1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Upgrading to narrower tires on TRD

Discussion in '2nd Gen. Tacomas' started by trib, Jan 5, 2010.

  1. Jan 5, 2010 at 12:43 PM
    #1
    trib

    trib [OP] Well-Known Member

    Joined:
    Sep 24, 2009
    Member:
    #23280
    Messages:
    174
    Gender:
    Male
    Has anyone tried running 245/75/16s on their TRD? The truck comes with 265/70/16, however, traction sucks really in wet/icey/snowy conditions if you only have two wheel drive because there is very little weight on the rear axle. IMO a 265 tire is way too wide for a 3500lb truck. My 5700lb tundra came with 255s. I calcualte that a 245 would be about .8" narrower than a 265.

    Has anyone tried running narrower profile tires? How do they look and did you notice any improvement in traction? FYI I am planning to keep my stock 16x7 wheels.
     
  2. Jan 5, 2010 at 12:44 PM
    #2
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

    Joined:
    Dec 18, 2008
    Member:
    #11714
    Messages:
    48,248
    Gender:
    Male
    First Name:
    Ben
    Beech Creek
    Vehicle:
    05 Tundra SR5, 88 SR5 PU, 98 TRD OR (CRUSHED)
    5100's all on fours
  3. Jan 5, 2010 at 12:49 PM
    #3
    Taco-NB

    Taco-NB MMMMM Taco's

    Joined:
    May 1, 2009
    Member:
    #16662
    Messages:
    1,768
    Gender:
    Male
    New Brunswick
    Vehicle:
    '09 4X4 SR5 Access Cab V6 - Black Sand Pearl
    Skinnier tires are better for snow/ice and wide tires for dry conditions.
     
  4. Jan 5, 2010 at 12:50 PM
    #4
    Colton

    Colton Reagan/Bush '84

    Joined:
    May 25, 2009
    Member:
    #17626
    Messages:
    13,131
    Gender:
    Male
    First Name:
    Colton
    VA
    Vehicle:
    '08 4X4 TRD Sport Super white
    Pelfreybilt 3-hoop bumper, Bilstein 5100 F&R, OME 886 w/driver side top plate spacer, 1.5" AAL, 315/70/17 Hankook Dynapro AT, 17x9 Level 8 MK6, 20% tint, AEM Brute force intake, Alpine CDE-W235BT, Armortech sliders
    ^^ What 98tacoma27 said. With less tire mass on the pavement, less friction. With skinnier tires comes less friction/traction.
     
  5. Jan 5, 2010 at 12:52 PM
    #5
    ColtsTRD

    ColtsTRD .....

    Joined:
    May 13, 2009
    Member:
    #17177
    Messages:
    18,036
    Gender:
    Male
    First Name:
    Scott
    AZ
    Vehicle:
    2005 TRD DCSB
    x3
     
  6. Jan 5, 2010 at 12:52 PM
    #6
    Brunes

    Brunes abides. Staff Member

    Joined:
    May 31, 2008
    Member:
    #7011
    Messages:
    17,801
    Gender:
    Male
    First Name:
    Rotorhead
    Big Easy, USA
    Vehicle:
    08 Red/Graphite and Satin Black
    Inside: Tint, Wet Okole 1/2 Piped Red/Black Covers, Black Weathertech Digital Fit Mats, URD Short Throw w/ TWM Weighted Knob, USA Spec iPod adapter. Outside: 4300K Retro w/ Angel Eyes and Red Shrouds, 5000K Blazer Fog Light Retrofit, Debadge, Bed Locking Handle, Satin Black Rims Performance: TRD/Steigmeier Blower w/ 2.7 Pulley. 668 Injectors and 320 LPH AEM Fuel pump. URD UCON and 7th Injector. DTLT Headers, URD Y-Pipe, Wicked Flow Muffler. Suspension: Both: OME Shocks Front: 886X's and TC UCAs Rear: Dakars Armor: Relentless Front Bumper Relentless High Clearance Rear w/ Tire/Rotopax Swing Out Relentless Front, Mid, and TCase skids BAMF Diff Skid Recovery and Spares: Fullsize Spare Tire 2x2 gal Rotopax 1x1 gal Rotopax 1x1 gal Water Rotopax Warn 9.5XP-S Winch Hi-Lift Extreme 60" Ironman Off-Road Recovery Kit Upcoming: ATO Gas Tank Skid and Sliders w/ kickout. ATO Shackle Flip Kit. Down the line: Front/Rear ARB Lockers w/ OBA. 4.56 Gears
    With less contact patch the weight of the rear end is distributed over a smaller area...INCREASING pressure. Add weight over the axle with a smaller tire and you are more likely to hold the truck down in snow and crap....Ice is a whole different story.
    But with less width...there is less tire touching ground....so there is less friction.

