Well, another wheel-related job today (and so on).
A customer brought in the rear wheel from a ZIPPI 101.
Apparently the customer was fiddling with it here and there and ended up with terrible radial runout.
They said they didn't know what to do about it.
Indeed, there's so much lateral and radial runout that you'd suspect the rim itself is bent.
I don't think many people know that the title is the sequel to Babel II.
↑On the freewheel side, five consecutive spokes have severely twisted at the nipple end.
The nipples also have many spots where the 3.2mm tool grip faces are worn down,
but since these nipples can be adjusted from the outer circumference side,
I asked them not to adjust from the inner side in the future and reused them.
Without doing that, you can't get high enough tension on the freewheel side.
I disassembled half of the 10-hole side, so the spoke tension that was holding the flange ring released it,
and even the spokes I wasn't replacing came out of the flange.
From this state, when I shook the hub left and right,
the anti-freewheel side flange ring also came off and everything fell apart like this.
Since I reassembled from a state where the rim and hub were separated,
I ended up doing a complete wheel build. But since the frame is a separate issue, oh well.
There was a reason for disassembling it though.
If it were just a matter of messy handling causing radial runout, it'd be fixable,
but since the customer mentioned a collision with a mamachari (utility bicycle),
I wanted to disassemble the rim, check it against a glass surface plate, and see if the rim had any warping.
As it turned out, there was no play against the surface plate.
↑I replaced five spokes.
The top three in the image don't look that bent,
but they're still fairly twisted, just less so than the bottom two.
As for the lateral and radial runout, I was able to dial it in beautifully—like it was a brand new rim.
A customer brought in the rear wheel from a ZIPPI 101.
Apparently the customer was fiddling with it here and there and ended up with terrible radial runout.
They said they didn't know what to do about it.
Indeed, there's so much lateral and radial runout that you'd suspect the rim itself is bent.
I don't think many people know that the title is the sequel to Babel II.
↑On the freewheel side, five consecutive spokes have severely twisted at the nipple end.
The nipples also have many spots where the 3.2mm tool grip faces are worn down,
but since these nipples can be adjusted from the outer circumference side,
I asked them not to adjust from the inner side in the future and reused them.
Without doing that, you can't get high enough tension on the freewheel side.
I disassembled half of the 10-hole side, so the spoke tension that was holding the flange ring released it,
and even the spokes I wasn't replacing came out of the flange.
From this state, when I shook the hub left and right,
the anti-freewheel side flange ring also came off and everything fell apart like this.
Since I reassembled from a state where the rim and hub were separated,
I ended up doing a complete wheel build. But since the frame is a separate issue, oh well.
There was a reason for disassembling it though.
If it were just a matter of messy handling causing radial runout, it'd be fixable,
but since the customer mentioned a collision with a mamachari (utility bicycle),
I wanted to disassemble the rim, check it against a glass surface plate, and see if the rim had any warping.
As it turned out, there was no play against the surface plate.
↑I replaced five spokes.
The top three in the image don't look that bent,
but they're still fairly twisted, just less so than the bottom two.
As for the lateral and radial runout, I was able to dial it in beautifully—like it was a brand new rim.