Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE Membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Which tire is close to a 35?

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by AntAZBlaz, Apr 2, 2002.

  1. AntAZBlaz

    AntAZBlaz 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    273
    Likes Received:
    0
    Location:
    Mesa AZ
    I was wondering which tire is close to a 35 when they use 285/75r16 type of codes? I would like to pick out a 35/12.5/17 or 16. but they are all measured with the other sysem.
     
  2. chaka454

    chaka454 1/2 ton status

    Joined:
    Nov 13, 2001
    Posts:
    199
    Likes Received:
    0
    Location:
    California
    I believe it's the 315/85/16 the ones I got are 35s and they are 315s but if I'm wrong somebody please feel free to step in.
     
  3. Triaged

    Triaged 1/2 ton status

    Joined:
    Feb 21, 2001
    Posts:
    3,808
    Likes Received:
    0
    Location:
    CA (LA/OC area)
  4. AntAZBlaz

    AntAZBlaz 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    273
    Likes Received:
    0
    Location:
    Mesa AZ
    I was looking to buy some MTR's some day and the larger rims are all measured in the other system.
     
  5. jeffer

    jeffer 1/2 ton status

    Joined:
    Nov 6, 2000
    Posts:
    113
    Likes Received:
    0
    Location:
    Loveland, Colorado
    Here's how to figure that. With the 285/75r16 system.
    285=Section Width (mm),
    75 = Aspect Ratio (%),
    16 = Rim Diameter (inch).
    How to figure real tire height: H=2*(Section Width)*(Aspect Ratio)/100/25.4(mm/inch) + Rim Diameter

    So, if you want 12.5 inch wide = 12.5inch*25.4mm/inch = 317.5mm --> go with a 315 tire.

    For 17inch rims, a 315/75R17 tire will be 35.6/12.4/17 or a 315/70R17 tire will be 34.4/12.4/17
    For 16inch rims, a 315/75R16 tire will be 34.6/12.4/16 or a 315/80R16 tire will be 35.8/12.4/16

    The 315/85R16's would actually be 37.1/12.4/16. But, there are only so many combos available so take what you can get.

    I've seen websites before with all possible combinations and their 'real' dimensions, just can't remember where. Hope that helps.

    Jeff.
     

Share This Page