Disc rotor lockring woes

robbytres

Hi, I am building a new bike and its almost done have just hit one snag which I need to sort out before it's ready to roll! I have some 12mm thru axle wheels and centrelock shimano disc brakes. The problem is on the front wheel in that the usual cassette tool won't fit over the axle as the metal wall is slightly too thick, and I can't use the alternative type of lockring with the teeth on the outside as the raised edge on this rubs agains the inside of the fork.

I *think* I need something like the Park Tools FR-5.2GT...could anyone confirm or offer an alternative suggestion?

cycleclinic

Most cassette lockrings tools are not thin walled enough to be useful with thru axles. It does depend on your end cap though what if any tool will work.

If the other type of locking does not fit then that fork is rubbish and should not be on the market since it meant for thru axle hubs. A design flaw I think.

StillGoing

Not quite clear what you're trying to post? With centre lock discs, its usually an internal drive the same size as the cassette lock ring tool, or an external lock ring that doesn't use a cassette lock ring tool and uses a BB tool.

http://www.chainreactioncycles.com/shim ... p-prod1056

https://www.alltricks.fr/F-11929-outill ... e_pedalier

http://www.jensonusa.com/Shimano-TL-FC3 ... ation-Tool

https://www.sigmasports.com/item/BBB/Lo ... -Tool/13SS

cycleclinic

Yes that is known but the external type lockrings fouls the the fork.

robbytres

Hi Malcolm this is on the Borg45s which I am trying to get on the Specialized S-works Roubaix frame.

Nick Payne

I have two Shimano cassette lockring tools that work fine on all the thru axle wheels I have. One has the model number TL-HG16 stamped on it, the other just says "Shimano UG Freewheel". The first one has a pin guide in the centre that fits down a quick release axle to keep the tool centred, the other doesn't, but they both fit over thru axles.

StillGoing

thecycleclinic wrote:

Yes that is known but the external type lockrings fouls the the fork.

Presumably the OP needs 6 bolt type disc wheels then?

keef66

robbytres wrote:

Hi, I am building a new bike and its almost done have just hit one snag which I need to sort out before it's ready to roll! I have some 12mm thru axle wheels and centrelock shimano disc brakes. The problem is on the front wheel in that the usual cassette tool won't fit over the axle as the metal wall is slightly too thick, and I can't use the alternative type of lockring with the teeth on the outside as the raised edge on this rubs agains the inside of the fork.

I *think* I need something like the Park Tools FR-5.2GT...could anyone confirm or offer an alternative suggestion?

I have next to no experience with discs or thru axles, but I've read a near identical thread on here recently, and the answer was the thinner walled Park Tool, er, tool.

keef66

Here you go:

viewtopic.php?f=40004&t=13091582&p=20335621&hilit=disc+rotor+lockring#p20335621

"I can confirm that the Park 5.2 tool fits "

robbytres

Thanks very much, will give it a try.

robbytres

Just on the offchance I popped in to the LBS and they sorted me with a thin lockring with external teeth but without the lip which was catching on the fork.

TFFT, I can now ride it properly

Thanks to all for the advice.

cycleclinic

Glad that's sorted but still the problem here is the fork. If it that special it should come with a locking.