Chain wear checker

jimo746 · Nov 25, 2012

Right, did a search on this subject, but without joy.

Been asked about Christmas pressies and decided I'm going to ask for a chain wear checker tool, as I always leave the chain on too long and end up replacing the cassette at the same time.

My question is... are they all much of a muchness? obviously the common wear indicators will be .5 and .75, but I need a checker that will work on 3/32 and 1/8 chains 7,8,9 speed etc.

Anyone recommend one?

02gf74 · Nov 25, 2012

jimo746":jdzkjk9u said:
Anyone recommend one?

yes.
this one

one of the cheaper ones but does as good a job as ones costing 5x the price. works on 9 and 10 speed bike chains and I so no reason why it won't work on 8 or lesser speed chains providing the pitch and the roller diameter is the same.

.75 means replace chain very very soon
1.0 means replace chain now or it may be too late

jimo746 · Nov 25, 2012

looks like a good stocking filler

but not due in stock until 24th December :x damn you CRC! I'll look elsewhere.

malt · Nov 25, 2012

Or you could just set the chain on the largest ring at the front, pull the chain forward off the leading edge of the ring, then if you can fit a 5/6mm allen key under the chain, it needs replacing.

I always use to go 2 chains for each cassette.

cyfa2809 · Nov 25, 2012

02gf74":2ngfdfbx said:
.75 means replace chain very very soon
1.0 means replace chain now or it may be too late

I disagree. .75 is change chain now. 1% elongation is usually change drivetrain though you can sometimes get away with keeping some parts if your lucky.

There are others that are the same, i think mine is a bikehut one.
We used to use a park one which are superb but used day in day out can take some wear though they do last a long while.

02gf74 · Nov 29, 2012

I don't mind if you disagree, not the slightest.

.... but if you think about it, why would you need the 1.0 indicator as the .75 will be enough?

Whoever wrote this on Bikeradar is saying the same as me.

for those too lazy to follow the link:
You just hook it on to the chain, which takes about two seconds - if one end stands proud, everything's fine, if it falls into the chain, it's worn. This is two sided: one side checks 0.75% wear ('replace chain soon'), the other checks 1% wear ('replace chain immediately'). It fits all chains from 1/8in singlespeeds to 10-speeds.

cyfa2809 · Nov 30, 2012

Have you tried putting a new chain on a drivetrain that has been running a 1% stretched chain for a while, doesnt normally work. Variable of course but rule of thumb. That is how we have always done it. I see your point though, somewhere in between would be a good point i suppose.

02gf74 · Nov 30, 2012

^^^ .... actually a little bit more googling seems to show we both are correct - there is checker (Park Tools I think) that has .5 and .75 wear indicators.

I replace chains as soon as they go past .75 so cannot recall if I have fitted a new chain on a cassette that was running with > 1 % worn chain.

It does not surprise me that a new chain would skip on the cassette in that case.

but the conclusion is that a chain wear is very useful since it can save a bit of money by being able to run the same cassette for 2 or 3 chains (I have not got past 3 I don't think) £ 10 for chain, £ 30 for cassette.

twain · Nov 30, 2012

could go for this one:

http://www.ebay.co.uk/itm/CHAIN-WEA..._Cycling_Tools_RepairKits&hash=item4d03cc0368

looks very similar to the xtools one linked on CRC.....plenty left too

and its reduced to 3.94 (inc postage)

dbmtb · Nov 30, 2012

None of the ones mentioned so far.

Best one of that type is the Rohloff.

But really- you want the same one I have in my workshop.....

(Except I don't know who makes the damn things)

Will get back to you tomorrow.

Chain wear checker

jimo746

02gf74

Old School Grand Master

jimo746

malt

Retro Guru

cyfa2809

02gf74

Old School Grand Master

cyfa2809

02gf74

Old School Grand Master

twain

dbmtb

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