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Old 08-30-14, 12:50 PM   #1
mattk42
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Metal Clump On Inside of Alloy Rim

I picked this wheel up from the local coop to replace a steel rimmed rear and didn't notice these metal globs till later. (Probably something to do with being happy to find exactly what I was looking for.) There was a little bit more than pictured that easily broke off when poked at with a screwdriver. Sections on the uppermost part of the rim look almost a little sanded down, as do parts around the first glob pictured (you can see this sort of well in the second picture.)

Have any of you seen this sort of thing? Could something have sanded bits off and then they fused against the inside sidewall? Is this safe to use as is? I'd imagine the bead won't seat well around these globs. Should I try and remove the globs? Or is it all a lost cause? All helpful suggestions appreciated!



Another strange thing, the freewheel is 6 speed, but the OLD spacing is around 120mm. I thought it might be "narrow" spacing like Ultra 6, but the spacing between the gears is the same as the spacing on the 5 speed rear wheel this will hopefully be replacing. The freewheel says "Shimano 60" and the rim is an aluminum 27" Weinmann.
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Old 08-30-14, 01:00 PM   #2
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its where the hoop was welded .. just get out your hand files, Dremel, etc. and smooth it out.. the factory tooling cleaned up the outside.
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Old 08-30-14, 03:15 PM   #3
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Okay, thanks! It's not directly between two spoke holes though, which is where I usually see weld lines.
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Old 08-30-14, 03:23 PM   #4
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Quote:
Originally Posted by mattk42 View Post
Okay, thanks! It's not directly between two spoke holes though, which is where I usually see weld lines.
The joint that is usually welded is often, if not always, opposite the valve stem's hole. From the pictures it doesn't seem that the tire bead can seat properly. Can't tell for sure, however.

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Old 08-30-14, 03:57 PM   #5
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My personal experience with rims had been that the majority of the rims I had were not welded at the seams. I think lots of them are actually swaged to a small aluminum bridging piece inserted within the inner box section of the rim.
If that's not a weld you are looking at, it could also be a previous owner's attempt to smooth over a slight gap at the rim's seam with JB weld, maybe?
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Old 08-30-14, 04:53 PM   #6
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The globs aren't across from the valve stem hole, more like a quarter the way around. It's hard to tell whether the material is the same as the rim. It does look metallic though. I haven't put a tire on yet, but I would think it wouldn't seat well in that area, the globs come out to the edge of the bead hook on the rim. I guess I'll just have to take a file of sorts to it and see what happens.

Last edited by mattk42; 08-30-14 at 04:57 PM.
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Old 08-30-14, 05:11 PM   #7
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If it's not across from the valve hole, it could most likely be be an attempt to repair a crack or a bad dent, either with welding or JB Weld.
If it's a repair, it might be safer to consider not riding it anymore and replacing it.
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Old 08-30-14, 05:41 PM   #8
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Agreed. Looks like the rim is flat spotted there. I'll bet someone tried to fix it where it cracked. Probably took an impact.
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Old 08-30-14, 11:18 PM   #9
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It looks almost like it has been sanded in areas. Is that what a flat spot from an impact would look like? As far as I can tell it's radially true. I took a closer look at it again, as far as I can tell there aren't any cracks. But there appear to be two faint parallel strips that are lighter looking than the rim running directly across the rim. I could only just make them out on the hub side of the rim by angling it a certain way.

I think I'll end up taking by the coop to see what they think, though they'll doubtfully refund it. I should have been more observant.
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