    Interested to see what other folks have to say about this....
     
  7. Jan 5, 2010 at 12:53 PM
    #7
    Afwrestler1986

    Afwrestler1986 Well-Known Member

    Joined:
    May 20, 2008
    Member:
    #6768
    Messages:
    3,684
    Gender:
    Male
    First Name:
    Matt
    Johnstown, NY
    Vehicle:
    01 trd 4X4 ex cab manual
    Gray wire, Some lights in the bed area, and some character marks throughout.
    Essentially by narrowing the tire there is more PSI reaching the road.
    Wider thus makes less PSI.
    That being said, I run 265's and couldn't be happier with traction. Type tire has more to do with it when comparing .8" IMO.
     
  8. Jan 5, 2010 at 12:53 PM
    #8
    JDMcQ

    JDMcQ Well-Known Member

    Joined:
    Nov 7, 2008
    Member:
    #10561
    Messages:
    38,687
    Gender:
    Male
    First Name:
    John
    The Mushroom Capital of the World
    Vehicle:
    2006 Toyota 4Runner SR5 V8
  9. Jan 5, 2010 at 12:54 PM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    104,126
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    I have no idea about this "Ice" and "Snow" of wich you Yettis speak of. However, Im just here...to..........well....Im not sure...
     
  10. Jan 5, 2010 at 12:55 PM
    #10
    Afwrestler1986

    Afwrestler1986 Well-Known Member

    Joined:
    May 20, 2008
    Member:
    #6768
    Messages:
    3,684
    Gender:
    Male
    First Name:
    Matt
    Johnstown, NY
    Vehicle:
    01 trd 4X4 ex cab manual
    Gray wire, Some lights in the bed area, and some character marks throughout.
    Narrow tires CUT through Snow/slush
    Wider tires float/pack.

    With less surface area touching the road, the weight of the truck is multiplied and vice versa.
     
  11. Jan 5, 2010 at 12:55 PM
    #11
    pfatyol

    pfatyol Well-Known Member

    Joined:
    Nov 13, 2009
    Member:
    #25875
    Messages:
    705
    Gender:
    Male
    First Name:
    Patrick
    Southcoast MA & lakes region NH
    Vehicle:
    2010 DC Sport
    American Roll cover, fog light mod, weather tech, marathon seat covers, twin booster seats.
    Friction doesn't change with surface area.
    Force horizontal = Coefficient of friction * Force down (weight on tire)
     
  12. Jan 5, 2010 at 12:55 PM
    #12
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

    Joined:
    Dec 18, 2008
    Member:
    #11714
    Messages:
    48,248
    Gender:
    Male
    First Name:
    Ben
    Beech Creek
    Vehicle:
    05 Tundra SR5, 88 SR5 PU, 98 TRD OR (CRUSHED)
    5100's all on fours
    That's wrong Matt. It doesn't work that way. The greater the surface area, the greater the PSI. Think of pancake cylinders.
     
  13. Jan 5, 2010 at 12:55 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    104,126
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    Welcome to TW! :)
     
  14. Jan 5, 2010 at 12:58 PM
    #14
    JDMcQ

    JDMcQ Well-Known Member

    Joined:
    Nov 7, 2008
    Member:
    #10561
    Messages:
    38,687
    Gender:
    Male
    First Name:
    John
    The Mushroom Capital of the World
    Vehicle:
    2006 Toyota 4Runner SR5 V8
    If the weight stays the same and the surface area decreases, the PSI increases.
     
