Rim and tire fit

Discussion in 'OT Driven' started by uwofrost, Mar 10, 2008.

  1. uwofrost

    uwofrost New Denver Crew

    Joined:
    Nov 16, 2007
    Messages:
    1,223
    Likes Received:
    0
    Location:
    Greenwood Village
    Will 20" rims with 255/35/20s for the rear and 245/35/20s for the front fit on a 06 350z non brembro? Or are 255/30/20s needed?

    Thanks
     
  2. breal

    breal Active Member

    Joined:
    Jan 24, 2007
    Messages:
    5,456
    Likes Received:
    0
    Location:
    IN
  3. LA02MAX

    LA02MAX New Member

    Joined:
    Oct 29, 2006
    Messages:
    2,294
    Likes Received:
    0
    Location:
    Baton Rouge, LA
    20s don't belong on a 350z.
     
  4. uwofrost

    uwofrost New Denver Crew

    Joined:
    Nov 16, 2007
    Messages:
    1,223
    Likes Received:
    0
    Location:
    Greenwood Village
    so 255/30s then
     
  5. LA02MAX

    LA02MAX New Member

    Joined:
    Oct 29, 2006
    Messages:
    2,294
    Likes Received:
    0
    Location:
    Baton Rouge, LA
    spedometer reading with 245/35/20 is 0.3% too slow. When your speedometer reads 60 mi/hr you are actually traveling 60.2 mi/hr.

    spedometer reading with 255/35/20 is 1.3% too slow. When your speedometer reads 60 mi/hr you are actually traveling 60.8 mi/hr.

    Have fun making your car slower, handle worse, and get worse gas mileage
     
  6. BavarianMotorWe

    BavarianMotorWe New Member

    Joined:
    Jul 31, 2007
    Messages:
    218
    Likes Received:
    0

    Doesn't that just change what his speedometer reads? Hes not actually going any slower. You even showed hes going faster. Now with the weight added you will go slower in terms of how fast you CAN go. Hes got a 350z he already thinks his car is the fastest. I don't think he cares about the fractions of mph.

    Your right about the gas mileage and the handling.
     
  7. LA02MAX

    LA02MAX New Member

    Joined:
    Oct 29, 2006
    Messages:
    2,294
    Likes Received:
    0
    Location:
    Baton Rouge, LA
    No, read it again. It says "when you SPEEDOMETER reads xx, you are ACTUALLY traveling xx". It shows which is the better option because you choose the tire that's closest to the stock diameter. If that didn't answer your question, yes, those calculations are just for speedometer error.

    What will make his car slower is that more mass is distributed further away from the axis of rotation on 20" wheels as opposed to 18" wheels, and I doubt they'll be lightweight. Extra weight + larger diameter = harder for the car to turn them = slower, especially with a car that doesn't have V8 or diesel-like torque.
     
  8. RichieHemingway

    RichieHemingway New Member

    Joined:
    Jul 4, 2007
    Messages:
    2,910
    Likes Received:
    0
  9. uwofrost

    uwofrost New Denver Crew

    Joined:
    Nov 16, 2007
    Messages:
    1,223
    Likes Received:
    0
    Location:
    Greenwood Village
    The fraction of a MPH is not really that important. As for handling it would be better. the ride will be more stiff feeling. More rubber on the ground = better traction.... Or is that just wrong....
     
  10. uwofrost

    uwofrost New Denver Crew

    Joined:
    Nov 16, 2007
    Messages:
    1,223
    Likes Received:
    0
    Location:
    Greenwood Village
    If i wanted a race this i would be going for ultra light wheels... i want a sharp looking car. not a race car.

    [​IMG]
     
  11. uwofrost

    uwofrost New Denver Crew

    Joined:
    Nov 16, 2007
    Messages:
    1,223
    Likes Received:
    0
    Location:
    Greenwood Village

Share This Page