Pannier Bracket Bolt Broke - Ducati Supersport 939 Forum
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post #1 of 85 (permalink) Old 03-15-2019, 02:20 PM Thread Starter
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Pannier Bracket Bolt Broke

At least two Members have experienced a sheared pannier bracket stabilizer bolt. I posted about mine breaking some time during my last trip, but just got around to replacing it a few minutes ago.

Fortunately, itís not the main support for the panniers. And the panniers are quite stable even with the bolt sheared off, but still, they should have designed-in a heftier bolt for this purpose.

Some pics on the next post.

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post #2 of 85 (permalink) Old 03-15-2019, 02:23 PM Thread Starter
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The bolt attaches to the bracket I’m holding at the left side to the main support frame.


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post #3 of 85 (permalink) Old 03-15-2019, 02:25 PM
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Is that from over torque or load. I had one snap like that on a different bike from overloading.
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post #4 of 85 (permalink) Old 03-15-2019, 04:09 PM
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I had one of mine break, I replaced both of them with HT bolts instead of the cheese the OEM ones are made from. I reckon it's from overload due to sheer. They are only M6, I must inspect the frames and see if there is enough metal to up the size to M8.
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post #5 of 85 (permalink) Old 03-15-2019, 08:44 PM
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I had one of mine break, I replaced both of them with HT bolts instead of the cheese the OEM ones are made from. I reckon it's from overload due to sheer. They are only M6, I must inspect the frames and see if there is enough metal to up the size to M8.
I'd do the same if it happened to me, but only for the better quality of steel.

These are breaking from shear force, not tension. (sorry, I'm pedantic about stuff like that).

That having been said, I wonder if some form of rubber washer or other damping would help the longevity?
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post #6 of 85 (permalink) Old 03-15-2019, 11:27 PM
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I'd do the same if it happened to me, but only for the better quality of steel.

These are breaking from shear force, not tension. (sorry, I'm pedantic about stuff like that).

That having been said, I wonder if some form of rubber washer or other damping would help the longevity?
I think it sucks. These bags are premium money yet they can't hold up to normal wear? WTF?
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post #7 of 85 (permalink) Old 03-16-2019, 09:46 AM
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I think it sucks. These bags are premium money yet they can't hold up to normal wear? WTF?
While I agree with you, I think @Derek 's solution would permanently fix the problem. But, you're probably thinking, "why should this be my problem to fix in the first place?" Well, I agree with that, too, but at least we can fairly easily, I suppose.
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post #8 of 85 (permalink) Old 03-16-2019, 11:23 AM
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I am curious about the wear pattern.
Did the failures occur with frequent use of saddle bags or infrequent?
Were the failures related to heavy loads in the bags?

I look forward to remedy and prevention to replace and upgrade these bolts.
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post #9 of 85 (permalink) Old 03-16-2019, 12:04 PM Thread Starter
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Would also assume shear load, but I guess itís poss tension. The torque wrench I used to install them isnít the greatest, and the torque is very low on these.

Also noticed when installing this right side section only, even though adjoining pieces were loose when installing to adjust fit, it doesnít align perfectly. So it starts off with some shear load. Left seems to align better.

Was it your right side that broke too @Derek ? The other Forum memberís was right side like mine.

This one broke on my trip to Newfoundland. Both bags were heavily loaded for a 3 week trip, but one also had lots of tools. But I donít recall if it was the side that broke had the tools.

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post #10 of 85 (permalink) Old 03-17-2019, 06:52 AM
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I'm pretty sure it was the left side on mine. I did notice the alignment problem and tweaked the side pieces from the pillion hanger mounts for a better fit.
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