chain wear

fadsarmy

Hello,

I'm quite new to biking. I have owned a Giant Defy from new for 15 months during which I have only done 200 turbo trainer miles. I took my bike to the local bike shop to get the gears tuned and he said my chain has 0.75 wear and should be replaced. I lubed the chain regularly so I don't know why the chain has worn out so quickly. What could be the reason for this?

cougie

Check it yourself and if it hasnt stretched never use that shop again.

It sounds ridiculously unlikely - even if youd done your 200M outside.

Why havent you ridden outside? Seems a waste of a good bike?

fadsarmy

cougie wrote:

Check it yourself and if it hasnt stretched never use that shop again.

It sounds ridiculously unlikely - even if youd done your 200M outside.

Why havent you ridden outside? Seems a waste of a good bike?

Thanks for the prompt reply. I've just ordered a chain wear tool. He did show me at the bike shop that it was 0.75 worn but I didn't get the chain replaced. I have another bike for outside so saves me changing wheels everytime.

SME

Chain wear indicators are fine, but most will slightly push the rollers apart which can give 'premature' readings. Hard to explain what I mean...
If you had an open pair of scissors and measured the gap between the handles, you could measure from the middle of the finger holes - if you open up the scissors more your fingers push on the outside part of the finger holes, so the distance between your fingers is greater (hope this makes sense).

There is a chain measuring tool that springs between 2 adjacent links so that it's centered between the links rather than pushing one roller over, and so gives more accurate readings. This picture might help...

http://www.bike.bikegremlin.com/wp-cont ... -flaws.jpg

or this... (about 3/4 of the way down)

http://www.bike.bikegremlin.com/2015/12 ... n-bicycle/

Personally, I just measure 12 full links - should be exactly 12 inches, when it reaches 12 1/10 inches, time to change.

sungod

as above, use a ruler, it's really very easy, and more consistent than a gauge

scroll down until you get to the "measuring chain wear" heading...

http://www.sheldonbrown.com/chain-wear.html