A customer brought in the front wheel of a Corima Aero Plus.
A while back they brought it in for front and rear wheel inspection,
but there was a problem with the front wheel so I didn't do any truing work.
It's a spoke-hook style front hub that's common on Corima, but
it had a crack in it.
I've seen a few cases of this on aluminum hubs before,
↑like this
↑and like this
but this is the first time I've seen it on a carbon hub.
If you look closely at those aluminum hubs above, they're not actually the same.
There's a difference in whether the transition from the hub body to the flange is angular or smooth.
When I removed the axle nut, the hub axle came right out
along with the bearing on the cracked side.
The crack had progressed all the way to the bearing press-fit area.
Unfortunately that was the end of it.
This front wheel is 18-hole with pair-spoke lacing, so
it would need to be rebuilt with a Corima pair-spoke 18-hole front hub,
which came up the other day...
The customer sourced a replacement hub and brought it in.
Apparently when they contacted Corima directly,
the warranty covered it.
The hub was different too—looks like it's a revised version.
The gray part is removable, and I thought,
"Here we go again with the spoke-hook style..."
but it was a straight-pull spoke setup.
The hub flange thickness is abnormally thick.
I wonder if something bad happened (playing dumb).
Completely irrelevant, but I love this quick release that came with the hub
Now, the original wheel has spoke hooks, so
if I loosen the nipples about half a turn, the hub can be removed.
I can't reuse these spokes, so
I checked my stock of straight spokes,
but I didn't have enough.
Since it's laced with CX-RAY equivalent spokes
(the original hook-style hub could also use CX equivalent spokes,
but the revised hub is through-spoke with no slots, so CX equivalent spokes can't be used),
normally I'd handle it with "310mm threadless that can be cut to 270mm CX-RAY straight,"
but since the hub and rim are matched, spoke length can be calculated.
Since I'm ordering anyway, I might as well order the exact length needed.
I calculated the length and ordered exactly 18 spokes at that length,
plus several dozen 310mm repair spokes
(lazy move, but I need them in stock anyway).
CX-RAY is distributed in even 2mm increments by Japanese distributors,
but I cut the ordered spokes by 1.5mm to use them.
The math worked out, so I was able to source
the shortest length within the range needed.
Built it up.
The revised hub body has CORIMA printed on it, so
I aligned it with the spoke orientation by looking through the valve hole.
A while back they brought it in for front and rear wheel inspection,
but there was a problem with the front wheel so I didn't do any truing work.
It's a spoke-hook style front hub that's common on Corima, but
it had a crack in it.
I've seen a few cases of this on aluminum hubs before,
↑like this
↑and like this
but this is the first time I've seen it on a carbon hub.
If you look closely at those aluminum hubs above, they're not actually the same.
There's a difference in whether the transition from the hub body to the flange is angular or smooth.
When I removed the axle nut, the hub axle came right out
along with the bearing on the cracked side.
The crack had progressed all the way to the bearing press-fit area.
Unfortunately that was the end of it.
This front wheel is 18-hole with pair-spoke lacing, so
it would need to be rebuilt with a Corima pair-spoke 18-hole front hub,
which came up the other day...
The customer sourced a replacement hub and brought it in.
Apparently when they contacted Corima directly,
the warranty covered it.
The hub was different too—looks like it's a revised version.
The gray part is removable, and I thought,
"Here we go again with the spoke-hook style..."
but it was a straight-pull spoke setup.
The hub flange thickness is abnormally thick.
I wonder if something bad happened (playing dumb).
Completely irrelevant, but I love this quick release that came with the hub
Now, the original wheel has spoke hooks, so
if I loosen the nipples about half a turn, the hub can be removed.
I can't reuse these spokes, so
I checked my stock of straight spokes,
but I didn't have enough.
Since it's laced with CX-RAY equivalent spokes
(the original hook-style hub could also use CX equivalent spokes,
but the revised hub is through-spoke with no slots, so CX equivalent spokes can't be used),
normally I'd handle it with "310mm threadless that can be cut to 270mm CX-RAY straight,"
but since the hub and rim are matched, spoke length can be calculated.
Since I'm ordering anyway, I might as well order the exact length needed.
I calculated the length and ordered exactly 18 spokes at that length,
plus several dozen 310mm repair spokes
(lazy move, but I need them in stock anyway).
CX-RAY is distributed in even 2mm increments by Japanese distributors,
but I cut the ordered spokes by 1.5mm to use them.
The math worked out, so I was able to source
the shortest length within the range needed.
Built it up.
The revised hub body has CORIMA printed on it, so
I aligned it with the spoke orientation by looking through the valve hole.