B
Baird Webel
Guest
I've been considering building a new wheelset for our tandem. We are fairly light and I've very good
luck with respacing single bike Deore XT hubs out to 145. I don't have a disk brake setup but was
thinking of using a disk hub for the rear just to have the option in the future.
In looking at the specs on the shimano hubs, I was kind surprised at the difference between the
non-disk, FH-750 and the disk model, FH-756. The 750 has a center to right flange distance of
23.2mm, center to left is 36.8. On the 756, the center to right is 18.5, the center to left is
32.15. The difference on the left side is no surprise, you need the space for the disk, but what I
don't understand is the difference on the right hand side. I can't think of any reason why you would
change the right side of the hub because you added a disk brake on the left. The flange on the disk
hub is high, vs. low for the non-disk, but I don't know why this would make a difference on the
flange spacing either. Anybody have an explanation? Taking that 5mm just adds more dish and weakens
the wheel.
Any speculation on how much strength difference the 60mm vs 40mm flange spacing would make? I'm
assuming that the 40mm still builds a pretty strong wheel given its use on single MTBs. This
wheelset would be 700c, which is weaker, but also has much less dish. It would be a backup wheelset,
so it would get relatively little use.
Any thoughts welcome.
Baird
luck with respacing single bike Deore XT hubs out to 145. I don't have a disk brake setup but was
thinking of using a disk hub for the rear just to have the option in the future.
In looking at the specs on the shimano hubs, I was kind surprised at the difference between the
non-disk, FH-750 and the disk model, FH-756. The 750 has a center to right flange distance of
23.2mm, center to left is 36.8. On the 756, the center to right is 18.5, the center to left is
32.15. The difference on the left side is no surprise, you need the space for the disk, but what I
don't understand is the difference on the right hand side. I can't think of any reason why you would
change the right side of the hub because you added a disk brake on the left. The flange on the disk
hub is high, vs. low for the non-disk, but I don't know why this would make a difference on the
flange spacing either. Anybody have an explanation? Taking that 5mm just adds more dish and weakens
the wheel.
Any speculation on how much strength difference the 60mm vs 40mm flange spacing would make? I'm
assuming that the 40mm still builds a pretty strong wheel given its use on single MTBs. This
wheelset would be 700c, which is weaker, but also has much less dish. It would be a backup wheelset,
so it would get relatively little use.
Any thoughts welcome.
Baird