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platinum/ 1794 tundra tire measurements ON truck

Discussion in '2.5 Gen Tundras (2014-2021)' started by DexterL, Mar 9, 2020.

  1. Mar 9, 2020 at 6:10 PM
    #1
    DexterL

    DexterL [OP] New Member

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    Looking to get a measurement of newish stock 20in 275/65/20 tires on a truck- in inches preferably! Going to battle with a hypertech inline speedo recalibrator and this would make it much easier on getting the settings right. Even bigger win if you have a topper + decked system and an aftermarket bumper + winch- wishful thinking! Thanks everyone!

    edited for tire size
     
    Last edited: Mar 10, 2020
  2. Mar 9, 2020 at 6:37 PM
    #2
    Stumpjumper

    Stumpjumper Not a new member

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    Manufacturers diameter won't work for you? Air pressure is going to make a diff on installed tires. Formula for a 275/60/20 = 275/25.4×.6x2 + 20" . This is general. Manufacturers diameters will vary somewhat.
     
  3. Mar 9, 2020 at 6:40 PM
    #3
    DexterL

    DexterL [OP] New Member

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    Nope, need it on the truck, on the ground for most accurate reading.
     
  4. Mar 9, 2020 at 6:44 PM
    #4
    Stumpjumper

    Stumpjumper Not a new member

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    Not going to get most accurate due to different manufacturers, PSI, weight, tread depth, Etc.
     
  5. Mar 9, 2020 at 8:28 PM
    #5
    Fastestcolor

    Fastestcolor New Member

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    Those tires aren’t much bigger than the stock 275/55/20 that come on it. Well at least compared to what most folks on here put on.

    i put 275/60/20 Michelin LTX defenders on my limited. It looks great and after having these tires go 70,000 on my 4runner I won’t put anything else on a mostly street truck.

    I’m rambling but honestly recalibration my speedometer is the last thing I’m thinking about. It can’t be off by a noticeable amount.
     
  6. Mar 10, 2020 at 11:37 AM
    #6
    DexterL

    DexterL [OP] New Member

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  7. Mar 13, 2020 at 7:25 AM
    #7
    Mike19

    Mike19 New Member

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    Chi town
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    TRD Exhaust, Bilsteins 6112/5100, CB Shims 2/1, CB +3 Shackles, Air Ride, RCI Engine and Trans Skid Plates, Cooper AT3 XLT 275/65/20
    I measured my 275/65/20 Cooper AT3 XLT @45 psi and it's measuring 33.25" with 7K miles on it. It's far less than the state 34.1" spec.
     

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