SRAM DUB Crankset removal

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SRAM DUB Crankset removal
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Posted: Jun 1, 2021 at 21:09 Quote
Rickyticky8810 wrote:
Hi there guys, I've had no problem in removing the 8mm, but i'm really struggling to take the crank apart from this part. Seems well jammed onto the spline - and tricks?

Finally removed the stuck 8mm nut, but same problem here, the drive side crank seems to be seized to the spindle. Cannot remove it already used a rubber mallet with no luck. Any suggestions?

Posted: Jun 1, 2021 at 21:53 Quote
Thread the 8mm bolt back on handtight only with grease. Apply grease to inside of removal cap. Thread removal cap back on the crank hand tight only and reverse thread. Turn the 8mm bolt counterclockwise until it is removed.

Posted: Jun 11, 2021 at 17:55 Quote
I have a 2021 Canyon Neuron with the Truvative stylo 6k DUB crank on the SRAM BSA DUB Threaded bottom bracket. I want to change the chainring to an oval. I finally did get the 8mm bolt out but, the drive side chainring and crank arm will not come free.
I noticed the 8mm bolt does NOT pull the arm off as most videos state. My 8mm bolt does not have any writing on it either. So - is the crank arm and chainring threaded onto the dub shaft? I don't want to bang on it hard and break something.

Posted: Jun 12, 2021 at 0:34 Quote
CWSMTB wrote:
I have a 2021 Canyon Neuron with the Truvative stylo 6k DUB crank on the SRAM BSA DUB Threaded bottom bracket. I want to change the chainring to an oval. I finally did get the 8mm bolt out but, the drive side chainring and crank arm will not come free.
I noticed the 8mm bolt does NOT pull the arm off as most videos state. My 8mm bolt does not have any writing on it either. So - is the crank arm and chainring threaded onto the dub shaft? I don't want to bang on it hard and break something.

https://youtu.be/eyIsmAeU96E

Posted: Jun 14, 2021 at 13:57 Quote
Ok so decides to by the sram dub bolt kit for $15 to avoid damaging the crank. With the self extractor screwed in place the crank came out without much hassle. I think that's the way to go. Too much risk trying to hammer stuff out.

Posted: Aug 3, 2021 at 19:18 Quote
Just need to say I’m bleeding slightly, sweating profusely, and extremely relieved to have removed my SRAM Dub crank for the last time. Promptly put on Shimano’s tried and true system. Never again.

Posted: Sep 22, 2021 at 11:55 Quote
Want to join in and share my experience.

I broke a hex bit like the one earlier in the thread, only I broke the bit holder and not the bit itself. I tried all the suggested techniques here without success. I got an impact 8mm hex bit but the supposed 250 ft-lb of breakaway torque from my wrench wasn't good enough to budge it. Putting the NDS crank on a block of wood and, with a guy sitting on the bike for added weight and support, I would just end up lifting the bike and guy.

Not sure if it helped, but I sprayed a penetrant from the NDS inside the crank to the threads.

I then bought a 1"x2"x48" rectangular steel tubing and put the NDS crank in it and rested it against the floor, with the bike upright. Then with a couple of pushes down on a breaker bar with the 8mm impact hex bit, and a couple of cracking noises, it finally broke free without a problem. Leverage is your friend.

So I figured I'd replace the bolt, especially since pounding it with an impact wrench wore down the soft Al hex hole. But I currently have a Park Tool SPA-2 pin spanner bending while trying to get the extraction cap off. Yes I'm applying force clockwise since it is left-hand thread.

Any suggestions on getting the extraction cap off?

EDIT: got the cap off. Used a bar clamp to hold the pin spanner on and put a pipe on the spanner for extra leverage. I had heated it up previously but I'm not sure it made a difference - no trace of any threadlocker on the threads, no sign of corrosion, just really tight.

Posted: Jan 28, 2022 at 16:48 Quote
Same problem as everyone else. Even with a long torque wrench, things were not moving and it was challenging to get the right position to hold down the crank arm and apply a lot of leverage on the hex bolt.

The solution was removing the outer retaining cap, breaking the 8mm hex bolt free (use any leverage method you want), regrease the hex bolt, put the hex bolt back in but only hand tight, coat the inner part of the retaining cap so that the hex bolt and retaining cap doesn't bind, put the retaining cap back on, now remove the 8mm hex bolt. It came right off.

Removing the retaining cap:
- Fortunately I didn't have any issues removing it
- As others have stated, it is reverse threaded
- ParkTool Pin-Spanner SPA-6 has the correct size pins for the holes
- Careful with this tool because if it slips it will leave a nice gouge in your crank arm

Posted: Jan 29, 2022 at 9:21 Quote
Read somewhere that replacing the (alloy?) stock bolt with a steel one can help. Picked up a couple for mine and my girlfriend's bikes, nice bonus is that the included retaining cover thing just uses a larger hex wrench instead of that awful pin spanner nonsense.

Haven't had to remove the cranks since installing the new bolts, but I'll report back when I do. Might give it a go just for curiosity's sake.

Posted: Jan 29, 2022 at 15:43 Quote
Yeah the issue was the alloy bolt galling. Steel fixes it.

Posted: Feb 19, 2022 at 2:14 Quote
XR4Ti wrote:
Want to join in and share my experience.
Yes I'm applying force clockwise since it is left-hand thread.


Pretty sure its a conventional thread so you should be turning anti-clockwise to remove the crank....

Posted: Feb 19, 2022 at 2:17 Quote
I've always been successful simply by making sure the left hand crank is horizontal, pointing to the rear wheel. Pop the Parktool HT-8 in horizontally, also pointing towards the rear wheel. Get on your bike, pull the brakes, feet on the pedal and tool, and give it a bit of a push. "Cracks" (with some disconcerting noise) loose 100% of the time. And don't over torque it when you replace it.

Posted: Mar 20, 2022 at 10:37 Quote
Does anyone know which Pin Spanner I need to tighten a SRAM Dub 8mm Hex / 54N-M Crank Plate (the one with the 4 holes) I know that there are several sizes and pretty sure I will order the wrong one. Thanks

Posted: Mar 20, 2022 at 11:28 Quote
Elphatjuan wrote:
Does anyone know which Pin Spanner I need to tighten a SRAM Dub 8mm Hex / 54N-M Crank Plate (the one with the 4 holes) I know that there are several sizes and pretty sure I will order the wrong one. Thanks

My xx1 uses a park tool spa 2

Posted: Apr 11, 2022 at 17:22 Quote
Yep on Spa 2, but to dumb it down it's the red one. I think someone makes a purpose built tool. I'd Google and price check it before buying the spanner.


 
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