More wheel building today (and so on).
I built two rear wheels using DT 585 rims.
Before that, let me explain the specs. The rims are DT 585, spokes are DT Competition, and nipples are brass—everything except the hub is identical.
One hub is an FH-7402 Dura-Ace,
and the other is an FH-T660 LX hub modified to OLD 130mm.
When I align the right flanges:
You can see the LX hub's flange is slightly wider.
At this degree of difference, there's not much impact on wheel lateral stiffness though.
Now aligning at the right dropout end:
The modified LX hub has a significantly narrower right flange width.
When you modify an OLD 135mm hub down to 130mm,
this is what happens relative to a standard road hub.
The actual difference in right flange width is 2.2mm.
This relates to what I wrote yesterday—many of Shimano's 11-speed hubs
have extended freebodies, resulting in a right flange width
similar to this modified LX.
Built them.
These are wheels for the same customer, and while technically a customer (don't say "technically")
since he's also an old racing buddy,
he's agreed to let me do some experimental work here.
I built the Dura-Ace hub with 6x6 lacing,
and the modified LX hub with 4x8 lacing.
↑Modified LX is 4x8 lacing
↑Dura-Ace is 6x6 lacing
For the Dura-Ace 6x6, basically it's standard 6-spoke lacing on both sides.
Since the spokes are the same left and right, I can compare apparent spoke tensions,
and the result was freeride side 121 : non-freeride side 95.
I'll use this as the reference.
(The non-freeride side is about 78% of the freeride side,
but the true spoke tension after conversion doesn't work out to exactly 100:78.)
For the modified LX 4x8 lacing, I built it to match the freeride-side spoke tension of the Dura-Ace 6x6.
With 4x8 lacing, the non-freeride side spokes are expected to achieve
higher tension.
The result was freeride side 125 : non-freeride side 98.
Hmm? Almost the same.
The right flange moved inboard by about 2mm, worsening the dishing geometry, and the 4x8 lacing pretty much just cancelled that out.
Recent Shimano 11-speed hubs often have right flange widths similar to
this modified LX, so my conclusion is that equal-spoke-count lacing on both sides
is getting pretty difficult with modern hubs.
I built two rear wheels using DT 585 rims.
Before that, let me explain the specs. The rims are DT 585, spokes are DT Competition, and nipples are brass—everything except the hub is identical.
One hub is an FH-7402 Dura-Ace,
and the other is an FH-T660 LX hub modified to OLD 130mm.
When I align the right flanges:
You can see the LX hub's flange is slightly wider.
At this degree of difference, there's not much impact on wheel lateral stiffness though.
Now aligning at the right dropout end:
The modified LX hub has a significantly narrower right flange width.
When you modify an OLD 135mm hub down to 130mm,
this is what happens relative to a standard road hub.
The actual difference in right flange width is 2.2mm.
This relates to what I wrote yesterday—many of Shimano's 11-speed hubs
have extended freebodies, resulting in a right flange width
similar to this modified LX.
Built them.
These are wheels for the same customer, and while technically a customer (don't say "technically")
since he's also an old racing buddy,
he's agreed to let me do some experimental work here.
I built the Dura-Ace hub with 6x6 lacing,
and the modified LX hub with 4x8 lacing.
↑Modified LX is 4x8 lacing
↑Dura-Ace is 6x6 lacing
For the Dura-Ace 6x6, basically it's standard 6-spoke lacing on both sides.
Since the spokes are the same left and right, I can compare apparent spoke tensions,
and the result was freeride side 121 : non-freeride side 95.
I'll use this as the reference.
(The non-freeride side is about 78% of the freeride side,
but the true spoke tension after conversion doesn't work out to exactly 100:78.)
For the modified LX 4x8 lacing, I built it to match the freeride-side spoke tension of the Dura-Ace 6x6.
With 4x8 lacing, the non-freeride side spokes are expected to achieve
higher tension.
The result was freeride side 125 : non-freeride side 98.
Hmm? Almost the same.
The right flange moved inboard by about 2mm, worsening the dishing geometry, and the 4x8 lacing pretty much just cancelled that out.
Recent Shimano 11-speed hubs often have right flange widths similar to
this modified LX, so my conclusion is that equal-spoke-count lacing on both sides
is getting pretty difficult with modern hubs.