[steve37887]

I don't want to run spacers road racing. Can you tell me about the 18's you are running? Brand, width, backspace, etc?

I've got Forgestar F14s in 18x11 with +15 offset and I believe I'm running a 10mm spacer, but I'd have to double check that for you to be sure.

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[steve37887]

May depend on the wheel also. I'm running 275s/295s on Scat pack replica wheels that clear the knuckle. That all said, I am so frustrated with fighting brake issues, I went to Cleveland Power and Performance and ordered a 4 piston Brembo upgrade off a Charger SRT, which includes knuckles. Only question now is if 18's will clear those 4 piston Brembos. I think they will. I was pretty sure they would not clear the 6 piston Brembos, so even though those are what I wanted, I did not order them. When I get it all together, I'll share. View attachment 987724

They should clear the Brembos, but like you said it depends on the wheel. You may need to run a spacer. I was running 18s when I had my Brembos. I've since upgraded to 6 piston Wilwoods and still can run 18s.

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[steve37887]

2015 Challenger R/T Plus

Ok, I don't think they'll fit with your knuckle but I run 18x11" wheels and 315 tires. But Scat Pack knuckles are different.

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[steve37887]

I ran factory 245s all around at my first event. I bought some Scat Pack replica 10.5 wheels and put 295s on them, but they rubbed the knuckle in the front. So then I have been running staggered past 2 months, 9" front wheels with 275s and the 295s on the rear. Kumho's. This is not a bad set up because it forces understeer. The Kumho Ecstas are not bad, price wise not bad. I've got 10 runs on them so far. However, I am participating in NASA and I eventually want to run American Iron. That limits you to 18" wheels. I've not found any decent width of 18" tires, that is anywhere close to the stock height. In a way that is good because it helps me with gearing, but I'd really like to get closer to what I have running the 245s or 275s on 20's. And I'd prefer to run square.

What year and model car do you have?

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[steve37887]

Best 200 tw tires and size are 315 or 335 in 18".

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