh? ;-D

-B

07-05-2004, 08:17 AM

On Mon, 5 Jul 2004 11:03:27 CST, "Daniel Kelly \(AKA Jack\)"
<[Only registered and activated users can see links. ].ac.uk> wrote:

>Dear Bikers,
>
>I fear my bike has a fracture in its front cog. I first noticed something
>was wrong when I heard the front cog hitting against the front derailleur
>once every revolution of the pedals. It turned out the front cog was
>actually bent and so "wobbled" as it rotated, relative to the front
>derailleur. Closer inspection showed that the front cog was a little loose
>and could be jiggled a little. The join between the front cog and the right
>pedal was clearly loose.
>
>I took the right pedal off and found a little crack in the front cog. Some
>photos are here:
>
>[Only registered and activated users can see links. ]
>
>Is this a fracture? If so, how dangerous is it? Can I ride my bike with
>this fracture? Do I need a new front cog & right pedal?
>
>Thanks,
>Jack

That link doesn't work for me. At anyrate, be sure and carry extra duct
tape in case the cob breaks 30 miles frome home, eh? ;-D

-B

07-05-2004, 08:17 AM

On Mon, 5 Jul 2004 11:03:27 CST, "Daniel Kelly \(AKA Jack\)"
<[Only registered and activated users can see links. ].ac.uk> wrote:

>Dear Bikers,
>
>I fear my bike has a fracture in its front cog. I first noticed something
>was wrong when I heard the front cog hitting against the front derailleur
>once every revolution of the pedals. It turned out the front cog was
>actually bent and so "wobbled" as it rotated, relative to the front
>derailleur. Closer inspection showed that the front cog was a little loose
>and could be jiggled a little. The join between the front cog and the right
>pedal was clearly loose.
>
>I took the right pedal off and found a little crack in the front cog. Some
>photos are here:
>
>[Only registered and activated users can see links. ]
>
>Is this a fracture? If so, how dangerous is it? Can I ride my bike with
>this fracture? Do I need a new front cog & right pedal?
>
>Thanks,
>Jack

That link doesn't work for me. At anyrate, be sure and carry extra duct
tape in case the cob breaks 30 miles frome home, eh? ;-D

-B

07-05-2004, 08:17 AM

On Mon, 5 Jul 2004 11:03:27 CST, "Daniel Kelly \(AKA Jack\)"
<[Only registered and activated users can see links. ].ac.uk> wrote:

>Dear Bikers,
>
>I fear my bike has a fracture in its front cog. I first noticed something
>was wrong when I heard the front cog hitting against the front derailleur
>once every revolution of the pedals. It turned out the front cog was
>actually bent and so "wobbled" as it rotated, relative to the front
>derailleur. Closer inspection showed that the front cog was a little loose
>and could be jiggled a little. The join between the front cog and the right
>pedal was clearly loose.
>
>I took the right pedal off and found a little crack in the front cog. Some
>photos are here:
>
>[Only registered and activated users can see links. ]
>
>Is this a fracture? If so, how dangerous is it? Can I ride my bike with
>this fracture? Do I need a new front cog & right pedal?
>
>Thanks,
>Jack

That link doesn't work for me. At anyrate, be sure and carry extra duct
tape in case the cob breaks 30 miles frome home, eh? ;-D

-B

07-05-2004, 08:41 AM

Badger_South wrote: {OP snipped}

> That link doesn't work for me. At anyrate, be sure and carry extra
> duct tape in case the cob breaks 30 miles frome home, eh? ;-D
****

That's just corny advice!

Bill "sure you meant 'cogg' ;-) " S.

07-05-2004, 08:41 AM

Badger_South wrote: {OP snipped}

> That link doesn't work for me. At anyrate, be sure and carry extra
> duct tape in case the cob breaks 30 miles frome home, eh? ;-D
****

That's just corny advice!

Bill "sure you meant 'cogg' ;-) " S.

07-05-2004, 08:41 AM

Badger_South wrote: {OP snipped}

> That link doesn't work for me. At anyrate, be sure and carry extra
> duct tape in case the cob breaks 30 miles frome home, eh? ;-D
****

That's just corny advice!

Bill "sure you meant 'cogg' ;-) " S.

07-05-2004, 08:41 AM

Badger_South wrote: {OP snipped}

> That link doesn't work for me. At anyrate, be sure and carry extra
> duct tape in case the cob breaks 30 miles frome home, eh? ;-D
****

That's just corny advice!

Bill "sure you meant 'cogg' ;-) " S.