I'm thinking about building Nomu Lab Wheel No. 4.
I'm considering building No. 4 using the Kinlin TB-25 tubular rim I built before.
Within the range of what I can source, 28H is the minimum spoke count,
so I'm planning to go with 28H front and rear.
When I previously built and sold about two pairs with 32H,
one customer brought in a 32H hub so I built that one with 32H,
and another customer wanted 28H but I only had 32H in stock and their race was coming up soon,
so I reluctantly built that one with 32H,
but this time I'd like to wait for a 28H shipment to arrive.
The image above is that latter one—"32H to make it in time for the race"—and
since I was going to build it with 32H anyway, I decided to tension it really tight
and I tried building it with Hoshi's discontinued aero spokes in a special Nupoke radial lacing pattern.
Since he's a racing buddy of mine, it was half joking around, but
he said "it's stiff and fast!" and I was surprised at how much he loved it (laughs).
For No. 4 spokes I'll be using DT Competition in straight-pull format,
so it'll basically be like No. 1 with the AL300 WO rim replaced by a tubular.
The price is also planned to be the same as No. 1—29,000 yen front and rear.
A setup similar to the image above is possible with Sapim CX. If you're interested, please let me know.
Since aluminum rim tubular wheels are limited to top-range offerings in complete wheel builds,
I wanted to propose wheels that are a bargain and lightweight (the outer rim weight is comparable to high-end aluminum complete wheels).
As for Nomu Lab Wheel No. 5, recently at Tni there's this
supposedly 380g aluminum rim called AL22.
I thought I'd like to build a lightweight aluminum rim WO wheel with this,
but it only comes in 32H.
Nomu Lab Wheel No. 1 uses the Tni AL300 rim in 20H
with a catalog weight of 460g, and the actual measured weight is around 460-462g.
The front wheel with DT Competition specs comes to 667g,
so I'd like to estimate the weight when building the AL22 rim with 32 Sapim CX-RAY spokes.
As mentioned above, a 2.0mm plain spoke weighs 0.0257g per mm, so
multiplying by the 276mm length when built with the AL300 gives the weight of one spoke.
（I'm keeping the actual length of 276mm a bit vague since it touches on trade secrets,
but the calculation is fine）
Then I multiply by the number of spokes, 20.
Further multiplying by the 90.3% weight ratio of DT Competition compared to 2.0mm plain
gives 128.1g.
So of No. 1's 667g,
128.1g comes from spoke weight.
I've mentioned the concept of spoke specific gravity several times in this blog, but
there's also the reasonable opinion that
"the specific gravity changes depending on the ratio of butted portion to total spoke length."
A 50mm CX-RAY and a 1000mm CX-RAY would have different proportions
of flattened sections relative to overall spoke length.
However, in reality, spoke lengths usable on 700C wheels are around 240-310mm.
Among those, the lengths I commonly use are around 272-296mm.
Within this range, I don't think it interferes with rough estimates.
I actually measured it under those conditions just now.
It differs from the estimate by 1.0g. I'd say this is "pretty accurate."
I'll proceed with the estimated value for the rest of this.
When building the AL22 rim with 32H compared to the AL300 rim with 20H,
the rim height is lower so spokes get longer, the spoke count increases by 12,
and on top of that we're switching to CX-RAY, which gives 149.6g.
Spoke weight increases by 21.5g.
It's not in the diagram above, but if we kept the spokes as they were instead of switching to CX-RAY,
it would be a 79.8g increase.
If the rim weight matches the catalog value of 380g, it comes to 608.5g.
Hmm. That's a tough call.
I could build it a bit lighter using DT Revolution,
but with this spoke, once you reach a certain spoke tension level,
it feels like the rim isn't being pulled but rather the spoke stretch is being converted.
The DT Revolution 2.0-1.5-2.0 coefficient is
around 64.2, 64.4, 64.5%, so I calculate at 64.4%.
With a difference this small, CX-RAY lets me build a much stiffer wheel,
so I basically don't use Revolution.
If I build it with the AL22 rim and it comes to 599g, getting into the 500g range
would be a nice round number that would make people think "wow, light!!"
But it looks a bit difficult. I could use a lighter hub,
but there's the matter of pricing, so it's tricky.
The number 599—it only looks special because we're looking at it in decimal.
In binary it's 1001010111, and in hexadecimal it's 257.
So much for that excuse (laughs).
Whether the AL22 rim becomes Nomu Lab Wheel No. 5 is still undecided (No. 4 is confirmed).
I'll source the rim once and build it.
↑But first I need to build the pre-orders for No. 1.
There's still an opportunity to source hubs before the end of the year, so I'm hoping to make it happen.
