275's on OEM 19's?
#16
11-08-2005, 06:35 PM
#21
11-08-2005, 09:40 PM
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#22
11-08-2005, 10:29 PM
Originally Posted by lowrider
Even though what you're doing is wrong. No Tire Manufacturer will stand behind it's products, if it is not used per specification. I'm surprised you even found an installer who would install this, due to the liability issues he would have.
But, you have 17" wheels, and your tire sidewalls are 2" higher than on a 19" wheel. That means, that on a 19" wheel, the tire would have to contort that much more to fit the too narrow rim. Please don't tell this guy it's OK, because it's not. Specific tires are made to fit specific rim widths. I do a lot of modifying and kludging, but I don't mess with tire specifications, my life is worth more than that.
If you want wider tires, spend the bucks and get the proper wheels. It's as simple as that. Yep, I like wide tires too. I'm running Nismo wheels, 245 up front and 275 in the back, but with 8.5" and 9.5" width wheels.
Lou
But, you have 17" wheels, and your tire sidewalls are 2" higher than on a 19" wheel. That means, that on a 19" wheel, the tire would have to contort that much more to fit the too narrow rim. Please don't tell this guy it's OK, because it's not. Specific tires are made to fit specific rim widths. I do a lot of modifying and kludging, but I don't mess with tire specifications, my life is worth more than that.
If you want wider tires, spend the bucks and get the proper wheels. It's as simple as that. Yep, I like wide tires too. I'm running Nismo wheels, 245 up front and 275 in the back, but with 8.5" and 9.5" width wheels.
Lou
cuz i run this set up before and i had a pretty good balance of grip.
Supra Mkiv
(18x8.0, 18x9.5 tire 245,35f 285,30R)
Starlet
(13x9.5, 13x10.5 tire 225,50f 255,50R)
#23
11-09-2005, 11:20 AM
Buy some 3-piece wheels that are going to be lighter and designed to be larger from the get-go. Seems to me like widening OEM wheels is just adding unnecessary horsepower-robbing weight. I guarantee you that a 20" 3-piece wheel is going to be lighter and better suited for what you're trying to do. If a wheel is designed to be 19x8.5 doesn't it seems plausable that it should remain that size? I think the engineers know what they're doing. If you want wider, go 3-piece.
#24
11-09-2005, 11:54 AM
As others have said, the 19" wheel is not going to be very forgiving with larger than stock tire sizes due to the ultra short sidewall, there's just not alot of rubber there to work with.
baileyrx has 17s....with significantly taller sidewalls and that's how he's able to run 275s on 8" wide rims. I'm assuming he's running 275/40s.
I just don't see how a 275/30/19 would work on a 19x8.5" wheel...
I also run 275/40/17s...on my '94 Mustang Cobra, but they're on 17x9" wheels. While the 275s work on 17x8s, 17x9 is the optimal wheel size.
Sean in Norcal
'05 G35 Coupe 5A
'94 Mustang Cobra
baileyrx has 17s....with significantly taller sidewalls and that's how he's able to run 275s on 8" wide rims. I'm assuming he's running 275/40s.
I just don't see how a 275/30/19 would work on a 19x8.5" wheel...
I also run 275/40/17s...on my '94 Mustang Cobra, but they're on 17x9" wheels. While the 275s work on 17x8s, 17x9 is the optimal wheel size.
Sean in Norcal
'05 G35 Coupe 5A
'94 Mustang Cobra
Last edited by seanl; 11-09-2005 at 11:57 AM.
#25
11-09-2005, 01:38 PM
19" Plus tire Sizes
All -
Take a look at this tire size comparison calculator
http://www.1010tires.com/TireSizeCal...?action=submit
You can also change view options to show what the two tire sizes look like next to each other...this should answer your questions.
If you realize that changing rear tires from the 245/40 to 275/35 changes the actual tire dynamic by 1/2 of 1% - and you'll get a bout 1" more width of tire on the factory rims - you won't be sacrificing your life for the upgrade - lets get realistic here. You'll get more rubber on the ground - bottom line - and that is the purpose.
If you change the tire to a 295 - then the edges will begin to round out and the tire will not be as flat, negating the reason for the change. Remember your talking about gaining about a 1/2" on either side of the wheel, and at the same time, reducing the sidewall height as well.
When you look at the calculations and pictures - you'll realize quickly that the 275's are the way to go as the diameter and overall height is actually lower than stock...the width is the only real change.
I used to own a tire shop - trust me - tire mods are one of the biggest businesses out there. Tire swaps for plus size tires - up to 3 steps is so common - the argument is a waste of time. Manufacturers will not void a warranty because you installed a tire that is recommended to be on a 9" wide wheel and you put it on an 8.5" wheel. They will void it when you melt the rubber and then complain - track your car and align it so that it performs better on the track vs. wear better on the street and then complain about wear.
If you get in an accident - because of your tires, which has in history only happened to Bridgstone in large scale - under special circumstances as well - you'll have a pretty hard time proving it. You'd have to prove all ideal conditions were in place - road, speed, weather and how your were driving - a less than 1% increase in tire size wouldn't cause that to happen.
The manufacturer and dealer will look at wear to decide its warranted status. Melted and uneven wear void warranties. Bubbles and separations and road hazard are all covered. The issues where tire size can void a warranty, is when you take a tire that is TOO SMALL and force it on a wheel that is TOO LARGE. This compromises sidewall integrity and belt alignment - therefore voiding warranty.
I personally love the Bridgstones the car came with - but I have ordered my 245 and 275 upgrades in Michelin SP2's. I have never been a Bridgstone man - and a quieter ride with more traction, hence the Michelin, is what I'm after. Goodyear and Pirelli are also great choices - Michelin has the best warranty coverage and tire wear ratings though.
