Since DFAS-CLEVELAND finally got thier rectal-cranial inversion fixed and I got _some_ of my long overdue pay, I just ordered up my Alex TD17 hoops to lace onto my Surly New Disc Hubs.
According to Surly the New Disc Hubs are:
FRONT DISC (100mm spacing)
flange diameter (L or R): 58mm
C-T-F (left/disc side): 22.5mm
C-T-F (right/drive side): 32mm
REAR DISC (135mm spacing)
flange diameter: 58mm
C-T-F (left/disc side): 34mm
C-T-F (right/drive side): 38.5mm
ERD of the Alex TD17 is reported to be 542
Now, I crunched the numbers two or three times on several different on-line spoke lenght calculators and they "just don't feel right" to me. The lenght just seems off for some reason. They all come in at between 260.55mm (shortest front non-drive) to 262.9mm (longests rear drive side).
Giving that I usually knock a few mm off because I have a habit of bottoming out the threads in the nipples that would leave me at about 258mm spokes.... this just seems wrong to me. Perhaps it's from building too many "standard" wheels and here we are lacing a MTB hub into a road rim????
Anybody 3X'ed a Surly New Disc Hub into an Alex TD19????
Did you come up with similar numbers?
Any propellor heads or more experinced wheel builders feel like double-checking my math for me?
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