Friedrich

squirtdad

not repairable Dead

Russ Roth

If those are cracks around 9 and 3, the simplest repair is a new wheel. Doubt there's anything special enough about the hub to worry about saving it and the cost of a replacement rim plus rebuild is probably the cost of a new wheel.

Trakhak

If you want an exact replacement, look on the Reynolds Wheels website.

Dan Burkhart 

What I get from the photo is one missing spoke and a broken rim. if the hub is in good shape, it can be rebuilt with a new rim, (any 50mm 24 hole rim does not have to be Reynolds).. It's the sort of job I do routinely.

FBinNY 

You might get more specific answers if you offered details about what needs fixing.

All I see is a photo of a wheel, which may or may not be perfectly OK.

easyupbug 

Cracks at 2:30 and 9:00 make it a very dead rim and at least one spoke gave up as well, probably can be rebuilt but not cheap, perhaps only hope is finding a good used replacement.

Duragrouch

Agree with all above. Interesting failure mode; Usually rims fail by cracks at spoke hole. The cracks shown are in areas loaded in tension as the wheel rolls. The deep rim section makes it a lot stiffer in bending that way, and increases the tension loads on the inside diameter. (sometimes more flex actually reduces stress) So could be fatigue failure, or just pothole impact load, however given there are two cracks, I'm thinking fatigue. How many miles on the rim?

FBinNY 

Finally got a chance to look more closely at the photo. While I don't know what it implies, I find it very curious that the 2 "cracks" are just about 180 degrees apart, and perfectly straight and exactly radial. So I suspect something more closely related to how the rim was made than to some event later on.

Duragrouch

Straight and radial makes sense to me if failure due to excessive tension on the inside diameter of the rim due to high bending loads. Regarding 180 degrees apart, just a guess, but larger crack hitting pothole on bottom, and smaller crack due to high spoke yanking loads directly above on top? But a deep section rim like that is immensely strong (unless really thin material), so I think spoke would break before rim, but who knows. Crack at valve hole and opposite where rim is joined? (I can't see hole location) Interesting though. Gosh it's been too long since I studied fatigue failures, but IIRC, high peak loads, even if low occurance, can affect fatigue life. Then again, sometimes an overload can do the opposite, stress relieve the area to prevent fatigue failure, that happened with the DeHavilland Comet; they used the same fuselage test sample, first for overload pressure test, and unknown to them it yielded very slightly and stress relieved a high load area, then ran fatigue tests on the same sample, passed with flying colors. Plane goes into production, fuselages not subjected to same overload test, failed in fatigue on two planes.

I find part failure cases interesting. My equivalent of reading mystery novels.

Duragrouch

I guess I'll binge-watch Bad Breaking.

grumpus

I thought that at first, but they appear to be only approximately 180° apart and I don't think the crack on the right is straight.

spclark 

Those cracks only on the side facing camera? What's the other side look like?

zacster

This is a BF pet peeve of mine. Someone posting a photo that is usually completely out of focus, at a strange angle, at not enough angles, and/or too small to be useful, and then asking a generic question.

spclark 

Yeah, well....

OP's fairly new, maybe's just curious or asking "for a friend" kinda thing.

I'd like to see a couple close-ups too of those cracks, and some taken of the other side where those cracks appear. Maybe the broken spoke's hole as well.

We often learn from others' mistakes after all, don't we?

Duragrouch

Darned good question. If the cracks on this side were on the rim flange, it might be different on the other side. But since the crack is originating from the inner V of the rim where both sides converge, I think very likely the crack exists on both sides. However, if there were no cracks on the other side, that's important, as it may indicate lateral forces on the rim, either high magnitude and/or high occurance, instead of the crack being from radial forces. Like from using the wheel as fulcrum points to straighten a bent frame. (referencing another thread)