Biggest disc size under 17" wheel

[gavs20v]

Thanks Greg , good to know
Gav

[Greg_S]

I have AP 4 pots with 330mm discs and clearance is quite right so you will likely need to machine it down a bit

[gavs20v]

Thanks . They are 6 pot ap racing calipers. Currently have a 360mm rotor so will look to get this machined down
Thanks
Gav

[_ShurikeN]

It depends on wheel and caliper design. 330mm possible rather freely. 345 with 4-pots are expected to be possible under many worthy wheels. There is a real chance to accomodate 350-360 under some wheels but only with floating caliper, no brembo style: there are witnesses of A8 D2 W12 360mm brakes under some 17".

... caliper design matters indeed. Mercedes-Benz W220 has got 330mm 4-piston brakes under OEM 16" rims.

[quattro-nick]

i have 330mm disc with 8-piston calipers from k-sport under my 17' azev wheels with et35

[LHD_Kid]

Appreciate this will also be dependant on the design of the wheel however what's the rule of thumb regarding the biggest disc you can fit under a 17" wheel ?

Thanks
Gav

Also depends on caliper too... I had 345mm discs inside 17"cup reps... don't think would have fitted with Porsche calipers though...

[gavs20v]

Appreciate this will also be dependant on the design of the wheel however what's the rule of thumb regarding the biggest disc you can fit under a 17" wheel ?

Thanks
Gav