Yet another tire SIZE question

[CanadaCraig]

Hi Guys!!

I hope you're OK.

I'm still a little bit confused. First off - I will most likely be buying Toyo Proxes 4 tires to replace the F1 Supercar tires. That said.... I want to be able to rotate - so all four tires have to be the same size. [Obviously] I'm torn between getting 245's, 255's or 275's. Most of you seem to say that 275's fit fine - they look great and there is NO RUBBING problems. Would that also true for 255's all around?! I ask - because the 255's are 'taller' than either the 245's OR 275's. It should be noted that the 245's on the car now DO rub a little when I'm backing up with the wheels turned all the way to the 'right'.

Also.....

Are there any negatives to having 275's? Would they be noisier than either of the two narrower sizes? Would they be less effective in light snow? Would tires that wide put an extra burden on any of the cars parts - suspension, steering, steering pump, etc.

Also.....

According to the Toyo Proxes 4 pamplet I have - the 255's and the 275's are 'reinforced'. The 245's are not. What does that mean?!

Thanks,
Craig!!

[89grand]

If you rub with 245's, you'll rub worse with 275's.

I think the 255 is a good choice, since it's slightly taller, it does help fill the wheel well a little better.

I don't think the 275's will cause more noise or anything like that, just rubbing more if you already rub with 245's. I seriously doubt they'd cause any sort of wear on other parts. They are 30mm wider, but that's not extreme, it's only about 1.18".

I think they mean the side wall is stiffer on the 255 and 275, probably because that size is used on some SUV's and not typically a car size except for us with LX cars.

I'd go with either the 255, or the 275 if you can address the rubbing issue.

What do you have by the way, an SRT8 or no.

[RedHot R/T]

What wheels are you running? If different from stock, what size and offset? The 245/45 and 275/40 are essentially the same size diameter. The 255/45 is 0.3" taller. Is your rubbing from width or height?

[wolfmann21]

wider wheels up front are sometimes a little harder on the tie-rods....or so a little birdie tells me lol

also, narrower tires are more effective in snow, just so ya know.reason being, cuz the narrow tires can slice thru the snow better as opposed to wider tires that struggle more to get good grip (cuz theres more snow under the tire)

which is why your summer tires are prob 245/45-20 and the snow tire size to go to is 225/60-18

tho u did say "light snow"

just food for thought lol.........

[CanadaCraig]

Hi Guys!!

I appreciate you taking the time to respond.

I own a 2006 Chrysler 300C SRT8. It has the stock wheels and the original staggered Goodyear F1's. The fronts are wearing on the outside edge so obviously it needs an alignment. I really don't like the Goodyears. They take WAY too long to warm up [8 months of the year] and as a result - driving my car [with those tires] really isn't much fun. At first I was blaming the car until I realized it was the tires. Hopefully the Proxes will be much better when it comes to that.

I'm not sure if it's the width or height of the 245's that cause the rubbing - but it only happens when I'm backing up and the wheels are turned as far as they can go. If I ease up on the steering wheel a bit [A bit more than usual] the rubbing stops.

As for putting 255's all around - I have to constantly remind myself that there really isn't a huge difference in size. [From the 245's] I mean 0.3" taller really isn't that much. [Or is it?!]

As for winter driving - well - I don't plan on driving it in the snow - but if I'm out someplace and it starts to snow - I'd like to know that I have at least a chance of making it home safe. I am hoping that with the Proxes - I'd have that chance. The F1's would obviously be hopeless.

So now I'm even more in favour of going 255's all around.

Thanks,
Craig!!

[yubyub]

I just put on the Vredestein Ultrac Sessantas in 275/40, all the way around. I've had no rubbing issues at all (and I back into my parking spot at home, and swing the steering from hard left to hard right to do so).

Many others report the same thing - no issues with the 275/40s.

[yubyub]

As for putting 255's all around - I have to constantly remind myself that there really isn't a huge difference in size. [From the 245's] I mean 0.3" taller really isn't that much. [Or is it?!]

On a 245/45, the tire height is 4.34", net diameter would be 20" + 8.68", for a circumference of 90.1".
On a 255/45, the tire height is 4.52", net diameter would be 20" + 9.04", for a circumference of 91.2".

So, a change of 1.1" in circumference is about %1.2 change. So, for every 101.2 miles you actually drive, your odometer will click only 100 miles, since your tire is bigger and turns at a slightly slower rate.

[spinnercj8]

I put a set of 255/50's on mine and it did rub in the front, but I am running aftermarket wheels with a little different offset so I put a set of 3mm spacers on and it works great!!

[jg]

If you have an SRT8, the factory wheels/tires should not rub at all! Something is wrong if they are.

I had the the 275/40-20 Proxes4 on my Magnum for a while. They are awesome 3 season tires- they definitley ride and handle better than the F1's and the RSA's (i've run all on the same car). You should not have any rubbing on your SRT8 with the factory wheels.

[89grand]

On a 245/45, the tire height is 4.34", net diameter would be 20" + 8.68", for a circumference of 90.1".
On a 255/45, the tire height is 4.52", net diameter would be 20" + 9.04", for a circumference of 91.2".

So, a change of 1.1" in circumference is about %1.2 change. So, for every 101.2 miles you actually drive, your odometer will click only 100 miles, since your tire is bigger and turns at a slightly slower rate.

He already has 255's in the back, so going to 255's instead of 245's in the front would make no difference in the speedometer.

[Bagged Mag]

you never said what the height of the sidewall is. if you only rub when the wheel is pegged, than your tires could be too tall, instead of too wide.

just a thought.