Tires for the 19" wheels - Goodyear Wrangler All-Terrain Adventure DONE!!!

Discussion in 'LR4' started by jeffdude, Jan 9, 2017.

  1. jeffdude

    jeffdude Member

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    Well I bit the bullet and took off the barely lightly used Conntis that came stock with the LR4. it was a tough choice between the new Continental Terrain contact and the 1" larger Goodyear Wrangler All-Terrain Adventure. They were put on this weekend and I had plenty of snow to play in to validate my choice. They are smooth, look good and and stop/start and corner in the ice/snow. Could not be more pleased.

    I was a little concerned with the additional inch at first until I found it still fit in my garage.

    The size I went with was a 255/60r19.

    Anyone need a set of the stock Continentals with 7-8/32" left???



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  2. catman

    catman Full Access Member

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    Would love to see photos of the tires on the LR4. I know safaridave is debating about this same tire on his LR3 in the same size (31"), but using 18" wheels (255/65/18).
     
  3. eli4x4

    eli4x4 Member

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    Can you post some pics, I'm also looking for a set
     
  4. manoftaste

    manoftaste Full Access Member

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    pix, pix, pix!
     
  5. greg.t.bodene

    greg.t.bodene New Member

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    I was interested in those but my Les Schwab wouldn't sell them as they didn't meet the load rating according to them. Did you have any issue with that?

    Sent from my Nexus 5X using Tapatalk
     
  6. ryanjl

    ryanjl Full Access Member

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  7. umbertob

    umbertob Full Access Member

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    That's true, Land Rover recommends an XL tire at a minimum for the LR4. Most reputable tire stores won't install SL tires as a result (if they check the manufacturer'so specs.)
     
  8. catman

    catman Full Access Member

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    I think most shops will look at the load rating more than XL versus SL. As long as the load rating is adequate a SL tire should perform safely on the road. Of course, if you venture off-road or drive really fast, there are other considerations. I am not sure I have seen Land Rover specify XL anywhere, other than most of the OEM tires seem to have been XL rated.

    It gets a bit complicated, as one reason for XL tires is to gain a certain load capacity within a smaller tire. Obviously, as tires get larger, their inherent load capacity goes up. That is why many larger than stock SL tires you might use on an LR3/LR4 will have sufficent load capacity. Also, the speed rating of the OEM tires are generally higher than you will find on all-terrain tires. The higher speed rating is a function of tire construction and its capacity for heat dissipation, which is separate from actually being XL or SL. XL and SL construction differences are strictly for load rating. Speed rating, lateral stability, traction, etc are all controlled by other factors (such as compounds, thickness in certain parts of the tire, etc.). This is coming from a tire engineer, not me.

    You'll notice the 2016 OEM specs below show a 109 load rating for the 20" wheels, but 111 for the 19" wheels. This is because there is simply more air capacity in the 19" tire. But, the lower load rating of the 20" tire has a higher speed rating, which is not by accident. I am not aware of how the actual wheels themselves impact the needed load rating of tires, or if they have any impact at all.
    Load/speed index Front pressures psi (bar/kPa) Rear pressures psi (bar/kPa)
    255/55 R19 111V 36 (2.5/250) 42 (2.9/290)
    255/50 R20 109Y 36 (2.5/250) 42 (2.9/290)


    The 19" version of the Adventure tire is rated at 109, which is on the low side, especially if you factor in the lower T speed rating. Combine that with packing up that roof rack with gear and possibly hauling a bunch of people too and it could become questionable under certain cirumstances. The 18" version is an identical 31" tire but has a 111 load rating simply because there is more air capacity. Therefore, the 18" version might actually work a little better for anyone running smaller wheels.

    The bottom line is that as the wheels get larger, the tires will have less air capacity, and will therefore need more reinforcements to attain similar specs to larger tires on smaller wheels. This is where the XL/SL and speed ratings come into play. There is not one perfect answer as to what is acceptable, it comes down to what you do with your vehicle. When in doubt, follow the OEM original specs or exceed them and you should will be fine.
     
    Last edited: Jan 10, 2017
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  9. jeffdude

    jeffdude Member

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    After 5 days of snow, high winds (30 mph+), rain and a 60x2 mile trip today. Tires worked well in all cases. I do not feel any additional roll or sound above noise from my rack. There may be a slight loss of mpg...will let you know.


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    Last edited: Jan 10, 2017
  10. jeffdude

    jeffdude Member

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    Ride update - 15 son noted that the car is not as "squishy" in the turns and feels more solid. 41psi around the corners.
     

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