Zula Posted May 9, 2010 Share Hey Peeps, Ive been through a few chains in my time, but I got a new bike 200k's o so ago, and today after the clean I checked the chain and its at 0.75 Has this ever happened to anyone else, because I cant for the life of me figure out why this is already worn out Any comments will be appreciated Link to comment Share on other sites More sharing options...
Minion Posted May 9, 2010 Share That does sound low. How are you measuring it? Measure it with a steel ruler as described here: https://www.bikehub.co.za/forum_posts.asp?TID=73710 https://www.bikehub.co.za/forum_posts.asp?TID=68830 It may turn out not to be as worn as you think. Otherwise, have you ridden in any particularly rough conditions? That could accelerate the wear. Are you sure the chain was new? Maybe someone's trying to pull a fast one. Link to comment Share on other sites More sharing options...
mountain_lion Posted May 9, 2010 Share I have managed to trash a chain over 800km in the Western Cape mud one winter, but 200km ??? How did you determine it is at 0.75 wear? Measuring with inch ruler is the most accurate way. "Chain checker" tools are notoriously inaccurate... https://www.bikehub.co.za/forum_posts.asp?TID=73710 https://www.bikehub.co.za/forum_posts.asp?TID=68830 Link to comment Share on other sites More sharing options...
mountain_lion Posted May 9, 2010 Share SNAP Edman... Link to comment Share on other sites More sharing options...
Zula Posted May 9, 2010 Share Look I know that the parktool chain checkers dont have a good rep in certain circles. However, I dont have an inch ruler, and have always just used the parktool. On my last bike, I did 700 to 800 k's on a chain before it indicated 0.75 and then I replaced it without batting an eyelid. It has been pretty muddy here in gauteng, but still 200k's is'nt much. I dont think it is a fast one, as the bike was brand new. You could see it was brand new, everything was spotless and scratchless. Im baffled, but R300 now is better than R1k in a few weeks time. Again, never a problem money cant fix! Link to comment Share on other sites More sharing options...
Minion Posted May 9, 2010 Share If it was my R300 on the line, I'd go out and spend the R100 or necessary to get an inch ruler from Mica. Whenever I've taken measurements (be it on research experiments, industrial processes, etc.) and I've gotten an unexpected reading, my first reaction has always been to question the measurement equipment or my use of it. 95% of the time this has turned out to be the actual cause of the bad measurement and the only resultant cost was the replacement of bad instruments or a dented ego. Link to comment Share on other sites More sharing options...
Johan Bornman Posted May 9, 2010 Share Throw away that Parktool thing before it gives you a heart attack. It is RUBBISH. I have one of those and I use it in my bike maintenance classes to show people how inaccurate it really is. I compare its measurement on 5 discarded chains and then the real measurement of a standard rules. The difference is random (on the Parktool side) and always conservative (on the Parktool side). There is no way that a chain can be trashed in 200kms with any type of mud or sand that I know of. Link to comment Share on other sites More sharing options...
stewie911 Posted May 9, 2010 Share Dude, that's like a weeks riding for some guys. Are you doing any maintenance on your chains? I don't even check the wear on my chains. I'll start doing that after 3000km+ Just keep them clean and lubed. Link to comment Share on other sites More sharing options...
jugheaddave Posted May 9, 2010 Share Here in East London (not very muddy) I usually get about 1200k's to a chain. (shimano XT) Link to comment Share on other sites More sharing options...
SURFER Posted May 10, 2010 Share What is the make of the chain? Link to comment Share on other sites More sharing options...
AndreZA Posted May 10, 2010 Share If it was my R300 on the line' date=' I'd go out and spend the R100 or necessary to get an inch ruler from Mica. [/quote'] 12"+ ruler at CNA for less then R20. You just need to scribe the 1/16 and 1/8 markings in. Link to comment Share on other sites More sharing options...
_im_from_earth Posted May 10, 2010 Share Look for one of these: LINK Link to comment Share on other sites More sharing options...
Johan Bornman Posted May 10, 2010 Share Look for one of these: LINK Nope, it is also based on dodgy engineering. Chainwear indicators that measure from roller to roller are inaccurate and inconsistent by definition. The only way to make that instrument reasonably reliable is to make it work over the longest section of chain possible. That way it would dilute the error made at the two roller ends. Chain wear happens in the pins and sideplates and that's where the device has to measure from. A ruler is still the best we have. Link to comment Share on other sites More sharing options...
Minion Posted May 10, 2010 Share 12"+ ruler at CNA for less then R20. You just need to scribe the 1/16 and 1/8 markings in.My cost estimate was a bit high. I see that I got my 24" one from Herbert Evans art store in Rosebank for R40. Link to comment Share on other sites More sharing options...
Christopher Brunsdon Posted May 10, 2010 Share Throw away that Parktool thing before it gives you a heart attack. It is RUBBISH. I have one of those and I use it in my bike maintenance classes to show people how inaccurate it really is. I compare its measurement on 5 discarded chains and then the real measurement of a standard rules. The difference is random (on the Parktool side) and always conservative (on the Parktool side). There is no way that a chain can be trashed in 200kms with any type of mud or sand that I know of. +1000 We all agree with JB For less than half the price of the blue-tool you could get an inch ruler or like me, get a 2nd hand vernier with inch & cm on it. Link to comment Share on other sites More sharing options...
Omlette Posted May 10, 2010 Share Stupid Question, how long is a chain supposed to last?I have about 3500k on my bike and have never checkedit Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now