Rohloff Chain Wear Indicator

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Price: $27.60 Too low to display   

Product Feature

• Works with all 1/2" pitch chains
• Allows the measurement of chain wear in seconds and indicates if the chain is too worn for steel or aluminum sprockets/chainrings

Product Description

The Rohloff Caliber 2 is a precision made chain wear indicator.

• Works with all 1/2" pitch chains
• Works with all 1/2" pitch chains
• Allows the measurement of chain wear in seconds and indicates if the chain is too worn for steel or aluminum sprockets/chainrings

Rohloff Chain Wear Indicator Review

There's a problem with this tool -- as well as its copycats by Park, Sette and others -- that consistently creates premature "worn out" indications on chains that are still good for use.

The problem is a near and dear pet peeve of mine, and has been for a long time. It is difficult to describe using just words, as I've learned from previous discussions online, but I'll try: This style of wear indicator pushes two of the chain's rollers in opposite directions, so not only is it measuring chain elongation due to wear, it is also measuring the slop between a roller and the pin (where slop is always present, even on a new chain, but the amount of slop is inconsistent between brands & even models of chains).

For a good graphical representation of the problems of this design of chain wear indicator, use your favorite search engine to look for "pardo chain wear measuring tools" (pardo,net being the host website, not a seller or maker of chain gauges).

With this tool, I consistently received "no go" indications when the chain was just over half-way to the real wear limit.

So far, the only wear tool I'm familiar with (but haven't owned) that measures correctly is the Shimano TL-CN41 Chain wear indicator. It uses three prongs, two of which push two chain rollers in the same direction (just as a cassette or chainring would) and checks the distance between them. With this approach, the tool is measuring only chain elongation, and roller slop is not a factor.

(There's the presumption that roller slop is the same for each roller in the chain, but that assumption is just as relevant when the chain is brand new as when it is worn.)

My own method is the "12 and 1/16th rule" and requires only an accurate steel ruler. The distance between two chain pins is exactly 1/2 inch on a new chain, or 12 inches when measuring across 24 links. Once 24 links measure out to 12-1/16", the chain should be replaced without risking damage to the cassette cogs and chainrings.

The good news about the Rohloff Caliber, and others like it, is they'll never give a false "OK" condition. So from that standpoint, if you use this tool, your drivetrain will remain in great shape. But you'll be spending nearly 2x as much on replacement chains.

It's regrettable I feel compelled to give this a one-star rating -- after all, I'm a huge fan of Rohloff and there's no doubt that the Caliber is a precisely engineered and manufactured instrument. But if it's measuring the wrong thing, all the rest is for naught.

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