Droptoplt1ta

I have 315/35/17 DR tires on the rear mounted on 17x10.5 rims.

Up front right now I have 275/40/17 on a 9.5 rim.

I want to run a skinnier tire up front.

I pretty sure a 245/45/17 will look stupid on a 9.5 rim.......

how does a car look with 255/45/17 up front and 315/35/17 in the rear?

I know the aspect ratio is different.......

AR15 guy

iTrader: (1)

The 255 will be taller. Not sure how it will look but I'm sure it would physically work.

00pooterSS

iTrader: (40)

IMO its gonna look really bad, the tire will be to narrow for the wheel and suck in the side walls, then you will also lose your bead protection on your wheel, also the side wall will be taller than on the rear so it wont look proportionate, to me the 275/40-315/35 combo is perfect, but thats my opinion.

Bullet95z28

iTrader: (3)

I have 255-40-17 on front with 9.5 inch wheel. It does not suck in and looks just fine. Heres a few pictures.

FNFAST2

245 will look just right.

00pooterSS

iTrader: (40)

the 45's will be noticably narrower than yours.

the pic in my sig is 275/40's on 9.5's in the front, a 255/45 wouldn't look right to me, I think mine are just barely wide enough, my BFG's look way better than the sumitomos it that same size.

OP you'll be pissed the first time you scrape the **** out of a wheel when you could have saved it with a wide tire, ask me how I know..... thats why I mentioned you lose your bead protection. I didnt even go with a narrower tire, just a different brand of the same size.

ls2 bait

iTrader: (11)

the 45 is the height...a 255/45r17 and 255/40r17 are the same width.

fwiw i have 9" rims and this is the tire im going to next time. mainly because on the 9" it has a slight buldge and the drag radials are staright with the rim so im just trying to even it out.

00pooterSS

iTrader: (40)

Wrong, that is not how tires sizes work. The first number affects the overall size, the second number is the sidewall height and is a percentage of the first.


The 245/45's will be taller and narrower than a 245/40

ls2 bait

iTrader: (11)

you are wrong. i know how tire sizes work. i have been selling and installing them for 8 yrs. not to mention been to more training schools via michelin and bfg and bridgestone then i care to mention. the first number is the width in mm. period. the second number is the aspect ratio and is a percentage of the width. so a 45 series is taller then a 40 series but if they both are a 245 they are the same width.

00pooterSS

iTrader: (40)

the way it has always been explained to me is the first measurement is an overall but I will look it up, but if you compare a higher aspect ratio tire with the same first set of numbers the tire will appear narrower. Like if you take a 225/60r16 and stick it next to a 225/70r15 the tread width is noticably wider, I think what I was thinking of the way its measured is measurement of the side wall not the tread.

and in the shop I have always noticed a smaller aspect ratio gives a wider footprint, so even though its measured a certain way what you end up getting is still different.

edit: ok it is measured from sidewall to sidewall, sorry about that, but you know that when you take a tire that has a smaller aspect ratio they always are a bit wider, why the hell they would measure the width at the sidewalls I dont know but it does end up affecting the width of the tread. I was going off of what I have seen in the past 10 or so years of mounting and selling them also, I never had formal training on them just experience in the shop, and again, a lower aspect will give a wider tread width in reality, maybe not on paper.

cmb570

iTrader: (2)

http://www.rims-n-tires.com/info_spe...20/%20Comparer

Zac_Speed

iTrader: (4)

What if I switched from a 275/40/17 in front to a 275/35/17 to match my 315/35/17 in back, it seems the 40 would rub if I were to lower it anyway.

ls2 bait

iTrader: (11)

not on the same rim. you have to take that into account. for every .5" change in rim width the tire width changes approx .02" in section width. if you use the same brand tire, on the same rim, they are the exact same size. just the taller tire is going to "look" diff due to likely close to an inch in overall diameter.

00pooterSS

iTrader: (40)

Yeah I get what you mean. I was just more referring to tread width, where those measurements would be sidewall width. Sorry im tired and not wording things right either anyway, but ill stop jacking the thread now.

00pooterSS

iTrader: (40)

It wont match if you do that, the middle number is a percentage of the first. If the middle number were independent of the first number then that would work.

But im lowered on 275/40r17's and dont rub.

Bullet95z28

iTrader: (3)

I think when my 255 wear out ill get a 275 instead, i think it will look a little better with a slightly wider tire on the front of my car.