Please Help With Tire/Rim Question...

[Jon]

I've got a 2000 Chevy K2500 all stock. I would like to put some larger tires, but want to see if I can use my stock rims. (I have 245 75/16). Can the stock ones be used say for a 285 75/16R??? What are the dimensions of my stock wheel WIDTH... is it 6.5?... 7.0/7.5? Any help is much appreciated!!



Jon

[stumpuller454]

I beleive its 6.5" and 285s are no prob fitting... although it will be a tight fit unless you do some trimming or lifting. I used to run 315s on stock 3/4 ton gm aluminum wheels for years, and it was ona off road beater truck, never had a problem....

[FaselZ71]

Yup true that!!! Those tires will fit right on... May rub alittle in the turns but will fit those rims like a glove!! It's when you get into the 31" to 33-10.50's is when you need to think about new rims!!

[dave8590]

yea i got 315 75 R16 on stock rims on a 1500, they rub a lil when i turn tight but other then that they fit great and i use the truck on and off road

[87c10slammer]

the 285 is the width of the tire and the 75 would be the hight of the tire.. so really all your doing is putting a wider tire on your rims...

[mudseeker]

Originally Posted by 87c10slammer

the 285 is the width of the tire and the 75 would be the hight of the tire.. so really all your doing is putting a wider tire on your rims...

not quite true. while the tire will be wider, it will also be taller at the same time. your aspect ratio (75) will determine how tall your tire will be.

{copy/paste}
Section Width

Following the letter(s) that identify the type of vehicle and/or type of service for which the tire was designed, the three-digit numeric portion identifies the tire's "Section Width" (cross section) in millimeters.

P225/50R16 91S
The 225 indicates this tire is 225 millimeters across from the widest point of its outer sidewall to the widest point of its inner sidewall when mounted and measured on a specified width wheel. This measurement is also referred to as the tire's section width. Because many people think of measurements in inches, the 225mm can be converted to inches by dividing the section width in millimeters by 25.4 (the number of millimeters per inch).

225mm / 25.4 = 8.86"

Sidewall Aspect Ratio

Typically following the three digits identifying the tire's Section Width in millimeters is a two-digit number that identifies the tire's profile or aspect ratio.

P225/50R16 91S
The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width. The measurement is the tire's section height, and also referred to as the tire's series, profile or aspect ratio. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall. We know that this tire size's section width is 225mm and that its section height is 50% of 225mm. By converting the 225mm to inches (225 / 25.4 = 8.86") and multiplying it by 50% (.50) we confirm that this tire size results in a tire section height of 4.43". If this tire were a P225/70R16 size, our calculation would confirm that the size would result in a section height of 6.20", approximately a 1.8-inch taller sidewall.

[87c10slammer]

ok so it would be .78' taller and and 1.59' wider...