I'm considering building No. 4 using the Kinlin TB-25 tubular rim I built before.
Within the range of what I can source, 28H is the minimum spoke count,
so I'm planning to go with 28H front and rear.
When I previously built and sold about two pairs with 32H,
one customer brought in a 32H hub so I built that one with 32H,
and another customer wanted 28H but I only had 32H in stock and their race was coming up soon,
so I reluctantly built that one with 32H,
but this time I'd like to wait for a 28H shipment to arrive.
The image above is that latter one—"32H to make it in time for the race"—and
since I was going to build it with 32H anyway, I decided to tension it really tight
and I tried building it with Hoshi's discontinued aero spokes in a special Nupoke radial lacing pattern.
Since he's a racing buddy of mine, it was half joking around, but
he said "it's stiff and fast!" and I was surprised at how much he loved it (laughs).
For No. 4 spokes I'll be using DT Competition in straight-pull format,
so it'll basically be like No. 1 with the AL300 WO rim replaced by a tubular.
The price is also planned to be the same as No. 1—29,000 yen front and rear.
A setup similar to the image above is possible with Sapim CX. If you're interested, please let me know.
Since aluminum rim tubular wheels are limited to top-range offerings in complete wheel builds,
I wanted to propose wheels that are a bargain and lightweight (the outer rim weight is comparable to high-end aluminum complete wheels).
As for Nomu Lab Wheel No. 5, recently at Tni there's this
supposedly 380g aluminum rim called AL22.
I thought I'd like to build a lightweight aluminum rim WO wheel with this,
but it only comes in 32H.
Nomu Lab Wheel No. 1 uses the Tni AL300 rim in 20H
with a catalog weight of 460g, and the actual measured weight is around 460-462g.
The front wheel with DT Competition specs comes to 667g,
so I'd like to estimate the weight when building the AL22 rim with 32 Sapim CX-RAY spokes.
As mentioned above, a 2.0mm plain spoke weighs 0.0257g per mm, so
multiplying by the 276mm length when built with the AL300 gives the weight of one spoke.
（I'm keeping the actual length of 276mm a bit vague since it touches on trade secrets,
but the calculation is fine）
Then I multiply by the number of spokes, 20.
Further multiplying by the 90.3% weight ratio of DT Competition compared to 2.0mm plain
gives 128.1g.
So of No. 1's 667g,
128.1g comes from spoke weight.
I've mentioned the concept of spoke specific gravity several times in this blog, but
there's also the reasonable opinion that
"the specific gravity changes depending on the ratio of butted portion to total spoke length."
A 50mm CX-RAY and a 1000mm CX-RAY would have different proportions
of flattened sections relative to overall spoke length.
However, in reality, spoke lengths usable on 700C wheels are around 240-310mm.
Among those, the lengths I commonly use are around 272-296mm.
Within this range, I don't think it interferes with rough estimates.
I actually measured it under those conditions just now.
It differs from the estimate by 1.0g. I'd say this is "pretty accurate."
I'll proceed with the estimated value for the rest of this.
When building the AL22 rim with 32H compared to the AL300 rim with 20H,
the rim height is lower so spokes get longer, the spoke count increases by 12,
and on top of that we're switching to CX-RAY, which gives 149.6g.
Spoke weight increases by 21.5g.
It's not in the diagram above, but if we kept the spokes as they were instead of switching to CX-RAY,
it would be a 79.8g increase.
If the rim weight matches the catalog value of 380g, it comes to 608.5g.
Hmm. That's a tough call.
I could build it a bit lighter using DT Revolution,
but with this spoke, once you reach a certain spoke tension level,
it feels like the rim isn't being pulled but rather the spoke stretch is being converted.
The DT Revolution 2.0-1.5-2.0 coefficient is
around 64.2, 64.4, 64.5%, so I calculate at 64.4%.
With a difference this small, CX-RAY lets me build a much stiffer wheel,
so I basically don't use Revolution.
If I build it with the AL22 rim and it comes to 599g, getting into the 500g range
would be a nice round number that would make people think "wow, light!!"
But it looks a bit difficult. I could use a lighter hub,
but there's the matter of pricing, so it's tricky.
The number 599—it only looks special because we're looking at it in decimal.
In binary it's 1001010111, and in hexadecimal it's 257.
So much for that excuse (laughs).
Whether the AL22 rim becomes Nomu Lab Wheel No. 5 is still undecided (No. 4 is confirmed).
I'll source the rim once and build it.
↑But first I need to build the pre-orders for No. 1.
There's still an opportunity to source hubs before the end of the year, so I'm hoping to make it happen.