Tire sizing question... hmmm...
09-14-2007, 03:21 AM
#21
I can't say whether or not it will bug out VDC, but isn't the recommended wheel for 295/35 like 10-11.5? If not, I would do 255/40 in the front, so the tire isn't so damn short (255/35 will be pretty small). If you end up having to get the 275/35, just make sure you go with 245/40 or 255/35 fronts, so they aren't taller than the rears. Oh and the series of the tire is a ratio sidewall height to width, not the actual height of the sidewall (if you notice the height of most 40 series sidewalls is not 4 cm)
09-14-2007, 06:31 AM
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Originally Posted by dkmesa350z
I can't say whether or not it will bug out VDC, but isn't the recommended wheel for 295/35 like 10-11.5? If not, I would do 255/40 in the front, so the tire isn't so damn short (255/35 will be pretty small). If you end up having to get the 275/35, just make sure you go with 245/40 or 255/35 fronts, so they aren't taller than the rears. Oh and the series of the tire is a ratio sidewall height to width, not the actual height of the sidewall (if you notice the height of most 40 series sidewalls is not 4 cm)
As I said above, the 275's are on nationwide backorder from BF Goodrich. There's no shipping date on them and not even a promise that they'll continue making them in the future. For that reason, I'm going with the 295 rears. There is no such thing as a 285/35/18 drag radial.
I'm mainly concerned about the overall diameter of the tire. Width wise, I've got about the same difference in width on my street tires that I'm currently running with no issues.
My concern now about diameter is that the 265/35/18's are ony .3in taller than the 255/35/18's. This will still be a big difference with the rears. The 255/40/18's are 26in in diameter and the 295/35/18's are 26.2in in diameter. This seems to be the most well sized set to me.
09-14-2007, 06:35 AM
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Originally Posted by StreetOC192
taurran, I know you wouldn't want a smaller rear, but wouldn't the sizing be better if you went with a 285/35 or even 275/35 in the rear and left the front as-is (255/35)? I wouldn't think you would want to increase your sidewall on the fronts.
09-14-2007, 11:44 AM
#24
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Lets break it down really easy and simple , the stock tire are a 225/45 and 245/45 . If you nitice the aspect ratio is the same and a 20mm difference between the two. When you get you new tires keep the same aspect ratio and have a 20mm difference between them. ITS JUST THAT EASY , and everything with be the proper.
09-14-2007, 08:03 PM
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Originally Posted by terrasmak
Lets break it down really easy and simple , the stock tire are a 225/45 and 245/45 . If you nitice the aspect ratio is the same and a 20mm difference between the two. When you get you new tires keep the same aspect ratio and have a 20mm difference between them. ITS JUST THAT EASY , and everything with be the proper.
09-14-2007, 11:32 PM
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Originally Posted by taurran
Having a 20mm difference at wider tire levels wouldn't be the same ratio.
09-17-2007, 03:22 PM
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Originally Posted by redlude97
doubling that distance without doubling the width of the tires isn't the same ratio either
09-17-2007, 03:51 PM
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Originally Posted by taurran
Not sure what that means exactly, but per the 225/245 ratio, it would require a 270.9 wide tire for a 295 rear. I guess the closest it would be would be a 265/35. The only concern I have is that there is still a .9in difference in diameter between the two.
09-17-2007, 07:41 PM
#30
Originally Posted by taurran
Ok, well, I've come to the conclusion that I absolutely suck at buying the properly sized tires. I just recieved a set of four tires, two front BFG KDW2 and two rear BFG Drag Radials for my 18" wheels. Here are the specs:
Front: 18x9.5, 255/35/18 KDW2
Rear: 18x9.5, 295/35/18 DR
The big issue is the overall diameter of tires. I was going to get the 275 DR's for the back, and change my mind at the last minute because the size was on backorder for months. The 295's are almost an inch larger in diameter.
So, the 255/35 fronts only have a diameter of 25", and the rears have a diameter of 26.2". If I were to order the 40mm sidewall in front, they would have a 26" diameter.
My question is - am I ok with that large of a difference in diamter of tires between the front/rear, or should I go ahead and send these back and get the 40 series tires up front?
Thanks in advance.
Front: 18x9.5, 255/35/18 KDW2
Rear: 18x9.5, 295/35/18 DR
The big issue is the overall diameter of tires. I was going to get the 275 DR's for the back, and change my mind at the last minute because the size was on backorder for months. The 295's are almost an inch larger in diameter.
So, the 255/35 fronts only have a diameter of 25", and the rears have a diameter of 26.2". If I were to order the 40mm sidewall in front, they would have a 26" diameter.
My question is - am I ok with that large of a difference in diamter of tires between the front/rear, or should I go ahead and send these back and get the 40 series tires up front?
Thanks in advance.
When my 305's wear out I'm going to run 295/30/19's with my 245/35/19 fronts. Should make my car corner better since there will be less diff in diameters.
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