Another day with wheels (and so on).
A customer entrusted me with the front wheel from a WH-R8170-C50-TL.
It was purchased before the price increase at the end of 2022.
This front wheel is really just a choice to get a cheap rim—it's just material for building a rear wheel.
Shimano's current Dura-Ace and Ultegra disc brake complete wheels are both 24-hole front and rear,
but the front wheel uses an equal-sided pattern (left-right ×12 repetitions),
while the rear wheel uses a 2:1 pattern (right-left-right ×8 repetitions).
With Campagnolo's Bora DB or Bora WTO DB wheels,
both front and rear are 24-hole built with G3 pattern, a type of 2:1 lacing,
but when you check the spare parts, the rim is a single type suitable for both front and rear.
The direction in which the spoke holes are offset outward on the fewer-spoke side differs between front and rear wheels.
Since this offset is quite substantial, you can't accidentally build them in reverse.
Now, with Shimano's disc brake wheels,
the rim part numbers as spare parts are different between front and rear.
Looking at just the rim from the disassembled front wheel, there doesn't appear to be any offset on either side.
I've also disassembled the rear wheel before, but instead of the typical 2:1 lacing pattern
with offset only on the fewer-spoke side (right-left-right),
it didn't even have that kind of offset—it was more like center-left-center.
In fact, I once had someone ask me to do something about how sloppy
a WH-R8170 rear wheel was,
and even though it was originally built as a 2:1 pattern,
I rebuilt it with an equal-sided lacing pattern.
I got feedback on that job later, and they said it was completely different.
It's built.
Finally arrived—Revo disc hub in 24-hole,
built with semi-competition 24-hole JIS lacing.
Rainbow-pattern (VAS arrangement) nipples.
I'll do the truing later.
A customer entrusted me with the front wheel from a WH-R8170-C50-TL.
It was purchased before the price increase at the end of 2022.
This front wheel is really just a choice to get a cheap rim—it's just material for building a rear wheel.
Shimano's current Dura-Ace and Ultegra disc brake complete wheels are both 24-hole front and rear,
but the front wheel uses an equal-sided pattern (left-right ×12 repetitions),
while the rear wheel uses a 2:1 pattern (right-left-right ×8 repetitions).
With Campagnolo's Bora DB or Bora WTO DB wheels,
both front and rear are 24-hole built with G3 pattern, a type of 2:1 lacing,
but when you check the spare parts, the rim is a single type suitable for both front and rear.
The direction in which the spoke holes are offset outward on the fewer-spoke side differs between front and rear wheels.
Since this offset is quite substantial, you can't accidentally build them in reverse.
Now, with Shimano's disc brake wheels,
the rim part numbers as spare parts are different between front and rear.
Looking at just the rim from the disassembled front wheel, there doesn't appear to be any offset on either side.
I've also disassembled the rear wheel before, but instead of the typical 2:1 lacing pattern
with offset only on the fewer-spoke side (right-left-right),
it didn't even have that kind of offset—it was more like center-left-center.
In fact, I once had someone ask me to do something about how sloppy
a WH-R8170 rear wheel was,
and even though it was originally built as a 2:1 pattern,
I rebuilt it with an equal-sided lacing pattern.
I got feedback on that job later, and they said it was completely different.
It's built.
Finally arrived—Revo disc hub in 24-hole,
built with semi-competition 24-hole JIS lacing.
Rainbow-pattern (VAS arrangement) nipples.
I'll do the truing later.