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Is this a DUB crank?

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Old 07-15-25 | 10:27 AM
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Is this a DUB crank?

I think I messed up when tired on ebay. At first glance I thought this was GXP but in the cold light of day I think I’ve bought a DUB version?



If so, question 2;
Does anyone have a preferred option for squeezing one of these into a road PF shell designed for 24mm axles? I’ve seen a few options none of which seem ideal.
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Old 07-15-25 | 10:44 AM
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Well, is the axle 24mm or 29mm?
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Old 07-15-25 | 11:01 AM
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Originally Posted by choddo
I think I messed up when tired on ebay. At first glance I thought this was GXP but in the cold light of day I think I’ve bought a DUB version?



If so, question 2;
Does anyone have a preferred option for squeezing one of these into a road PF shell designed for 24mm axles? I’ve seen a few options none of which seem ideal.
What is a "road PF shell for 24mm axles"? You mean like Trek BB90? I doubt you can run bearings in a 37mm shell for a 29mm spindle. That's 4mm.
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Old 07-15-25 | 01:17 PM
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Originally Posted by Kontact
What is a "road PF shell for 24mm axles"? You mean like Trek BB90? I doubt you can run bearings in a 37mm shell for a 29mm spindle. That's 4mm.
Like one you’d normally stick this in
https://www.bikeparts.co.uk/products...er-for-86-5-mm

This bloke

This is a Cube frame so suspect not the most precise alignment.

Last edited by choddo; 07-15-25 at 01:20 PM.
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Old 07-15-25 | 01:21 PM
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Originally Posted by Mackers
Well, is the axle 24mm or 29mm?
I won’t know until it arrives but it looks fat to me.
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Old 07-15-25 | 02:13 PM
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Cancel the order
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Old 07-15-25 | 02:46 PM
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Originally Posted by choddo
I won’t know until it arrives but it looks fat to me.
How about the rest of the pictures?

What kind of BB?

Don't make this a mystery.
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Old 07-15-25 | 02:55 PM
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Originally Posted by choddo
I think I messed up when tired on ebay. At first glance I thought this was GXP but in the cold light of day I think I’ve bought a DUB version?



If so, question 2;
Does anyone have a preferred option for squeezing one of these into a road PF shell designed for 24mm axles? I’ve seen a few options none of which seem ideal.
Those ^^^ look like GXP splines...
SRAM GXP Cranksets: An Engineering Guide - Hambini Engineering

...not DUB splines...
How To: Installing Sram Eagle DUB Crankset and Bottom Bracket | Worldwide Cyclery
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Old 07-15-25 | 03:32 PM
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Originally Posted by Kontact
How about the rest of the pictures?

What kind of BB?

Don't make this a mystery.
Rest of the pictures don’t show the axle, just the Quarq cranks and close-ups of the chainrings. But here’s the listing if it clarifies anything.

Sorry, I don’t quite understand the question. There is no BB, I’m asking what sort of BB might be best (or least worst) for this somewhat mismatched application should it turn out I bought the DUB version. But it sounds/looks from eric’s photos above like maybe my first half-asleep instinct was right and that is GXP which would be great as it’ll be a straight swap as there’s a GXP BB in there at the moment.

Can’t cancel the order, they shipped it while I was asleep
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Old 07-15-25 | 03:45 PM
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Interesting that it's a SRAM format crank with Shimano rings. Unless SRAM has different spline patterns for MTB DUB and road DUB, it looks to me like it's 24mm GXP. Good luck!
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Old 07-15-25 | 03:53 PM
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Originally Posted by choddo
rest of the pictures don’t show the axle, just the quarq cranks and close-ups of the chainrings. But here’s the listing if it clarifies anything.

Sorry, i don’t quite understand the question. There is no bb, i’m asking what sort of bb might be best (or least worst) for this somewhat mismatched application should it turn out i bought the dub version. But it sounds/looks from eric’s photos above like maybe my first half-asleep instinct was right and that is gxp which would be great as it’ll be a straight swap as there’s a gxp bb in there at the moment.

Can’t cancel the order, they shipped it while i was asleep :d
What brand and model frame is it you want to fit this crank into? The part where the frame attaches is also called the bb.

Link is dead.
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Old 07-15-25 | 03:55 PM
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Originally Posted by Eric F
Those ^^^ look like GXP splines...
SRAM GXP Cranksets: An Engineering Guide - Hambini Engineering

...not DUB splines...
How To: Installing Sram Eagle DUB Crankset and Bottom Bracket | Worldwide Cyclery
Totally. And I had forgotten Dub and GXP attach on opposite sides.
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Old 07-15-25 | 04:02 PM
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Originally Posted by Kontact
What brand and model frame is it you want to fit this crank into? The part where the frame attaches is also called the bb.

Link is dead.
Link worked for me. You have to click the second link - "see original listing". It doesn't show anything helpful, nor is there a description that indicates the format.

If sounds to me like it's going to work as intended. GXP replacing GXP.
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Old 07-15-25 | 06:25 PM
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Sure looks like GXP from here.
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Old 07-15-25 | 07:05 PM
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Dub is rounded splines, and they mesh into the drive side... spindle dia. looks under 1" too...

i think you're fine, choddo.

Last edited by maddog34; 07-15-25 at 07:09 PM.
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Old 07-16-25 | 03:04 AM
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Originally Posted by Kontact
What brand and model frame is it you want to fit this crank into? The part where the frame attaches is also called the bb.

Link is dead.
Oh weird. Just copied it from ebay before pasting. Maybe an ebay us vs uk issue

It’s BB86. The bike is a Cube Agree GTC 2015.
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Old 07-16-25 | 03:06 AM
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Haha oh yeah the DUB axle (spindle!) is attached to the NDS arm. Kind of a giveaway isn’t it, had no idea.

nice, thanks all.

Last edited by choddo; 07-17-25 at 01:34 AM.
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Old 07-16-25 | 06:53 AM
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Originally Posted by choddo
Oh weird. Just copied it from ebay before pasting. Maybe an ebay us vs uk issue

It’s BB86. The bike is a Cube Agree GTC 2015.
BB86 is just large enough to get bearings around a DUB spindle, while BB90 is not.
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Old 07-16-25 | 07:15 AM
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37 vs 41mm OD?
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