Another wheel build today (and so on).
Built a rear wheel using a customer's Tni AL22 rim.
Wasn't asked to remove the sticker, so
I left it on as is for now.
FH-T780 32H all-competition 4-cross lacing.
Probably won't do any tied-and-soldered nipples.
The hub's flange diameter extends beyond the hub body on the left side, which is fine in itself,
but it being unusually long caught my attention, so I looked it up.
According to Shimano's documentation, the flange width (Shimano measures outer to outer) is 57.4mm,
and the dish amount is 6.6mm—the way they describe it is confusing—
As I've written before, this is calculated by taking
half the flange width and adding or subtracting the dish amount
to get each side's individual flange width.
I wish they'd just give you these numbers straight from the start,
though that's how the old documentation was done.
↑These are the numbers for 980-series XTR hubs:
Left is FH-M985 (135mm quick-release + disc brake mounting)
Right is FH-M988 (142mm thru-axle + disc brake mounting)
The 980 series doesn't have a rim brake (V-brake) version,
so there's no FH-M980 hub.
The left and right flange widths for this hub are listed as actual numbers:
just like the FH-T780, they're 22.1/35.3mm.
The T780-series XT is trekking-specific grouppo, and
the MTB version isn't the M780 but the later numbered
M8000 series.
The FH-M8000, the rear hub of M8000 series with 135mm quick-release (with disc brake mounting),
also has left and right flange widths of 22.1/35.3mm.
T780-series XT is the top-tier and current trekking grouppo,
but below it, the T610-series Deore's FH-T610
has a flange width of 59.2mm and dish amount of 7.8mm.
In left and right widths, that's 21.8/37.4mm.
Even lower-tier T4000 and T3000 models also have 59.2mm flange width—
meaning among rim brake hubs, XT alone
matches the dimensions of disc brake hubs.
This rear wheel has neither an offset rim nor
asymmetric lacing like Champion/Competition pattern,
yet I've noticed surprisingly low spoke tension difference left to right.
Spoke tension differences can be managed somewhat through lacing technique,
but flange width is something I can't adjust, so wider is better.
Incidentally, for the 950-series XTR and contemporary 750-series XT and M570-series LX,
the rear hub dimensions (only 135mm quick-release available)
are 60mm (23.2/36.8mm).
These are 9-speed era components, so they weren't designed for
10-speed or MTB 11-speed sprocket mounting,
but 60mm width is quite a wide flange.
Modern road 11-speed hubs (130mm width)
do have around 57mm flange width, but the right flange is barely 20mm,
and most distribute that 57mm as roughly 19.5/37.5mm,
so 57.4mm with 22.1/35.3mm is
far more sensible in terms of dish than road hubs.
Built a rear wheel using a customer's Tni AL22 rim.
Wasn't asked to remove the sticker, so
I left it on as is for now.
FH-T780 32H all-competition 4-cross lacing.
Probably won't do any tied-and-soldered nipples.
The hub's flange diameter extends beyond the hub body on the left side, which is fine in itself,
but it being unusually long caught my attention, so I looked it up.
According to Shimano's documentation, the flange width (Shimano measures outer to outer) is 57.4mm,
and the dish amount is 6.6mm—the way they describe it is confusing—
As I've written before, this is calculated by taking
half the flange width and adding or subtracting the dish amount
to get each side's individual flange width.
I wish they'd just give you these numbers straight from the start,
though that's how the old documentation was done.
↑These are the numbers for 980-series XTR hubs:
Left is FH-M985 (135mm quick-release + disc brake mounting)
Right is FH-M988 (142mm thru-axle + disc brake mounting)
The 980 series doesn't have a rim brake (V-brake) version,
so there's no FH-M980 hub.
The left and right flange widths for this hub are listed as actual numbers:
just like the FH-T780, they're 22.1/35.3mm.
The T780-series XT is trekking-specific grouppo, and
the MTB version isn't the M780 but the later numbered
M8000 series.
The FH-M8000, the rear hub of M8000 series with 135mm quick-release (with disc brake mounting),
also has left and right flange widths of 22.1/35.3mm.
T780-series XT is the top-tier and current trekking grouppo,
but below it, the T610-series Deore's FH-T610
has a flange width of 59.2mm and dish amount of 7.8mm.
In left and right widths, that's 21.8/37.4mm.
Even lower-tier T4000 and T3000 models also have 59.2mm flange width—
meaning among rim brake hubs, XT alone
matches the dimensions of disc brake hubs.
This rear wheel has neither an offset rim nor
asymmetric lacing like Champion/Competition pattern,
yet I've noticed surprisingly low spoke tension difference left to right.
Spoke tension differences can be managed somewhat through lacing technique,
but flange width is something I can't adjust, so wider is better.
Incidentally, for the 950-series XTR and contemporary 750-series XT and M570-series LX,
the rear hub dimensions (only 135mm quick-release available)
are 60mm (23.2/36.8mm).
These are 9-speed era components, so they weren't designed for
10-speed or MTB 11-speed sprocket mounting,
but 60mm width is quite a wide flange.
Modern road 11-speed hubs (130mm width)
do have around 57mm flange width, but the right flange is barely 20mm,
and most distribute that 57mm as roughly 19.5/37.5mm,
so 57.4mm with 22.1/35.3mm is
far more sensible in terms of dish than road hubs.