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Center lock brake discs

Old 06-03-19, 10:12 PM
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MarcusT
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Center lock brake discs

With my new MTB came Shimano center lock disc brakes. The tools to remove/mount them are confusing.
The tools I have seen resemble cassette removal tools, but the ring on my disc resembles a hollowtech bottom bracket mount
A little help?

Thanks
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Old 06-03-19, 10:23 PM
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HerrKaLeun
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The larger axles require the larger BB tool. Like a 20 mm front axle. Smaller axles, like QR, get by with the smaller cassette tool.
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Old 06-03-19, 10:24 PM
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Shimano lock rings use the cassette tool. Non-Shimano uses rings use a spanner.

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Old 06-03-19, 10:25 PM
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Originally Posted by HerrKaLeun View Post
The larger axles require the larger BB tool. Like a 20 mm front axle. Smaller axles, like QR, get by with the smaller cassette tool.
So a Shimano Hollowtech BB tool would work?
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Old 06-04-19, 12:20 AM
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Originally Posted by MarcusT View Post
So a Shimano Hollowtech BB tool would work?
Yes.

https://www.parktool.com/blog/repair...icle-section-3

Originally Posted by August West View Post
Shimano lock rings use the cassette tool. Non-Shimano uses rings use a spanner.
Shimano makes lockrings that use a bottom bracket tools and cassette tools.

.

Last edited by cobba; 06-04-19 at 12:29 AM.
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Old 06-04-19, 11:19 AM
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so you have a through axle wheel in a through axle frame and fork ?

the one using the cassette lock ring tool is conventional Skewer QR hubs..

I just have that style , shop tool has a center pin that goes in the hollow axle .. so it wont slip ..

shimano has a splined freewheel removal tool , no pin, more portable.






....
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Old 06-04-19, 02:39 PM
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Originally Posted by MarcusT View Post
With my new MTB came Shimano center lock disc brakes. The tools to remove/mount them are confusing.
The tools I have seen resemble cassette removal tools, but the ring on my disc resembles a hollowtech bottom bracket mount
A little help?

Thanks

A bit confused with the question, is there one? wondering, why didn't you ask the shop you got it from, when you got it, and why would you need to remove the rotors, as a new bike isn't going to need new rotors for hopefully a very long time.

Would avoid calling the brakes centerlock, as it's only the rotor which is, the caliper will work with 6 bolt or centerlock, as long as the rotor is the correct size.
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Old 06-04-19, 02:54 PM
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The cassette-style lockring isn't just for QR. It will also work with 12mm through axles. If you couldn't do this, then you wouldn't even be able to mount an actual cassette on a 12mm rear wheel. The larger BB-style lockring will, I think, work with any size axle, from QR to 20mm and maybe more. Despite that, I still prefer the cassette style if I can get away with it because a lot of the oversized lockrings are very thin and I feel the limited spline engagement is just asking for trouble. For example I have some Shimano lockrings where the splined flange is like 2mm thick at most. If that gets stripped, you are going to have a bear of a time getting the rotor off.
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Old 06-04-19, 10:09 PM
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Thanks for the input. I got it
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