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Centerlock vs 6 bolt disc question...

Old 07-14-20, 09:20 AM
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chadtrent
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Centerlock vs 6 bolt disc question...

I am sure this is probably a dumb question, but I'm new to the world of disc brakes...

My current bike has 6 bolt discs. If I get a new set of wheels with centerlock, aside from having to buy the different discs for the wheel and making sure they are the same diameter, there shouldn't be any compatibility issues right?
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Old 07-14-20, 09:32 AM
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There shouldn't be. I have one wheelset of each for my main ride.

In practice, the rotors might sit in a slightly different position in space, relative to the bike frame. You can buy rotor shims (usually for the 6-bolt) to correct that. I think there might be rotor shims for center-lock, if you need those instead.

The worst case scenario is that you have to adjust the position of the caliper slightly after a wheel-change.
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Old 07-14-20, 09:38 AM
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If you want to continue using your current 6 bolt rotors or you want to buy another set of 6 bolt rotors, you can get adapters for using 6 bolt rotors on centerlock hubs.

https://bike.shimano.com/en-US/produ...SM-RTAD05.html
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Old 07-14-20, 10:28 AM
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wgscott is right -- the design specs would put the rotor in the same place, whether it's 6-bolt or centerlock. If one rotor has worn thinner or is off in some way, you'd just adjust the caliper a hair.
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Old 07-14-20, 12:06 PM
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One of many Centerlock to 6 bolt adapters ..
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Old 07-14-20, 01:00 PM
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What you want are CL wheels. You can get an adapter for 6 hole but nothing is available the other way around
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Old 07-14-20, 03:55 PM
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Originally Posted by quindecima View Post
What you want are CL wheels. You can get an adapter for 6 hole but nothing is available the other way around
Yeah. The wheelset I'm looking at is centerlock. The one currently on my bike is 6 bolt.


Thanks everyone for the replies.
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Old 07-14-20, 07:14 PM
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BTW it is not a stupid question at all. The answer is under-documented.
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Old 07-14-20, 08:03 PM
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In case you wanted a real world example, I swap out CL and 6b discs with no issues. Go for it!
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Old 07-15-20, 09:25 AM
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Originally Posted by walnutz View Post
In case you wanted a real world example, I swap out CL and 6b discs with no issues. Go for it!
That is my experience as well. My son raced NICA last year and I'd swap wheels on his bike between 6-bolt and centerlock, and the rotors were in the same place.
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