Both 10" SLS and 11" TLS front brake systems use the same volume of fluid to operate them as they both have 4 pistons, all of the same diameter.
Hi Andrew,
Are you sure the 11" TLS front wheel cylinders are the same diameter as the 10"?
If they
are the same size ... why do they need a bigger master cylinder, which if everything else was equal, would give you shorter pedal travel, but require a stronger right leg.
I fitted a 109" master to an otherwise standard 88" system. It crippled my right knee.
From memory, an 88" has 1.25" front cylinders and 1" rears., and ...
a 109" has 1.25" rears and, er, I can't remember the size of the fronts ... possibly 1.175" (I'm guessing there).
One point I haven't mentione in a couple of years or so .... the location of the bleed nipples on the 109" front wheel cylinders are on the centre line of the pistons. In
theory, it is impossible to expel the air above the centre line.
I have two solutions....
Before fitting the back plate to the axle, I assemble the brakes shoes, lay the unit, shoe side down, on a milk crate, hoses connected, which means the bleed nipple as at the top, then bleed.
Thereafter, hopefully never, I wind the adjusters fully off, which reduces (eliminates?) the size of the trapped air between the pistons.
NEVER FIT A RIGHT HAND BACK PLATE TO THE LEFT HAND HUB, OR VICE VERSA. Twin
trailing shoes can be quite frightening.

OT, on more than one occasion iI have met (not done) disc brake calipers fitted to the wrong end of the axle. That puts the bleed nipple at the bottom. Nothing appears to be wrong (unless you know) but the brakes will not bleed, despite there being no bubbles.

Hands up those who ......!
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