Tool to quickly differentiate between the 8/9/10 speed Shimano HG freehub and the newer 11 speed width.
Shimano HG freehubs come in two conventionally available sizes - 8/9/10 speed and 11 speed. The difference is only 1.8mm so it's hard to visually gauge a freehub. This can be a problem if you grab a wheel for use with a road 11 speed drivetrain and find you can't install the last cog. Drop this on and the end of the freehub will line up with the end of the appropriate sizze. Quick and easy!
Which one to print? --------------------------
There are three versions that only differ in the wall thickness:
* Thin The first one, 0.8mm thickness should print with 2 walls on most printers with a 0.4mm nozzle and a slicer like Cura. * Thick The second choice, thicker 2mm walls if that floats your boat * PrusaMK3S 300 If you have a Prusa MK3/MK3S and want it done quick - slice this one at 0.3mm as the 1.13mm wall thickness gives you two walls. Winds up a little bit ugly as you can see in the photos, but it's still perfectly usable.