Disc offset one for the experts

The standard disc has about 15mm offset, do you think this amount of offset is to great for a floating disc?

Not too much if you have the right profile disc carrier or a proper spacer setup.

there are umpteen variations on full floaters out there.

Yep, just gotta make sure caliper clears the spokes.

My intention is to either use this disc with a 9mm spacer or same disc but with the correct larger offset eliminating the need for spacer ,if the large offset is not considered to big.

That looks pretty racy, using a spacer should be okay to get it nice and close to the fork legs t clear the wheel hardware.
Cheers Richard

yes , I've already set this disc up with a spacer but I'm hoping I can do away with the spacer and use a disc with a 9mm bigger offset. becoz the 2 piece discs are not as solid as the big chunk of cast iron , a very big offset may not be a good idea. there is a 1kg difference in weight with this 320mm item

Ms Peel's floating wave rotor is 220 mm OD and clears slider by ~3/8" which places factory caliper to clear spokes by ~1/4". 320mm rotor will place caliper closer to rim so even further away from the mildly sloped brake side spokes. Peel's rotor's 6 hole pattern is ~1/16" wider than the hub itself, ie: its bolts would just foul hub OD until hitting the spoke flange, so my adapter is a squat top hat ~1/2" total thickness, with ~1/4" thick flange that has 6 threaded holes for rotor bolts with slightly relieved 'slots' in hub rim to clear bolts. Center thick section fits inside rotor opening with 5 holes to fasten to hub. Both this adapter-spacer and the welded on caliper hanger are out of 7075 T6. Once I got rotor mounted on hub with adapter I then placed caliper over rotor with the master cylinder functional to clamp them together in true relation while welding the slider holder on, so no measure errors could creep in.

My Brembo set up is a floater and works great.

my question was with regard to the acceptable amount of offset with a floating disc,
3/8" is about all you will get by moving the hub to the right .
I'll try and do some research and find if there are any bikes that use this much offset.
its not a problem to use the disc pictured with a small offset and use a spacer but if I can get away
without using the spacer then all the better.
as was suggested moving the hub to the right may be a good idea but not for my plan to supply a bolt on brake upgrade
although if I was to supply rim and spokes and appropriate spacer then there would be no problem, as I am currently having made alloy flanged Norton front disc rims and drum rims, and stainless spokes as well