Wheel/tire experts come inside.
Thread Starter
Drifting
Joined: Oct 2000
Posts: 1,957
Likes: 1
From: Albuquerque NM
Wheel/tire experts come inside.
I'm selling my old set of Malletts 18x9.5 and 18x11 to a buddy of mine. He is ordering a set of 275 35 18 fronts and 285 35 18 rears. Will this work without triggering any codes? I believe I ran 275 35s in the front with 295 35s in the rear and never had issues.
Any help would be appreciated.
Any help would be appreciated.
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
It'll be close, but he might be ok.
FWIW, running the wrong size tires does not cause codes....it causes traction control engagement issues during normal driving....that (TC engagement) is a normal function, not a trouble code, and it can be avoided by simply keeping the rear tires taller than the fronts.
I usually suggest a 1/2" overall tire height difference front to rear to avoid any such issues...In this case..
A 265/35/18 and 295/35/18 combo would be suggested.
A 275/35/18 and 295/35/18 combo will work.
A 275//35/18 and 285/35/18 combo is getting borderline.
I'm not saying it will or won't work for sure, it's getting into that gray area where "some do, some don't" experience problems.
Tires aren't cheap, so I won't recommend someone go out and buy that combo....but if your friend already bought the tires, he might find they work with no problems.
FWIW, running the wrong size tires does not cause codes....it causes traction control engagement issues during normal driving....that (TC engagement) is a normal function, not a trouble code, and it can be avoided by simply keeping the rear tires taller than the fronts.
I usually suggest a 1/2" overall tire height difference front to rear to avoid any such issues...In this case..
A 265/35/18 and 295/35/18 combo would be suggested.
A 275/35/18 and 295/35/18 combo will work.
A 275//35/18 and 285/35/18 combo is getting borderline.
I'm not saying it will or won't work for sure, it's getting into that gray area where "some do, some don't" experience problems.
Tires aren't cheap, so I won't recommend someone go out and buy that combo....but if your friend already bought the tires, he might find they work with no problems.
Le Mans Master
Joined: May 2005
Posts: 6,366
Likes: 249
From: Fort Lauderdale, Florida
It'll be close, but he might be ok.
FWIW, running the wrong size tires does not cause codes....it causes traction control engagement issues during normal driving....that (TC engagement) is a normal function, not a trouble code, and it can be avoided by simply keeping the rear tires taller than the fronts.
I usually suggest a 1/2" overall tire height difference front to rear to avoid any such issues...In this case..
A 265/35/18 and 295/35/18 combo would be suggested.
A 275/35/18 and 295/35/18 combo will work.
A 275//35/18 and 285/35/18 combo is getting borderline.
I'm not saying it will or won't work for sure, it's getting into that gray area where "some do, some don't" experience problems.
Tires aren't cheap, so I won't recommend someone go out and buy that combo....but if your friend already bought the tires, he might find they work with no problems.
FWIW, running the wrong size tires does not cause codes....it causes traction control engagement issues during normal driving....that (TC engagement) is a normal function, not a trouble code, and it can be avoided by simply keeping the rear tires taller than the fronts.
I usually suggest a 1/2" overall tire height difference front to rear to avoid any such issues...In this case..
A 265/35/18 and 295/35/18 combo would be suggested.
A 275/35/18 and 295/35/18 combo will work.
A 275//35/18 and 285/35/18 combo is getting borderline.
I'm not saying it will or won't work for sure, it's getting into that gray area where "some do, some don't" experience problems.
Tires aren't cheap, so I won't recommend someone go out and buy that combo....but if your friend already bought the tires, he might find they work with no problems.
Last edited by striper; Jul 9, 2009 at 12:16 AM. Reason: error
Burning Brakes
Joined: Oct 2002
Posts: 833
Likes: 2
From: Pembroke, GA
and 265 and 285 represents the width of the tire how does that relate to the height? the 35 and the rim size relate to the height so a 35 series tire on a 18 inch rim will have the same height...right? and a 305 is the ideal size tire for a 11 inch rim ...
heres what Im running with no issues... Fronts 19 x 10 w/ 285-30ZR19 ---- Rears 19 x 11.5 w/305-30ZR19
heres what Im running with no issues... Fronts 19 x 10 w/ 285-30ZR19 ---- Rears 19 x 11.5 w/305-30ZR19
Last edited by MYLS6; Jul 9, 2009 at 08:37 AM.
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Where you are wrong, is with the second number - (30, 35 etc) is the profile, or series.
This number defines the sidewall thickness (and overall height) of the tire, but it is expressed as a percentage of the tire's width.
For example....255/35/ means the sidewall thickness in mm is equal to 35% of 255mm, or 89.25mm.
Now compare that to a 305/35/ tire...where 35% of 305 equals 106.75mm, it becomes clear that even though both are 35 series 18" tires...the wider tire is also taller in height, because of the thicker sidewall dimension.
The last number (17,18,etc)...is simply the diameter of the wheel where the tire seats.
Burning Brakes
Joined: Oct 2002
Posts: 833
Likes: 2
From: Pembroke, GA
Huh ok I actually related the 35 as to the hieght (i.e thickness sidewall) but I didnt realize it was a percentage calculation thats a new one one me. I just thought the 35 on a 285 was the same sidewall as a 35 on 305 thanks for the education!
