Originally Posted by
Winfried
Hello,
My front wheel is pizza-shaped now after someone hit it on purpose while the bike was parked :-/
For the fun of it, I'd like to rebuild the wheel by re-using its hub and possibly the spokes instead of ordering a ready-to-use wheel.
Before ordering a rim, in addition to its ERD, I need to find how long the spokes should be… which requires
inputing the left + right flange offsets.
Shimano doesn't provide those infos, and
this page just says "Flange to center: 60,2 mm". FWIW,
this page has infos for a similar hub.
Is there a reliable way to compute the left/right flange offsets from an actual hub?
Thank you.
If you can get the info of the flange width and the offset distance, it can be calculated. See the diagram, 60.6mm flange with 5.5mm offset in this example.
1. Divide the flange width in 2 to determine the centerline between the flanges. (Blue)
2. Add or subtract the offset amount from the flange centerline for each side to get the centerline between the locknuts. (Pink)
3. If you have Shimano measurements, the flange measurements are outside to outside. If you want to, adjust each side by 1/2 the flange width, (3mm flange width in the example). (Green)
If you can't get the specs, you can measure and calculate. There should be instructions available online. Use directions for rear and adapt to a disc hub.