Another day, another wheel build (and so on).
A customer dropped off a pair of ZIPP rims with me—a 340 and a 440.
In terms of rim depth, they're equivalent to the current 303 and 404.
Both are 24-hole, so the shallower 340 was destined for the front wheel.
I've got a 340 myself, but based on the label's date code,
mine's a slightly later model.
This rim—it takes tension better than the subsequent MID-V280 or 285,
but it's not one of those modern carbon rims that practically begs to be tensioned up.
I happen to know (for reasons I'd rather not get into) exactly where this rim's breaking point is,
so I finish the build before reaching that limit,
but even so there's this nerve-wracking feeling of walking on thin ice.
Built it on an Evolite hub, 24-hole, CX-RAY outpoke radial lacing.
The holes around the rim are barely wide enough for the nipples to pass through,
so you can't even fit a washer between the nipple and the rim.
Also, as what appears to be a design choice to address buckling and brake compression forces,
there's foam urethane filling only in the brake zone area, but
unlike a Kolima, which only clears a path for the nipple,
the inside actually has quite a bit of hollow space.
This rim is, as far as I know,
the single most frustrating rim to fish a nipple out of if you drop one in.
（The 440 is slightly more merciful due to its greater height.）
I didn't make that mistake this time around, but
looking at the diagram I drew makes me mad.
Why's it gotta bounce around like it's happy? Just get out already.
A customer dropped off a pair of ZIPP rims with me—a 340 and a 440.
In terms of rim depth, they're equivalent to the current 303 and 404.
Both are 24-hole, so the shallower 340 was destined for the front wheel.
I've got a 340 myself, but based on the label's date code,
mine's a slightly later model.
This rim—it takes tension better than the subsequent MID-V280 or 285,
but it's not one of those modern carbon rims that practically begs to be tensioned up.
I happen to know (for reasons I'd rather not get into) exactly where this rim's breaking point is,
so I finish the build before reaching that limit,
but even so there's this nerve-wracking feeling of walking on thin ice.
Built it on an Evolite hub, 24-hole, CX-RAY outpoke radial lacing.
The holes around the rim are barely wide enough for the nipples to pass through,
so you can't even fit a washer between the nipple and the rim.
Also, as what appears to be a design choice to address buckling and brake compression forces,
there's foam urethane filling only in the brake zone area, but
unlike a Kolima, which only clears a path for the nipple,
the inside actually has quite a bit of hollow space.
This rim is, as far as I know,
the single most frustrating rim to fish a nipple out of if you drop one in.
（The 440 is slightly more merciful due to its greater height.）
I didn't make that mistake this time around, but
looking at the diagram I drew makes me mad.
Why's it gotta bounce around like it's happy? Just get out already.