Worn Chainring

You are absolutely right, shows what I know! I had not previously seen 50 t rings on the 130 bcd. Now I think of it, it will be the inner ring that that was the limiting factor. Thanks for the education.....

geekinthesticks wrote:

I bought the same bike in November for use as a winter bike. My rear cassette was completely worn out after 1500 miles. However, front chain rings were OK. I replaced my cassette and chain. I can believe you wore out the rear cassette, but the front chain rings are made of better stuff.

Have a look at your rear cassette. If the teeth look like sharks teeth it's fscked. Each tooth should have a flat top.

Disagree that chainrings are harder wearing. If anything they are generally made of materials more susceptible to wear. They wear more slowly due to the higher tooth count.

Bobbinogs wrote:

I with the doubters on this one. I have yet to wear out a chainring and do a fair few miles each year.

And FSA chainset will fix that for you. 2500 miles to the ring... If you're lucky.

Ailibo - take a close up of your chainset (chain off) so we can see what you mean.

Jack Osbourne snr wrote:

Bobbinogs wrote:

I with the doubters on this one. I have yet to wear out a chainring and do a fair few miles each year.

And FSA chainset will fix that for you. 2500 miles to the ring... If you're lucky.

Ailibo - take a close up of your chainset (chain off) so we can see what you mean.

What do you do to get that sort of wear! I fitted a Campag Chorus Chainset in 2007, I think, average of 7k a year since I replaced the rings beginning last year as they were worn out. c35000miles.... could be more though! The Stronglight replacement is on 10k and still fine.

mrmo wrote:

What do you do to get that sort of wear! I fitted a Campag Chorus Chainset in 2007, I think, average of 7k a year since I replaced the rings beginning last year as they were worn out. c35000miles.... could be more though! The Stronglight replacement is on 10k and still fine.

Year round commuting through Glasgow is what I do. I'm on my second cycle to work bike, both of which have had FSA gossamer chainsets... And both of which have needed new big rings after not a lot of miles.

I've replaced one with a Stronglight and got 10x the mileage and it hardly looks worn... The next swap out will take place soon on bike number 2.

I have a Campag Record triple on my Audax bike that looks almost brand new after many thousands of miles. I also have a Centaur chainset on my 1988 Bianchi that is still pristine.

The issue is not what I'm doing. The issue is how shit FSA chainrings are.

if this is the right bike its 130 bcd..

http://www.decathlon.co.uk/triban-500-se-road-bike-black-id_8306187.html

I use an 8 Speed set up ( claris Mech, Sram 8 Speed chain, Sram 8 speed Cassette 11- 30 and the stronglight 54 teeth chain ring, Shimano Triple Leavers from before claris even came out). Works fine.

I wouldnt compare it to an 10 / 11 set up / bike.. why would you? its an entry level set up. All year round rig. It shifts fine, You dont have to worry about rubbing on a mech or set up.

I use an 8 Speed set up. Shimano Triple Leavers, Claris Mech, Stronglight 54 tooth Chainring, sram 11-30 cassette and sram 8 speed chain. Changed the cranks to these below. Im short at 5 ft 4 so you might need longer cranks.

http://www.ebay.co.uk/itm/Single-Speed-Crankset-Chainset-All-Alloy-1-8-0...

You will want to go to a bike shop and get them to check the chain line and use the right length square taper bottom bracket to correct this. Otherwise you wont be able to use all the gears.

Im not even sure what mine is but it is shorter than stock.

All in all, total cost was about sub 70 quid. As you will have most of the parts anyway. (eg chain, mech, casette and leavers)

I love it, plus it has a cool retro look. Older days of BIG plates on the front. ALWAYS in the BIG ring.

ailibo wrote:

And to everyone else, I made a big rookie mistake by being lazy in the winter and used a fairly rusty chain which ruined the ring, I recently swapped to a new chain but it slips on that single gear, any other gear works fine since I never used them much.

Everyone seems to be ignoring this. Running a dirty, unlubricated chain will wear it very quickly and the fact that the OP said that fitting a new chain makes it skip on this ring means that OP is probably right, the chainring is excessively worn.

One word of warning - the cassette may also be worn and need replacing.

Next time, regularly clean and re-lube your chain. It will save you money in the long run. It's like failing to change the oil in a car engine, but perhaps even worse.