Rooski said:
The info I use shows that both the 3C40 and 3C41 have a hub flange diameter of 59 mm. The 40 should have the same left and right offset (center to flange) at 27.5 mm, and the 41 should be 27.5 left, and 25.5 right.
Not all 26" rims have the same ERD's (Effective Rim Diameter). Some are flat, and some are drop center, so you need to measure your specific rim. Depending on the specific rim, and using a 3 cross pattern, your spokes can be somewhere between 255 and 265 mm (+/-).
What length are you trying to use, and are you doing 3 cross?
I measured the ERD to be 545mm.
I am doing a 3 cross I used the numbers for the hub from the below.
O.L.D. Flange Diameter Center to Flange Left Center to Flange Right
SG-S501 135 mm 92.6 mm 31.8 mm 25.5mm
SG-S500 135 mm 92.6 mm 31.8 mm 25.5mm
SG-8R36 132 mm 92.6 mm 30.25 mm 24.85mm
SG-8C31 132.3 mm 92.6 mm 30.1 mm 25 mm
SG-8R27 132 mm 92.6 mm 30.25 mm 24.85mm
SG-8R25 132 mm 92.6 mm 30.25 mm 24.85mm
SG-8R20 132 mm 92.6 mm 30.25 mm 24.85mm
SG-8C20 132.3 mm 92.6 mm 30.1 mm 25 mm
SG-4R41 130 mm 83.5 mm 29.6 mm 21.7 mm
SG-4R35 130 mm 83.5 mm 29.6 mm 21.7 mm
SG-7R46 130 mm 84.4 mm 29.55 mm 21.85 mm
SG-7C26 127 mm 87 mm 28.3 mm 23.1mm
SG-7C16 127 mm 83.5 mm 31.45 mm 22.25 mm
SG-3R40 120 mm 70 mm 26.4 mm 24.8 mm
SG-3R40 127 mm 70 mm 26.4 mm 24.8 mm
SG-3C41 120 mm 59 mm 28.8 mm 26.4 mm
SG-3C41 127 mm 59 mm 28.8 mm 26.4 mm
