Another wheel day (and so on).
A customer left me a rear wheel built with a carbon hookless rim.
It's a 700C rim, but with an internal width of 25mm,
so it's more for 29-inch MTBs than for disc road bikes.
That said, brands like ZIPP already have hookless rim disc road wheels
with 25mm internal widths available.
The hub is 148mm wide and uses the BOOST standard.
The rim has a brand, but it seems like someone wants to keep it quiet,
so I won't dig into it.
Now, this rim...
It buckled and cracked badly, so when the customer contacted the manufacturer or retailer,
they sent the same rim as a replacement,
and the customer asked our shop to swap out the rim.
The rim that arrived was identical to the original, but unbranded.
It's an offset rim with the rim apex shifted to one side,
but the hole positioning isn't quite as offset as the rim's appearance suggests.
↑Rim viewed from the freewheel side
↑Rim viewed from the non-freewheel side
↑Non-freewheel side
↑Freewheel side
This is from after the rebuild, jumping ahead in timeline,
but because the outer holes are centered while
the inner holes are offset,
this was a tricky rim to set up the nipples on.
The spoke length just reaches the slot in the nipples,
so it's right at the short end of the acceptable range,
and after rebuilding, it's tensioned about one nipple turn higher than before,
so the original state was slightly short.
By the way, the spoke lengths on both sides were the same.
Because there was little difference in spoke tension between left and right,
I thought the rim was pulled toward the non-freewheel side,
and that turned out to be true, but it was minimal.
It seems I just got that impression because it's an offset rim.
The spokes are MAC spokes aero straight, the same
type used in current Dura-Ace wheels—
an aero spoke with a smaller specific gravity compared to
CX-RAY or Aerolight.
However, the plain section on the rim end is longer,
increasing the adjustment range via cutting, and these spokes appear to be used
uncut or nearly uncut,
so all things considered, they might not be that different from CX-RAY.
Moving the rim over...
The reason the order wasn't transferred cleanly is that
some nipples have fine sand packed in their recesses,
not seized but looking similar, making them difficult to loosen,
so I postponed those.
Built.
Spoke tension is slightly higher than before,
and as expected, the wheel is centered.
A customer left me a rear wheel built with a carbon hookless rim.
It's a 700C rim, but with an internal width of 25mm,
so it's more for 29-inch MTBs than for disc road bikes.
That said, brands like ZIPP already have hookless rim disc road wheels
with 25mm internal widths available.
The hub is 148mm wide and uses the BOOST standard.
The rim has a brand, but it seems like someone wants to keep it quiet,
so I won't dig into it.
Now, this rim...
It buckled and cracked badly, so when the customer contacted the manufacturer or retailer,
they sent the same rim as a replacement,
and the customer asked our shop to swap out the rim.
The rim that arrived was identical to the original, but unbranded.
It's an offset rim with the rim apex shifted to one side,
but the hole positioning isn't quite as offset as the rim's appearance suggests.
↑Rim viewed from the freewheel side
↑Rim viewed from the non-freewheel side
↑Non-freewheel side
↑Freewheel side
This is from after the rebuild, jumping ahead in timeline,
but because the outer holes are centered while
the inner holes are offset,
this was a tricky rim to set up the nipples on.
The spoke length just reaches the slot in the nipples,
so it's right at the short end of the acceptable range,
and after rebuilding, it's tensioned about one nipple turn higher than before,
so the original state was slightly short.
By the way, the spoke lengths on both sides were the same.
Because there was little difference in spoke tension between left and right,
I thought the rim was pulled toward the non-freewheel side,
and that turned out to be true, but it was minimal.
It seems I just got that impression because it's an offset rim.
The spokes are MAC spokes aero straight, the same
type used in current Dura-Ace wheels—
an aero spoke with a smaller specific gravity compared to
CX-RAY or Aerolight.
However, the plain section on the rim end is longer,
increasing the adjustment range via cutting, and these spokes appear to be used
uncut or nearly uncut,
so all things considered, they might not be that different from CX-RAY.
Moving the rim over...
The reason the order wasn't transferred cleanly is that
some nipples have fine sand packed in their recesses,
not seized but looking similar, making them difficult to loosen,
so I postponed those.
Built.
Spoke tension is slightly higher than before,
and as expected, the wheel is centered.