Unior Chain Wear Checker

Unior Chain Wear Checker

$29.90

After a long search, ZFC have found a simple but effective drop in chain wear checker that can be used to assist in both when to replace chain, as well as when to move dedicated race chain over to become training chain etc.

All new chains will show as 0.2 wear already as opposed to 0.00

0.5 on the unior is equivalent to 0.2mm actual wear, and is the point when a race chain should be moved over to become training chain.

0.75 on the Unior is equivalent to 0.5mm actual wear, and is the point when one should replace training chain.

1.0 on the Unior is equivalent to 0.75, you definitely want to be replacing chains anywhere near that mark asap.

SKU: UNIORCC
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After a long search, ZFC have found a simple but effective drop in chain wear checker that can be used to assist in both when to replace chain, as well as when to move dedicated race chain over to become training chain etc.

You will no doubt have heard me talk about ensure replace chain at right time to avoid wearing into cassette / chain rings. Up to a certain wear tolerance, a chains rollers slot neatly in between cassette / chain ring teeth. Beyond that wear tolerance rollers begin to hit the tips of the teeth and then slide their way down the face. This wears down your cassette and chain ring teeth. Running a chain even for a short time beyond recommended replacement mark can be the difference between little wear to cassette and new chain will mesh beautifully, or notable wear resulting in needing to replace cassette when replace chain, and sometimes chain rings as well. You can probably imagine that wearing through all the metal teeth on cassettes and chain rings also requires some friction. It does. Running a too worn chain and eating into your drive train components is not low friction riding.

Typically I have recommended Park tool cc3.2 as this has a good 0.5 wear mark – often with tools that only have 0.75 and 1.0 – this is too late, a lot of wear to drive train will have occurred by 0.75. However the 0.5 of park tool is recommended replacement mark for a training chain, there was no graduation on when to consider moving dedicated race chain over to becoming training chain. The other park tool chain wear checker that has a dial measure and so has graduations from zero through to 1 has historically been rather difficult to accurately use as the measure one can obtain will vary considerably depending on the amount of force used on the dial. 10 different users will get 1o different wear results – measuring chain wear over a small span of links is measuring tiny fractions of a mm – so a measure that varies considerably depending on level of force used when taking measure is not optimal either. Digital chain wear checkers are expensive. Measuring via digital  / analogue calipers is also far more difficult than one may think. Across a span of 10 or 12 links every 0.1mm is approximately 20% of allowed wear tolerance. It is very difficult to eyeball caliper points to exact centre of two pins across a span of chain to 0.1mm accuracy. Again – 10 different people will record 10 different chain wear measurement results.

I have finally found a simple, accurate drop in checker that can cover both race chain and training chain wear tracking. However – take note the graduations are unfortunately out (in ZFC opiniton).

All new chains will show as 0.2 wear already as opposed to 0.00

0.5 on the unior is equivalent to 0.2mm actual wear, and is the point when a race chain should be moved over to become training chain.

0.75 on the Unior is equivalent to 0.5mm actual wear, and is the point when one should replace training chain.

1.0 on the Unior is equivalent to 0.75, you definitely want to be replacing chains anywhere near that mark asap.

Weight 0.1 kg
Dimensions 15 x 4 x 0.5 cm

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