Tools / Pumps » Cassette lockring tools

A cassette lockring tool is handy to have a long, I have had a cassette loosen up during a ride. Regular ones are heavy and require a heavy wrench to use.

Here are two that are tiny and do not use a wrench.

Unior Cassette tool

Unior Cassette toolStein cassette lockring tool

For more info, see: http://sheldonbrown.com/harris/tools/cassette.html

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Comments (5)

Tim McCabeJanuary 23rd, 2009 at 5:13 am

Looks pretty good, pricy tho

I have a Hypercracker around somewhere I carried it on my first AZT trip and used it a lot at first then I broke the rear D while using it.

On the second trip I ended up buying one of the regular ones and borrowed a wrench to use it the first time. Never needed it again but I figured it would be easy to find a wrench to borrow as long as I had the tool.

MikeCMay 6th, 2009 at 10:57 am

Red loctite on your cassette lockring, followed by judicious torque, removes 99.999% of the likelhood of the lockring coming loose for years on end. Still very easy to remove when needed.

A few drops of red loctite weighs a lot less than *any* just-in-case tool.

MC

protoceratopsJuly 8th, 2009 at 3:15 pm

True about the red Loctite…anaerobic, man! That means that it hardens in the absence of air, which is pretty slick. NEVER had a cassette ring let go since I started gluing them. I STILL carry the ‘cracker in case I have to replace a spoke on the drive side. The red Loctite does not help much for that…

GattoneroAugust 10th, 2015 at 2:55 pm

Uding Loctite on a cassette lockring is rather unnecessary.
The lockrings have a knurled inner surface (and sometimes even a milt steel ring, to further boost the coupling) to match the knurling on the last cassette sprocket.

Once things are tight enough (around 30Nm) the lockring won’t come loose. The only time it can, is when the cassette has been wrongly installed in the very first place. Which is not a reason to glue a retaining part.

Get it right, get it tight!

ogny0July 4th, 2016 at 5:21 am

I have used the Unior tool. However, one must be aware of the proper way of installing it unless s/he wants to break the dropout while unscrewing the lockring

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