If you also check out TireRack.com - you can specify your car and have it recommend plus tire sizes - guess what you get - from one of the most recognized tire dealer associations? See the pic.
Attachment 26942 Attachment 26943
Take a look at this tire size comparison calculator
http://www.1010tires.com/TireSizeCal...?action=submit
You can also change view options to show what the two tire sizes look like next to each other...this should answer your questions.
If you realize that changing rear tires from the 245/40 to 275/35 changes the actual tire dynamic by 1/2 of 1% - and you'll get a bout 1" more width of tire on the factory rims - you won't be sacrificing your life for the upgrade - lets get realistic here. You'll get more rubber on the ground - bottom line - and that is the purpose.
If you change the tire to a 295 - then the edges will begin to round out and the tire will not be as flat, negating the reason for the change. Remember your talking about gaining about a 1/2" on either side of the wheel, and at the same time, reducing the sidewall height as well.
When you look at the calculations and pictures - you'll realize quickly that the 275's are the way to go as the diameter and overall height is actually lower than stock...the width is the only real change.
I used to own a tire shop - trust me - tire mods are one of the biggest businesses out there. Tire swaps for plus size tires - up to 3 steps is so common - the argument is a waste of time. Manufacturers will not void a warranty because you installed a tire that is recommended to be on a 9" wide wheel and you put it on an 8.5" wheel. They will void it when you melt the rubber and then complain - track your car and align it so that it performs better on the track vs. wear better on the street and then complain about wear.
If you get in an accident - because of your tires, which has in history only happened to Bridgstone in large scale - under special circumstances as well - you'll have a pretty hard time proving it. You'd have to prove all ideal conditions were in place - road, speed, weather and how your were driving - a less than 1% increase in tire size wouldn't cause that to happen.
The manufacturer and dealer will look at wear to decide its warranted status. Melted and uneven wear void warranties. Bubbles and separations and road hazard are all covered. The issues where tire size can void a warranty, is when you take a tire that is TOO SMALL and force it on a wheel that is TOO LARGE. This compromises sidewall integrity and belt alignment - therefore voiding warranty.
I personally love the Bridgstones the car came with - but I have ordered my 245 and 275 upgrades in Michelin SP2's. I have never been a Bridgstone man - and a quieter ride with more traction, hence the Michelin, is what I'm after. Goodyear and Pirelli are also great choices - Michelin has the best warranty coverage and tire wear ratings though.
If you also check out TireRack.com - you can specify your car and have it recommend plus tire sizes - guess what you get - from one of the most recognized tire dealer associations? See the pic.
Attachment 26942 Attachment 26943
Last edited by ISMSOLUTIONS; 05-10-2006 at 04:41 AM.
#26
11-09-2005, 01:50 PM
One more quick item -
Tire sizes are matched to wheel sizes based on having very little to no rubber extending past the wheels rim edge. This is done mostly for aesthetic reasons - not for functionality. Many like it when the tire rubs against the curb
rather than their rim 
when parking - then again parking by Braille is lack of practice IMO. 
Remember 10 - 15 years ago and older - tires almost ALWAYS extended past the rims edge by 1/4" to 1/2"..that was a style and design choice back in the day. Now we have wheels that are 5-8 inches larger and cars much lower to the ground, that require clearances for wheel wells, etc...all again, style and design choice for appealing looks.
Most of use don't want to see large sidewalls - we want fat shoes and to be able to see the whole wheel we paid hundreds/thousands for. Manufactures design cars that way now - because that's what we buy.
Tire sizes are matched to wheel sizes based on having very little to no rubber extending past the wheels rim edge. This is done mostly for aesthetic reasons - not for functionality. Many like it when the tire rubs against the curb
rather than their rim when parking - then again parking by Braille is lack of practice IMO. Remember 10 - 15 years ago and older - tires almost ALWAYS extended past the rims edge by 1/4" to 1/2"..that was a style and design choice back in the day. Now we have wheels that are 5-8 inches larger and cars much lower to the ground, that require clearances for wheel wells, etc...all again, style and design choice for appealing looks.
Most of use don't want to see large sidewalls - we want fat shoes and to be able to see the whole wheel we paid hundreds/thousands for. Manufactures design cars that way now - because that's what we buy.
#27
11-09-2005, 02:56 PM
ISMSOLUTIONS,
Good info, and a pretty good argument for 275/35/19s on our factory 19x8.s as the overall diameters and sidewall heigh are very close...
OK, somebody step up and run 275/35/19s out back and let us know how it works/looks/fits.
My car only has 1700 miles on it so it's going to be a while before I'm in the market for new shoes....
Good info, and a pretty good argument for 275/35/19s on our factory 19x8.s as the overall diameters and sidewall heigh are very close...
OK, somebody step up and run 275/35/19s out back and let us know how it works/looks/fits.
My car only has 1700 miles on it so it's going to be a while before I'm in the market for new shoes....
#28
11-09-2005, 02:59 PM
#29
11-09-2005, 03:05 PM
Originally Posted by shatooi
ISMSOLUTIONS,
Thanks for the info. I have a question though. According to Tirerack, the optional front tire sizes are 245/35/19. Could i swap the existing 245/40's rears, up front and go w/the 275/35's in the rear?
Thanks for the info. I have a question though. According to Tirerack, the optional front tire sizes are 245/35/19. Could i swap the existing 245/40's rears, up front and go w/the 275/35's in the rear?
I thought about it as well...then did the math and went..oh well...
I know of 3-4 people who have made the change...it looks great and drives fine...more traction with the stepped up tires too.
#30
11-09-2005, 03:05 PM