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Tire size suggestion for 17" rims?

Discussion in 'Wheels & Tires' started by louie68, Jun 16, 2017.

  1. Jun 16, 2017 at 7:02 AM
    #1
    louie68

    louie68 [OP] Member

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    I'm new to the Jeep world I have a 2017 Jeep Wrangler, 3.73 gears, I would like to move up to a bigger size tire with 17 inch rims but I don't want to lose power. can anybody recommend a good tire size?
     
  2. Jun 16, 2017 at 9:02 AM
    #2
    goinginjeep

    goinginjeep Well-Known Member

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  3. Jun 16, 2017 at 9:28 AM
    #3
    louie68

    louie68 [OP] Member

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    So the biggest i can go is 265
     
  4. Jun 16, 2017 at 9:30 AM
    #4
    louie68

    louie68 [OP] Member

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    265 is almost a 33in tire so 33/12.5R17 would be ok
     
  5. Jun 16, 2017 at 9:36 AM
    #5
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    A 265 is the tire width. Depending on the aspect ratio, the height can be anything. For example, a 265/75/17 is 32.6" tall, and 10.4" wide. A 285/70/17 is 32.7" tall, and 11.2" wide. A 33 X 12.50 17 is as it states, 33" tall (actually 32.6") and 12.5" wide. Anytime you add more rotational mass, it takes more work for the engine to overcome the rotational weight, and a larger diameter reduces the overall gear ratio, this reducing the amount of rim pull. Any increase in tire size will affect the performance of the vehicle. To what degree depends on the size increase.
     
    JKBob 25 likes this.
  6. Jun 16, 2017 at 10:15 AM
    #6
    louie68

    louie68 [OP] Member

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    Thanks I completely understand, the weight and larger sizes tires and rims will make the engine work harder, Just wanted to know from other jeepers what size tires and rims they are running with a 3.6 automatic trans with 3.73 gears. I know I will lose power and fuel, but I just don't want it to be a dog on the road and on hills. Thanks for all the help
     
  7. Jun 16, 2017 at 3:48 PM
    #7
    aggrex

    aggrex Well-Known Member

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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Flash to tire size and gearing otherwise both speedo and trans shift points will be off. Consider regearing for optimal performance when running larger than stock tires.
     
    JKBob 25 likes this.
  8. Jun 16, 2017 at 5:43 PM
    #8
    louie68

    louie68 [OP] Member

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    where do i get the flash done, do i buy the flash myself and do it, im use to doing it for my GT mustang, when i flash will it change shift point, and speedometer, so much to think about. install in new gears can be expensive
     
  9. Jun 16, 2017 at 7:23 PM
    #9
    OFFGRID

    OFFGRID Well-Known Member

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    You can by a flash (programmer) that is reuseable if you change tire size or gear ratio in the future. I use Hypertech, but there are many good ones out there.

    I assume you mean how big of a tire can you go without regearing and not feel like a dog. That is a tricky question. I ran 37s on a 3.73s for a while on my JKU with a 3.8L. It was kindof doggy. Didn't really like highway speeds. Now, I have 40s and 5.38 gears. Still runs like a dog and doesn't like highway speeds. but it is not my DD. I think 35s would be pushing it on 3.73 for good streetability.
     
    aggrex and JKBob 25 like this.
  10. Jun 16, 2017 at 9:00 PM
    #10
    louie68

    louie68 [OP] Member

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    Thank you for all the help, i cant believe the great help ive gotten from other jeepers, this my first jeep, but not my last
     
  11. Jun 17, 2017 at 9:49 PM
    #11
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Its always good to help. Never know when you might need a tug out of a tough spot :) Let us know what you go with.
     
  12. Jun 18, 2017 at 5:48 AM
    #12
    louie68

    louie68 [OP] Member

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    Thanks will do,
     
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