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Reviews (4)

Jan 18, 2018
Fits round or flat spokes
I can't tell the difference between this spoke magnet and the branded ones that cost much more. It fits securely to round or flat spokes, like those on Mavic Crossmax Enduro wheels, so be sure to use the correct end of the black plastic back plate.
It doesn't need tools to fit as the magnet has ridged edges to aid grip. If you have painted spoke you may want to place a piece of tape round the spoke to protect it from the metal magnet holder rubbing the paint off the spoke as you tighten it.
The magnet appears to be Neodymium and is certainly more powerful than the old style spoke magnets that used ferrite magnets. This makes it easier to set up as the positioning is not so critical.

Jul 02, 2017
Impressed
Listing states aftermarket, but I can't tell the difference between this and an OE mirror. Very happy with my purchase.

Jan 18, 2018
Easy to use, money saving tool
It is important to replace a worn chain to avoid excessive wear to the cassette and chainrings that are far more costly.
I've been putting off buying one of these and relying upon measuring the increased length of the chain to isolate roller wear. This tool makes it so much easier and quicker. It only took me a couple of minutes to check the chains on our 6 bikes and I now feel that roller wear is relevant to protecting the rest of the drivetrain.
Simply insert the hook into one of the wider holes on the top of the chain and lower the other end onto the chain. If it slots in to it's full depth it has failed that test. Test for 1.0% on single speeds and 0.75% with 7, 8, 9 or 10 speed chains.
My new bike/chains passed the .75% test, the well used chains failed, but passed the 1% test and my old pub bike failed both. So it confirmed my expectation that I need 3 new chains as they are all running 7, 8, 9 or 10 speed cassettes. (It is recommended that chains for 11 or 12 speed cassettes are changed at 0.5%, for which you would require a different indicator).