Another wheel day (and so on).
Built the rear wheel for Nomu Lab Wheel #33.
HB-7600
Single-threaded rear hub, 36H, laced full Campagnolo Italian style.
I'll do the bracing later.
It's the counterpart to the front wheel I built the other day, and these are being built as wheels for a university tandem racing competitor.
The regulations called for #14 plain spokes with brass nipples, 36H, tangential lacing, and tubular rim.
Apparently there's no rule against bracing them.
Since spoke and nipple brands were open, I went with DT.
From what I understood of the regulations, I was wondering if full inpoke or full outpoke with single-cross would still count as tangential, or whether the front hub could be a 100mm-width quick-release hub, and all sorts of other technicalities come to mind. But if I heard later that "we couldn't use them in the competition because they violated the regs..."—that'd be a pain. So I did lace them Italian style, but with eight-cross instead of six. If I were doing six-cross, it probably wouldn't get any complaints, but with a large-flange 36H hub, eight-cross makes more practical sense, so there's no reason not to do it that way.
It's similar to keirin regulations, but the difference there is that the specified spoke is a 15-number base star, either round-butted or aero-butted, and the lacing method is mandated as eight-cross JIS style.
For the eight-cross spoke length corresponding to Dura-Ace track hubs, Star only provides 305mm as the NJS spoke. Since the pipe rim's inner diameter is pretty consistent across manufacturers, whether it's an Ambrosio Montreal, a Mavic GL330, a Niji Countach, or a Fiamme Irida, they all come out to about the same length.
This hub is single-threaded so there's an offset, which means the spoke lengths differ left and right. But when I calculate from actual measurements, the right side comes to 304.9mm and the left to 306.2mm—both falling outside the 305mm range. Pretty much the same thing happens even with NJS wheels; with a single-threaded 7600 hub, the calculation gives you roughly 305mm on the right and 306mm on the left. But if there's a 1mm difference, shorter is better than longer, so they only stock 305mm. And honestly, if they had both 305mm and 306mm available and someone used 306mm on the right side—that would be very bad indeed.
Like the GL280, the GL330 model name contains a number that's supposedly the weight specification, but in reality both tend to be heavier than stated.
For earlier models from the "red label" era, the actual weight usually comes pretty close to the spec, but for these newer ones it's different.
For more on red labels, see here and here.
Built the rear wheel for Nomu Lab Wheel #33.
HB-7600
Single-threaded rear hub, 36H, laced full Campagnolo Italian style.
I'll do the bracing later.
It's the counterpart to the front wheel I built the other day, and these are being built as wheels for a university tandem racing competitor.
The regulations called for #14 plain spokes with brass nipples, 36H, tangential lacing, and tubular rim.
Apparently there's no rule against bracing them.
Since spoke and nipple brands were open, I went with DT.
From what I understood of the regulations, I was wondering if full inpoke or full outpoke with single-cross would still count as tangential, or whether the front hub could be a 100mm-width quick-release hub, and all sorts of other technicalities come to mind. But if I heard later that "we couldn't use them in the competition because they violated the regs..."—that'd be a pain. So I did lace them Italian style, but with eight-cross instead of six. If I were doing six-cross, it probably wouldn't get any complaints, but with a large-flange 36H hub, eight-cross makes more practical sense, so there's no reason not to do it that way.
It's similar to keirin regulations, but the difference there is that the specified spoke is a 15-number base star, either round-butted or aero-butted, and the lacing method is mandated as eight-cross JIS style.
For the eight-cross spoke length corresponding to Dura-Ace track hubs, Star only provides 305mm as the NJS spoke. Since the pipe rim's inner diameter is pretty consistent across manufacturers, whether it's an Ambrosio Montreal, a Mavic GL330, a Niji Countach, or a Fiamme Irida, they all come out to about the same length.
This hub is single-threaded so there's an offset, which means the spoke lengths differ left and right. But when I calculate from actual measurements, the right side comes to 304.9mm and the left to 306.2mm—both falling outside the 305mm range. Pretty much the same thing happens even with NJS wheels; with a single-threaded 7600 hub, the calculation gives you roughly 305mm on the right and 306mm on the left. But if there's a 1mm difference, shorter is better than longer, so they only stock 305mm. And honestly, if they had both 305mm and 306mm available and someone used 306mm on the right side—that would be very bad indeed.
Like the GL280, the GL330 model name contains a number that's supposedly the weight specification, but in reality both tend to be heavier than stated.
For earlier models from the "red label" era, the actual weight usually comes pretty close to the spec, but for these newer ones it's different.
For more on red labels, see here and here.