Another wheel day (and so on).
Continuing from yesterday. I built a rear wheel with Pasenti's Buré rim.
A Record large flange fixed gear hub with the world mark
32 hole, all Campagnolo laced in the Italian three-cross pattern.
I probably won't be doing any tie-and-tape.
Since it's a single-threaded cup hub, I didn't do JIS lacing.
Since it's a single-threaded cup rear hub, there's an offset (ochoko).
In current Shimano catalogs, for hubs with an offset, instead of listing the flange width dimensions for left and right sides separately, they provide the total flange width and an "offset" value. Say hypothetically a total width of 57mm with the hub center at 19mm to the right and 38mm to the left (common dimensions on modern hubs), this would be listed as "57mm flange width, 10.5mm offset." The calculation from these figures is: half of 57 is 28.5, then add or subtract the offset: 28.5 + 10.5 = 38mm (left flange width), 28.5 - 10.5 = 19mm (right flange width). I'd like to tell them to just list the answers directly, but since they're quantifying the offset amount, it can be useful as a reference when doing things like different-diameter, different-spoke-count lacing on left and right sides.
Looking at the current offset amounts on Shimano hubs: the 105 FH-R7000, the top-tier rim brake hub, has 9.15mm. The Dura-Ace Track HB-7710 small flange rear hub with single-threaded cup has 2.75mm, the Dura-Ace Track HB-7600 large flange rear hub with single-threaded cup has 5.25mm, and for road disc brake front hubs, both the HB-RS770 and HB-R7070 have 6mm. As for today's Record rear hub, my actual measurement came to 6.3mm. Since the "ratio of flange width to total width" differs, the same offset value doesn't necessarily mean the same difference in left-right spoke tension develops, but as I mentioned, it serves as a reference when doing different-diameter, different-spoke-count lacing. To put it simply, this hub has an offset comparable to that of a disc brake front hub, so even though it's a fixed gear rear wheel that normally wouldn't incorporate different-diameter, different-spoke-count lacing even with a small offset, I adopted only the left-right different-spoke-count lacing.
Continuing from yesterday. I built a rear wheel with Pasenti's Buré rim.
A Record large flange fixed gear hub with the world mark
32 hole, all Campagnolo laced in the Italian three-cross pattern.
I probably won't be doing any tie-and-tape.
Since it's a single-threaded cup hub, I didn't do JIS lacing.
Since it's a single-threaded cup rear hub, there's an offset (ochoko).
In current Shimano catalogs, for hubs with an offset, instead of listing the flange width dimensions for left and right sides separately, they provide the total flange width and an "offset" value. Say hypothetically a total width of 57mm with the hub center at 19mm to the right and 38mm to the left (common dimensions on modern hubs), this would be listed as "57mm flange width, 10.5mm offset." The calculation from these figures is: half of 57 is 28.5, then add or subtract the offset: 28.5 + 10.5 = 38mm (left flange width), 28.5 - 10.5 = 19mm (right flange width). I'd like to tell them to just list the answers directly, but since they're quantifying the offset amount, it can be useful as a reference when doing things like different-diameter, different-spoke-count lacing on left and right sides.
Looking at the current offset amounts on Shimano hubs: the 105 FH-R7000, the top-tier rim brake hub, has 9.15mm. The Dura-Ace Track HB-7710 small flange rear hub with single-threaded cup has 2.75mm, the Dura-Ace Track HB-7600 large flange rear hub with single-threaded cup has 5.25mm, and for road disc brake front hubs, both the HB-RS770 and HB-R7070 have 6mm. As for today's Record rear hub, my actual measurement came to 6.3mm. Since the "ratio of flange width to total width" differs, the same offset value doesn't necessarily mean the same difference in left-right spoke tension develops, but as I mentioned, it serves as a reference when doing different-diameter, different-spoke-count lacing. To put it simply, this hub has an offset comparable to that of a disc brake front hub, so even though it's a fixed gear rear wheel that normally wouldn't incorporate different-diameter, different-spoke-count lacing even with a small offset, I adopted only the left-right different-spoke-count lacing.