Weapon F

This goes out to all you tire and rim gurus I'm thinking of going with a 275 in the front and either a 295 or a 305 in the rear. I've included several different calculations with different tire combo to take a look at. Feed back would be greatly appreciated.
Side note how do get these images to load larger?
1. 275/30/19F with 295/30/19R
2. 275/35/19F with 295/30/19R
3. 275/30/19F with 305/30/19R
4. 295/30/19R vs 305/30/19R

Gymkata

I think 275/30R19 front and 295/30R19 rear would be great. I've considered that combo many times...I just haven't purchased custom wheels with the necessary offset to clear 295mm tires in the rear.

I've only seen 305mm on an ISF a few times. The first time the guy was running 305/30R19 Michelin PSS on 19x11 +61 (If my memory serves). His rear fenders were definitely rolled flat and possibly shaved.

275/35R19 in the front would likely be a little too tall and would probably rub during bumps while turning unless you are at stock height...and even then ??? You'd have to try a test fitment to see if you could clear wider than 275mm tires in front. If you found a way to make it work, 295mm squared would be sick.

If I were going to run that setup I personally would go 275/30R19 on 19x9.5 +45 front and 295/30R19 on 19x10.5 +60 rear. 19x9 and 19x10 will work fine for those tire widths, but 19x9.5 and 19x10.5 would be even better.

Weapon F

Thanks for the feedback Gymkata I was leaning towards 275/30/19F 295/30/19R setup as well, I like the specs on them.

flowrider

iTrader: (9)

IMHO, you may have problems running 275/30s in front. There my be interference with the fender lining. You haven't specified the wheel width or offset. I am running RCF wheels. 9s and 10s. 255/35 in front and 295/30 in back. My rears fenders are rolled flat. I have minor rubbing over large bumps or when two people are in the back seat. The wheel lip in front comes within a hair of the A arm. my offsets are +50mm in front and +41mm in back. IMHO, handling is perfect with this combo.

Lou

Weapon F

Hey Lou,
For yhe front I have a choice of either 9 or 9.5 most likely I'll be going with the 9.5 for the front and in the rear 10". I definitely hear you on hitting the front fender liner. I'm doing measurements right now seeing what I can get away with haven't decided on the offset yet.

MileHIFcar

Lou,

Do you think you can get away without rolling the rear fenders if you had a higher offset like a +45 to a +50 for a 10" wheel on a 295/30?

flowrider

iTrader: (9)

^^^^Maybe. A higher offset would bring the tire edge in, and there is room to handle that on the inside of the fender well. If we look at the stock 9" wheel the offset is 55mm vs 41mm for the RCF wheel. That's a difference of 14mm or ½". And if we look at the added wheel width, the difference is 1". So the wheel edges are moving out ½" on both sides due to offset, and ½" in and out due to width. That means the outer rim of the RCF wheel is now 1" further out and the inner edge of the wheel is in the same place as the stock wheel. Does my math make sense

Lou

Gymkata

My track setup is 275/35R18 Bridgestone Potenza RE-71R tires on all corners mounted on 18x9.5 +45 Enkei PF01s. The fronts are fine...even with the RE71Rs being extremely wide for a 275mm tire (much wider than my 275/30R19 Michelin PSS). My car is on coilovers and is a little low for my liking and I don't have issues rubbing in the front...no fender modifications in front.

Gymkata

You are unlikely to get away without rubbing on an unmodified rear fender with 295mm rear tires without an offset of at least +55.

MileHIFcar

Makes sense on both responses....... I'm just thinking ahead to the future if I switch out to different wheels which are currently front 8.5" +35 245/35/19 & rears 9.5" +45 275/30/19 lowered on swifts with zero rub!

I don't think I can do a 255/35/19 & 295/30/19 on 8.5 & 9.5" wheels with those offsets.... so I was thinking that my next set of wheels I would jump to a 9 & 10" widths and probably a +55 offset in the rear to accommodate the larger sizes that I eventually want to run

flowrider

iTrader: (9)

^^^^I didn't see where you were lowered. With that being said, it's a new ball game. Tolerances are much tighter and IMHO, you will have issues both front and rear. 295/30/19 is not recommended for a 9½" wheel. 255/35/19 will work on a 8½" wheel.

Lou