  15. Jan 5, 2010 at 12:58 PM
    #15
    Afwrestler1986

    Afwrestler1986 Well-Known Member

    Joined:
    May 20, 2008
    Member:
    #6768
    Messages:
    3,684
    Gender:
    Male
    First Name:
    Matt
    Johnstown, NY
    Vehicle:
    01 trd 4X4 ex cab manual
    Gray wire, Some lights in the bed area, and some character marks throughout.
    Think of a bed of nails. If you lay down on a bed of them your weight is more evenly dispersed thereby causing a lower PSI.
    If you step on the nail it will go through your foot due to more weight being focused to a smaller surface area.
     
  16. Jan 5, 2010 at 12:58 PM
    #16
    Colton

    Colton Reagan/Bush '84

    Joined:
    May 25, 2009
    Member:
    #17626
    Messages:
    13,131
    Gender:
    Male
    First Name:
    Colton
    VA
    Vehicle:
    '08 4X4 TRD Sport Super white
    Pelfreybilt 3-hoop bumper, Bilstein 5100 F&R, OME 886 w/driver side top plate spacer, 1.5" AAL, 315/70/17 Hankook Dynapro AT, 17x9 Level 8 MK6, 20% tint, AEM Brute force intake, Alpine CDE-W235BT, Armortech sliders
    Tell ya what... Go get a bike going 60mph and get your truck going 60mph and apply the same brake pressure to both and see which one stops the fastest. IMO, the truck would stop because there's more friction on the pavement from the truck tires is creating drag, reducing the speed.
     
  17. Jan 5, 2010 at 12:58 PM
    #17
    Taco-NB

    Taco-NB MMMMM Taco's

    Joined:
    May 1, 2009
    Member:
    #16662
    Messages:
    1,768
    Gender:
    Male
    New Brunswick
    Vehicle:
    '09 4X4 SR5 Access Cab V6 - Black Sand Pearl
    No .. Matt's right :D
     
  18. Jan 5, 2010 at 12:58 PM
    #18
    JDMcQ

    JDMcQ Well-Known Member

    Joined:
    Nov 7, 2008
    Member:
    #10561
    Messages:
    38,687
    Gender:
    Male
    First Name:
    John
    The Mushroom Capital of the World
    Vehicle:
    2006 Toyota 4Runner SR5 V8
    Exactly how a nail or a knife works, pressure concentrated in a small area.
     
  19. Jan 5, 2010 at 12:59 PM
    #19
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    104,126
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    Correct^^^^^
     
  20. Jan 5, 2010 at 12:59 PM
    #20
    Brunes

    Brunes abides. Staff Member

    Joined:
    May 31, 2008
    Member:
    #7011
    Messages:
    17,801
    Gender:
    Male
    First Name:
    Rotorhead
    Big Easy, USA
    Vehicle:
    08 Red/Graphite and Satin Black
    Inside: Tint, Wet Okole 1/2 Piped Red/Black Covers, Black Weathertech Digital Fit Mats, URD Short Throw w/ TWM Weighted Knob, USA Spec iPod adapter. Outside: 4300K Retro w/ Angel Eyes and Red Shrouds, 5000K Blazer Fog Light Retrofit, Debadge, Bed Locking Handle, Satin Black Rims Performance: TRD/Steigmeier Blower w/ 2.7 Pulley. 668 Injectors and 320 LPH AEM Fuel pump. URD UCON and 7th Injector. DTLT Headers, URD Y-Pipe, Wicked Flow Muffler. Suspension: Both: OME Shocks Front: 886X's and TC UCAs Rear: Dakars Armor: Relentless Front Bumper Relentless High Clearance Rear w/ Tire/Rotopax Swing Out Relentless Front, Mid, and TCase skids BAMF Diff Skid Recovery and Spares: Fullsize Spare Tire 2x2 gal Rotopax 1x1 gal Rotopax 1x1 gal Water Rotopax Warn 9.5XP-S Winch Hi-Lift Extreme 60" Ironman Off-Road Recovery Kit Upcoming: ATO Gas Tank Skid and Sliders w/ kickout. ATO Shackle Flip Kit. Down the line: Front/Rear ARB Lockers w/ OBA. 4.56 Gears
    No...You are wrong. ::Number are made up::
    The truck pushes 2500 pounds down on each tire
    If the tire has a 8in^2 contact patch...That is 312.5 PSI.
    If the contact patch is reduced to 7in^2 that is 357.1 PSI.

    Edit: Damn me and making math...Tooo sllloooowwwwwww
     
To Top