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Discussion Starter #1
I did a bunch of homework on what's available for the 20 inch wheel in an All-Terrain tire and size wise it really comes down to a 275/55/20 if you are looking for an A/T that has the parameters I was looking for.

The owners of a LR dealership local to me put the 285/50/20's on their full size Range Rover but can't lower it without rubbing (wheel wells are same size as RRS). The 285's are the same circumference as the stock tire, but they're considerably wider. The width is apparently the problem.

I have read of other people going with the 285, but I was advised against it by several tire dealers who know the '14 RRS. Caveat Emptor...

The 275's are a little wider than stock, but just about an inch taller. Plenty of calculators on the webs if you want to see how they all size up. Bottom line: perfect fit. Fill the wheel well nicely, stay inside the body panels and no rub anywhere under any condition.

One note, the computer is adjusting to the tire size for mileage calcs et al, but the speedo is no doubt off a bit. I spoke with my dealer who said it cant be adjusted, but I also spoke with an independent who said "no problem." In any event, heard from guys that say they didn't even bother loading the new tire size. I'm going to GPS it and see how far off I am.

Ok, so which tire? I focused on a "true" all terrain tire that was as mild as possible in tread design, sacrificed as little as possible in on-road performance, and was as quiet as an A/T can be. I looked at everything.

I ended up with the Discount Tire aka Americas Tire Co. proprietary version of the Cooper Discover AT3. Based on hours of research, the AT3 is the best of the bunch. Of course everyone has their favorite, but the positive comments from reviewers and the boards were overwhelmingly positive over any other tire.

I chose the Discount Tire version called the ATP. You can only buy this version from them. The tire is identical to the AT3 except that it has its own distinctive tread pattern. The tread is similar to the Cooper LTZ, which appears to be popular with a lot of the Land Rover LR series guys. But, per Cooper, the AT3/ATP are the most advanced A/T tire they make now.

I spoke with Cooper Tires Corporation directly about the two versions and was told that the ATP runs a little quieter than the AT3. Other than that, no difference. From a looks perspective the ATP is a clear winner over the AT3 IMHO. Either way, both great tires.

Best part is that the 275/55/20 can be dropped at your door for about $150.00 per tire after rebates. Or, you can go to your local tire store and pay a little bit more. Either way, they are a lot of tire for the money. Consumer reports rates them over everything, for whatever that's worth.

I've put about 300 miles on the tires. They lose to the stock Michelin Latitudes at the limit which is to be expected and turn in isn't quite as sharp. I can feel that it's a stiffer tire and maybe a little heavier. All that being said the handling dynamics really haven't changed . Ride is very smooth and quiet. I don't miss the latitude Sports at all.

I was told to run the fronts at 30lbs and the rears at 40lbs. However, based on load limits between the AT3 and the Latitude you could lower the AT3 down to 26lbs and it still rated for more weight than the Michelin. No reason to run that low, though.

The tires really transform the look of this truck IMO. It looks like an SUV that means business. Frankly, LR should offer an A/T as an option.

I also had the tire dealer drop one of the new mounted tires into the spare tire carrier and it fits perfectly. Lid is flat.

I cant believe LR puts a frigging "spare" in any of their RRS's. Its a ****ty skinny tire on a steel wheel. They pack the compartment with Styrofoam so they can load a full sized tire in there if they want to. What a joke.

I'll load some pics shortly but they aren't very good.

in the meantime - http://www.discounttiredirect.com/direct/findTireDetail.do?ra=filterTireProducts.do&fl=&pc=15946&counter=0&ar=55&rd=20&cs=275
 

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Great writeup. Do you know if those are available in 21"?
Guessing 275/50/21 would fit okay or maybe 275/45/21
 

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Discussion Starter #3
Great writeup. Do you know if those are available in 21"?
Guessing 275/50/21 would fit okay or maybe 275/45/21
thanks. All sizes are listed on their website but maw sure to look in the light truck and SUV section. otherwise you might miss a size
 

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If you get the tow package, the car comes with the same wheel / tire and as the other four instead of the skinny spare. Great deal!
 

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Discussion Starter #5
you must be one of those 14.5 guys. I'm a lowly 14. Got sprayed for $1,450 to have my dealer install a hitch.
 

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Discussion Starter #6
One more comment on tire sizing for a more aggressive mounted to the 20" wheel:

You can run a 275/50/20 which almost equals the 255/55/20 that comes stock, but there are very few choices as I saw it. Also, the tire isn't quite as tall as stock. Very small difference, but I was looking to pick up some extra clearance.
 

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Discussion Starter #8
photo's please....
t

Like I said crummy pics. I've attached a link to some pics of the Cooper Zeon LTZ. My tire, the ATP is very similar in look but the sidewall on the ATP isn't so aggressive like the LTZ. The side profile on the ATP is much more attractive to me.

https://www.google.com/search?q=pictures+of+cooper+discoverer+at3&tbm=isch&tbo=u&source=univ&sa=X&ei=Gdo6U6jrI8PmyQGa-4HoDg&ved=0CEsQ7Ak&biw=1280&bih=592#q=pictures+of+range+rover+sport+with+zeon+ltz&tbm=isch
 

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Discussion Starter #9
Here are a couple more. Stock tire are roughly 31" my new tires are 32" which means I was able to roll up that foot tall rock. Stock tire would have put my bumper into stone. Imagine 35's on these trucks. Cant wait to embarrass someone out at the desert. Until they see me worrying about scratches that is...
 

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Thanks for posting this! I've been investigating off-road tires as well, since the stock tires are inadequate for the back roads of Hawai'i's Big Island. Sadly, there are no Discount Tire stores here in Hawai'i, and the drive to California is through a pond a bit too deep for even the Range Rover, so my quest continues. But I now have a size I know will fit!

Thanks for the pics - your RRS looks great with the new 'shoes.'
 

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Looks nice Desert. We have the same color. I just installed my door moldings last night. I see you've got the mud flappers too. :wink:
 

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Cant wait to embarrass someone out at the desert. Until they see me worrying about scratches that is...
So true - I would love to take mine to use it as intended as well, but am still too worried about the scratches - give me a few months!! Tires look great - truck looks mean with some true all terrain shoes.
 

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Discussion Starter #14
Looks nice Desert. We have the same color. I just installed my door moldings last night. I see you've got the mud flappers too. :wink:
Yeah I'm digging the white. I like the look of the door moldings, and the mud flaps look good in person too.

Did you happen to catch the silver side mirror covers? Also added the silver rails for the racks. Kind of balances things out with the black wheels.

Boys and their toys...
 

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Yeah I'm digging the white. I like the look of the door moldings, and the mud flaps look good in person too.

Did you happen to catch the silver side mirror covers? Also added the silver rails for the racks. Kind of balances things out with the black wheels.

Boys and their toys...
The mirror covers look cool. I keep trying to stay with you as far as mods and you keep pulling ahead of me. Mine is only 4 days old however.;-)
 

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Fantastic info, Dave. Thanks for doing all the research! Will definitely go with these tires once my RRS arrives.
 

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Very nice set up. I have tried installing 19s on my 2014.5RRSC full size but the wheels would touch the calipers. I unfortunately have 21s so there is no tire option. I'm currently looking to get 20s. Also there is no aftermarket rack so I cant install roof top tent :(
 

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I have to disagree on the AT3 and ATP comparison. AT3 is LT rated tire and ATP is not and it is a big difference when you are off road. Unless they don't mention anywhere that ATP is LT rated.
 

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Even if you did find a factory or aftermarket 19" rim able to clear your oversize brakes, you'd find the selection of decent A/T tires in that size to be even more pathetic than in 20".
 
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