replacing a chipped sprocket on a hyperglide casette?

[bobg]

The chain's been slipping on the 15 tooth sprocket of my fairly new hyperglide cassette and I've just discovered a 45 degree biggish chip out of one of the teeth. I'm guessing thats the cause cos the chains new and all the other gears run silky smooth. Rather than fork out £25 for new 21-11 can I buy a replacement 15? No luck so far via google. Failing that I wondered if I could get away with a unramped one designed for a single speed convesion or would i make indexing significantly "graunchy" Apologies for bein a cheapskate, its in the blood!

 

[domtyler]

If it's new then take it back and tell them it was defective.

 

[fossyant]

If you can find a UG sprocket on it's own then you might get away with it - take it back or buy another cassette - no option these days !

 

[Smokin Joe]

The words "Fairly new" makes it a no-brainer. Take it back.

 

[Steve Austin]

If the shop won't change it will work fine without that tooth

 

[bobg]

If the shop won't change it will work fine without that tooth

Steve, That suggests that it might not be the chip thats causing the chain to slip? Or do you mean file it down so the chain doent bear on the chipped bit
BTW , when I said "quite new" I may have exaggerated just a tad ie not new enough to take it back... I believe I was a litle heavy handed with the chain whip, ie I needed a 3 ft bit of scaffold pole to get it off ... which slipped a little just a few times

 

[bobg]

Aw, to hell with expense , I'll throw caution to the wind and buy a new one I will of course be inconsolable if it still slips.... ( or is that unconsolable)

 

[Chris James]

Without going to look at my own cassette, I understood that Hyperglide cassettes have missing bits of teeth to help shifting.

Do the other teeth look like shark fins? If they look okay then I doubt this tooth is your problem.

 

[Steve Austin]

yep. remove that one tooth with some pliers/a saw. it will work well enough to get the use out of it. it will still be engaged with more teeth than when on the 11 tooth cog.

 

[Amanda P]

If you decide you want to replace the one sprocket, here's one.

 

[andrew_s]

yep. remove that one tooth with some pliers/a saw. it will work well enough to get the use out of it. it will still be engaged with more teeth than when on the 11 tooth cog.

Agreed.

It's sticking out bits where the tooth is twisted or something that cause problems. One missing tooth is nothing.

Here's my worst ever sprocket, with 10 teeth gone.

 

[bobg]

Chris, None of the teeth look like this one But if I'm honest if it hadnt have been that the LBS suggested it I'd have thought it wouldnt have made any difference to its operation -It only slips under pressure and the chain doesnt move from the 15 sprocket or ride up, it just well... slips! Neither they or I can think of another option! I'll file it off Steve, just to see if it does the trick I think, then get a single sprocket from SJS as per Uncle's link and Lee's pm. Mind you a full 105 cassette from Chain Reactions is 16.99 ( 50% off ) and it cost me more than that today to take my son to the pub for a pint and a pie

Thanks to all

 

[bobg]

Agreed.

It's sticking out bits where the tooth is twisted or something that cause problems. One missing tooth is nothing.

Here's my worst ever sprocket, with 10 teeth gone.

Bloody Hell Andrew... moths??

 

[bobg]

Just for the sake of general interest... I ground off the offending tooth but the chain's still slipping. Just ordered a new complete cassette... if it still slips I'll be back for further enlightenment

 

[fossyant]

How new is the wheel/free hub ????