Ford Mustang Forum - View Single Post - 2012 Tire diameters, gearing & tuning. Stock ECU conflicts?
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post #7 of (permalink) Old 09-13-2013
6Bolt
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Quote:
Originally Posted by hawkeye18 View Post
It can absolutely be corrected with a tune, but check out this little conversation I had with Bama Tunes regarding changing tire sizes on a '12 (and, I have to assume, any 11+)



I was going from stock Brembo tires to 255/45/18 Nitto NT555s. My speedo is dead-on now, btw.
Weird my 255/45/18s are said to only be 746 revs per mile

http://www.discounttire.com/dtcs/infoTireMath.dos

Oxford White 2015 Premium GT with 50-Year Pkg | 3.55 Gears | Roush CAI (105mm Velocity tube) | Stainless Works Headers (Jet-Hot ceramic coated), high flow cats, H-Pipe CatBack full 3" with 4" tips| BAMA V2 93 Octane Tune | Baer EradiSpeed-Plus 2-Piece Rotors | JLT 3.0 Oil Separators | FRPP M-20201-M STB | Silver PP Wheels 19x9, 19x9.5 | NITTO G2 255-40-19, 275-40-19 Tires | J&M Jacking Rails & Subframe Alignment Kit | Steeda Subframe Connectors & Bushing Supports | BMR Front Subframe Brace | Cervinis 1232 Functional Ram Air hood | Ford Performance door sills | White Madness Garage Chrome Shifter | Diode Dynamics interior LED conversion stage 1 & XP80 reverse light | 3M Dark Ceramic Tint (25% sides/20% rear) | Lloyds "50 Years" floor and trunk mats...

Performance White 2012 Premium Pony Package | Torsen T2R 4:1 TBR | FRPP 3.73 Gears | GT500 Differential Cover | DSS 3.8" Carbon Fiber DS | Airaid CAI | BAMA 93R tune | Baer DecelaRotors (drilled/slotted) | BMR Adjustable Panhard & Brace | JLT Oil Separator | Boss 302 STB | Nexen N3000 255-45-ZR18Y tires | PP Engine Cover | 25% Tint

All cars should be rated for Smiles Per Gallon!
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