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I had my bike in a bike stand without wheels, clamped by the seat tube. As I loosened the stand mount lock the bike slipped out of my hand and suddenly rotated forwards as most of the weight was in front of the bike stand mount. I think the fork dropouts didn't contact the ground, as I believe I caught the bike before, but I can't be sure, and they're all scraped up as it is, so I can't tell by checking for scratches etc.

The front of the bike was around a meter/3 feet off the ground.

The fork is aluminium. There's no bending, cracks etc on the dropouts, they look just as they did before, wheel went in just fine too. Anything to worry about?

Here's an image to illustrate (not my bike):

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Here are my actual dropouts. Note that all the scratches, etc are not new, they've been there before

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    I'd be worried about the stand and how this happened, and whether or not it can be prevented next-time.
    – Criggie
    May 21 at 19:02
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    @Criggie The stand's clamp can be rotated to position the bike as desired, it was mostly my oversight not holding the bike properly when I unlocked the rotation, at that point the weight at the front of the bike pulled it down.
    – user4520
    May 21 at 19:15
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    @Criggie That looks like the power connector for a Shimano dynohub.
    – RLH
    May 22 at 2:35
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    From what I know about aluminum, it doesn't tend to crack and would rather bend, so if the wheel goes in and is true, there's probably not too much damage done. I see disc brakes, so if these haven't mysteriously started rubbing recently, the fork probably didn't get any damage at all. I'm not even sure if that impact was more force than a speedbump or pothole, so probably nothing to worry about....
    – DoNuT
    May 22 at 6:09
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    @arne With the pictures demonstrating that the impact can't have been great, and crucialy must have been in a sensible direction, I wouldn't worry. But the fork is designed to take those forces with the wheel in and not sideways so a workshop drop could be more serious and bend the fork. It could also chew up the dropout.
    – Chris H
    May 22 at 9:53

2 Answers 2

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Based on new photos - your bike looks fine to ride. There are no cracks visible and no mushrooming. Additionally there are no flat spots that would be created by striking the floor.

The impact was likely quite low speed, with the rear of the bike still supported by the clamp and workstand, even though it was rotating. I expect it was more of a surprise, and the front would also have been rotating not just descending.

Had the wheel been on, it would have been heavier and rotate faster, but with less distance to the ground and a rubber tyre to damp the impact.

If your stand were taller, the fork might have missed the ground completely.

If you're concerned about the visible metal, then clean it well and dab on some appropriately-coloured nail polish, or mask off the brake and sensors and chrome parts then hit with some spray paint. Normally I wouldn't bother but sometimes it feels nice to ride a tidy bike. Plus replacing the paint helps show future damage.

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Would say, and whole admit there is some risk here, if that's the bike in your pic then I wouldn't be too worried. That fork doesn't have dropouts, looks like it's got a thru axle configuration.

Based on that I would say the impact forces would have gone straight up the fork, even dampened the suspension somewhat. Probably find any damage would in most likelihood be cosmetic.

But I would not rule out something more structural based on one photo.

Might also be worth considering a rubberised mat for under your workstand to minimise drop damage, and smaller parts bouncing around when you drop them.

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    The photo is for illustrative purposes only, it's not my bike. Mine definitely has dropouts and a QR skewer
    – user4520
    May 21 at 21:28
  • Not sure if I should be leaving this answer here as was based on a couple false assumptions. Still valid for the original pic?
    – Hursey
    May 22 at 20:45

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