Park Tools Chain wear guage

Chris5150

Bought one of these and I dont understand how it works!!...says in the instructions you just place it on the chain, but when I do it on my bikes the other end that indicates wear shows replace chain and thats on a new bike!!...do you have to select the big cogs on the front & the rear to maximise the stretch before measuring or something?...rubbish instructions come with it..help!..thanks

orv

You should simply need to hook the er, "hooked" end of the gauge around a link and then see if the other end drops into a link rather than hitting a roller.There are two sides to the tool to show 75% wear and 100% wear.

Chris5150

Well its rubbish then and doesnt work!!...I have a brand new bike covered 50 miles with Campag record groupset...tried the chain guage on there and it falls into the link which indicates replacement needed. Tried it on 3 other bikes and it does exactly the same...maybe I have a faulty one or something! I have correctly hooked the one end as instructed, its not exactly hard to do..hmmm

orv

how bizarre, mine works fine on the three different chains I've tried it on, have you double checked with a manual measurement?
(oh er and thats .75% and 1% wear.)

Bugly

it should drop right onto the chain ie all the way down. :shock:

Monty Dog

Are you guys thinking about the Rohloff chain checker rather than the Park one, which has a sliding pin arrangement to measure the wear? Anyway, they're both pretty self-explanatory to use - if it says the new chain is worn, then check that the pins haven't been bent

magliaceleste

Park also do another kind of checker - like what I've got -which in which you insert the pins and then press a slider thingy to measure the stretch. I guess it's like the Rohloff.

If that's the case then make sure you put the top pin into an inner plate on the chain and not an outer. Otherwise you'll chain will always need replacing!

John C.

Mine works fine, if it rests on top of the link then OK, if it drops betwean the links the change.