I was thinking 305/35 for 18x9 rims trying not to effect speedometer reading currently running 245/50 16 and speed checked perfect reading according to radar. any help greatly appriciated. Thanks.

 

Come on guys really need some help have to buy this week. any help appriciated.

 

305mm tires are not going to like 9" wide wheels. The max I would go is a 285 on a 9". I am in the process of buying 18X9.5 wheels with P275/35ZR18 tires. 305's are happier on 10"-12" wheels...

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1989 Formula 350, 10.5:1 383", TFS heads, Comp Cams blower grind, TPIS Mini-Ram, BBK 58mm throttle body, Vortech S-trim 15 psi, DFI, 42# injectors, S/X fuel system, MSD ignition, SLP 1.75" headers, Flowmaster exhaust, MW Racehouse 700R4, Currie 9" w/3.50 gears, Jeg's sfc's, Jeg's lca's, S&W 8-point rollbar, lookin' stock street racer...

Best ET: 10.796 @ 125.8 on 16" Sportsmans...

 

Try 265/35s or 275/35s. I'm running 18 by 10s all around with 275/35s up front and 285/35s in the back. The rears rub a little when I hit bad dips and bumps in the road, but that's mainly due 2 the fact that I dropped the car nearly 2". I saw a Saleen mustang yesterday with the chrome 18s. He had 255/35s in front and 265/35s out back. It looked real nice but I don't know if u want 2 go that low with the 255/35s.