Should Chainring wear that quick....

[jonbrackenridge]

Hi all,

Got my new bike on 1st August, Boardman Ltd Ed Team Carbon, however I pulled it apart again for a clean today and noticed the Large chainring looks really worn already, there's no issue when riding no skipping of the chain etc, its done 270 miles in a month.

My giant defy I had previously did nearly 1000 miles before I had to change the rings.

 

[oldroadman]

Looks like you have a chain problem. I can't believe you only got 1,000 miles from a ring, something is going wrong. Clean and lube chain regularly, use sensible gears, check chain for stretch?
Anyway that wear after 270 miles is a warranty issue if you bought it new.

 

[jonbrackenridge]

Thanks for the reply, it's due a tweak in next week or so for cable stretch etc but I am taking it to my lbs NOT halfords but guess for warranty query/claim I'd have too.

 

[phil_hg_uk]

Well I put my 105 triple chainset on in early 2011 and it is still on the bike and working fine, at a guess some 6000 miles or more later so I think there is a problem if yours is only lasting 1000 miles

 

[400bhp]

My giant defy I had previously did nearly 1000 miles before I had to change the rings.

Huh

 

[MikeW-71]

Huh

+1 My Defy is knocking on 2000 miles and there's nothing wrong with the rings at all.

 

[fossala]

I have never worn out chainrings and I ride over 100 miles a week.

 

[TonyEnjoyD]

Which lube to you use, how often and clean how frequently?

 

[Rob3rt]

Erm..... what is wrong with that chainring?

You do realise that the teeth on chainrings are not all the same size and shape right? They vary around the ring in order to improve shifting performance!

I think someone doesn't realise what a chainring is meant to look like!

 

[Pedrosanchezo]

@jonbrackenridge

The paint has worn off slightly from wear but that is purely cosmetic. There is some friction between the chain and crank/cassette teeth. Perfectly normal.

As Rob says above, the teeth are shaped this way to improve shifting. Again perfectly normal and IMO your kit seems in fine condition.
If it all works as fine as you say, then put your mind at rest.

 

[Mo1959]

Erm..... what is wrong with that chainring?

You do realise that the teeth on chainrings are not all the same size and shape right? They vary around the ring in order to improve shifting performance!

I think someone doesn't realise what a chainring is meant to look like!

I honestly didn't know that, so thanks for the info

 

[Davidc]

My chainrings look a bit like that, and have from new.

Had to replace a middle one at 3,000 after I bent it when cleaning a load of gunge out, apart from that I usually reckon on 9 to 12 thousand miles from a middle one. The others last forever. Bike's done just over 4000 and I have a spare middle one for fitting in roughly 9000 miles time!

 

[Boris Bajic]

I've replaced several chainrings over the years, but I like to think I get 6-7,000 miles out of one as a minimum - usually significantly more.

Luckily (and I don't know whether any of you have this on your bikes) there is a spare one mounted right next to it, so when it wears out you can just move a lever and the chain is lifted onto the spare. It even works halfway through a ride!

So that doubles my chainring mileage straight away!

But it's much harder to pedal on the spare. That may be because it's so big.

 

[Biker Joe]

Looks fine to me.
On a worn chain ring the teeth take on a hooked appearance.

 

[YahudaMoon]

Bit off topic but

An old trick for getting twice the distance from a chain ring is putting a worn chain ring on back to front