Another day with wheels (and so on).
A customer left me with a rear wheel built with a Reynolds Stratos DV 26-inch tubular rim.
The hub is a PowerTap SL+.
It's built 20-hole, all-black Campagnolo Nuovo Record, reversed Italian-style lacing.
PowerTap hubs are principally forbidden from radial lacing,
and especially on the non-freewheel side it's strictly prohibited.
The Mavic pre-built wheels that were once built with Cosmic Carbon rims
had radial lacing on the freewheel side.
With large flanges and 10 holes on one side, the flange holes are far apart,
but even so, it seems they weren't able to weave the final crossing
of the pulling spokes and non-pulling spokes (though it's the first crossing anyway).
I disassembled it.
While I was at it, I cleaned the hub.
This hub and
The customer wanted to rebuild a wheel with the first-generation Ksyrium Elite 650C rear rim.
Mavic's patented technology of cutting coarse threads into the inner rim using a high-heat bit is called FORE technology,
and the first rim to adopt this was the original Ksyrium SSC.
Mavic has an MTB wheel called Crossmax,
but Crossmax existed before Ksyrium
and was originally built with steel spokes.
After the Ksyrium SSC came out, it became a "26-inch version of the Ksyrium SSC" sort of aluminum-spoke wheel,
but as a cheaper version there was a model called Crosslock with the specification
of "attaching an adapter to the FORE rim to use generic nipples."
The first-generation Ksyrium Elite had a road-bike-like specification similar to this Crosslock,
and is a wheel built with FORE rims using nipple adapters.
(Neither the current Ksyrium Elite nor the current Crosslock use this specification)
Now, even if the spoke hole count matches the hub,
there are cases where it's impossible to build a wheel with a FORE rear rim...
The Ksyrium rear rim has such strong directional properties in the FORE threaded holes
that it can only be built with radial lacing on the freewheel side.
Even with a true-center rim, building it reverse-centered is impossible.
Furthermore, because it's an offset rim, the threaded holes are positioned
taking into account the angles to the left and right flanges.
Therefore, even if it could be built, only zero-four lacing is possible,
which means the freewheel-side radial lacing that PowerTap principally forbids is unavoidable...
I was about to explain this to the customer when
↑it had no hole offset and wasn't an offset rim.
FORE-hole Ksyrium (excluding Equipe) comes in 18-hole front and 20-hole rear,
so this 20-hole rim is definitely a rear rim.
The directional properties from spoke trajectory to the hub
must be taken at the contact point between the adapter and nipple.
↑This is the adapter.
It has reverse threads so it won't loosen from nipple rotation.
You can tighten it into the rim with Mavic's tool.
↑This is where the nipple engages.
I got it built.
20-hole, semi-Campagnolo four-cross lacing, no spoke tape.
No spoke tape was the customer's request.
↑This is the spoke directionality.
The adapter FORE threaded holes are cut straight
along the radial line from the wheel center.
By the way, I mentioned the Reynolds rim at the beginning as 26-inch
and the Ksyrium Elite rim as 650C in this article,
but these have different origins and are not the same standard.
In the world of road racers (as a single type of bike), which originally had only 100% tubular rims,
bead-hook-type 700C-sized rims and tires were simply added later
in a size that could share frames, forks, and brakes.
So calling them "700C tubular" or "28-inch WO" is not strictly correct,
even if people understand what you mean.
In tire markings, there shouldn't be tubular tires marked as 650C
or WO tires marked as 26-inch.
(The 26-inch on general-purpose bikes is HE, not 26-inch WO)
A customer left me with a rear wheel built with a Reynolds Stratos DV 26-inch tubular rim.
The hub is a PowerTap SL+.
It's built 20-hole, all-black Campagnolo Nuovo Record, reversed Italian-style lacing.
PowerTap hubs are principally forbidden from radial lacing,
and especially on the non-freewheel side it's strictly prohibited.
The Mavic pre-built wheels that were once built with Cosmic Carbon rims
had radial lacing on the freewheel side.
With large flanges and 10 holes on one side, the flange holes are far apart,
but even so, it seems they weren't able to weave the final crossing
of the pulling spokes and non-pulling spokes (though it's the first crossing anyway).
I disassembled it.
While I was at it, I cleaned the hub.
This hub and
The customer wanted to rebuild a wheel with the first-generation Ksyrium Elite 650C rear rim.
Mavic's patented technology of cutting coarse threads into the inner rim using a high-heat bit is called FORE technology,
and the first rim to adopt this was the original Ksyrium SSC.
Mavic has an MTB wheel called Crossmax,
but Crossmax existed before Ksyrium
and was originally built with steel spokes.
After the Ksyrium SSC came out, it became a "26-inch version of the Ksyrium SSC" sort of aluminum-spoke wheel,
but as a cheaper version there was a model called Crosslock with the specification
of "attaching an adapter to the FORE rim to use generic nipples."
The first-generation Ksyrium Elite had a road-bike-like specification similar to this Crosslock,
and is a wheel built with FORE rims using nipple adapters.
(Neither the current Ksyrium Elite nor the current Crosslock use this specification)
Now, even if the spoke hole count matches the hub,
there are cases where it's impossible to build a wheel with a FORE rear rim...
The Ksyrium rear rim has such strong directional properties in the FORE threaded holes
that it can only be built with radial lacing on the freewheel side.
Even with a true-center rim, building it reverse-centered is impossible.
Furthermore, because it's an offset rim, the threaded holes are positioned
taking into account the angles to the left and right flanges.
Therefore, even if it could be built, only zero-four lacing is possible,
which means the freewheel-side radial lacing that PowerTap principally forbids is unavoidable...
I was about to explain this to the customer when
↑it had no hole offset and wasn't an offset rim.
FORE-hole Ksyrium (excluding Equipe) comes in 18-hole front and 20-hole rear,
so this 20-hole rim is definitely a rear rim.
The directional properties from spoke trajectory to the hub
must be taken at the contact point between the adapter and nipple.
↑This is the adapter.
It has reverse threads so it won't loosen from nipple rotation.
You can tighten it into the rim with Mavic's tool.
↑This is where the nipple engages.
I got it built.
20-hole, semi-Campagnolo four-cross lacing, no spoke tape.
No spoke tape was the customer's request.
↑This is the spoke directionality.
The adapter FORE threaded holes are cut straight
along the radial line from the wheel center.
By the way, I mentioned the Reynolds rim at the beginning as 26-inch
and the Ksyrium Elite rim as 650C in this article,
but these have different origins and are not the same standard.
In the world of road racers (as a single type of bike), which originally had only 100% tubular rims,
bead-hook-type 700C-sized rims and tires were simply added later
in a size that could share frames, forks, and brakes.
So calling them "700C tubular" or "28-inch WO" is not strictly correct,
even if people understand what you mean.
In tire markings, there shouldn't be tubular tires marked as 650C
or WO tires marked as 26-inch.
(The 26-inch on general-purpose bikes is HE, not 26-inch WO)