Steven Buhrke
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• Tucson, AZ, USA |
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• Registered on 12/2/2003 |
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• 5 posts |
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 Posted:12/4/2003 01:49 |
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I am a bit of a newbie, and feel free to correct me as is probably needed, but here is how I see the tire size question.
Instead of looking at the numbers 305 70r16 look more closely at the manufacturers OD rating, if its under 33" they will probably fit stock as long as they are not to wide. I am guessing here but 12" seems about max width at that height. If you only look at the tread width and rim height you are not looking at tread depth and series height.
I know that(for example) on the Nitto website they give a chart for their tires and you see tires at 305 not standing as tall (OD) as 295 or 285 because of seires height or tread depth or a combination. If you go there look close at some of the tread depths.
Also, most people overinflate their tires to the max load psi rating. The only reason to load a tire to max pressure is if you need it, ie carrying big payload. So if you get a tire thats a little to big at max pressure and you are not regularly carry a big load, let some air out and drop the tire down.
I am also looking to put some new rubber on by next spring and will have to decide if I want to lift or not, and what size tire to decide on, so I would love to here some reaction to what I have said.
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William Rodie
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• Dallas, TX, USA |
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• Registered on 12/6/2003 |
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• 3 posts |
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 Posted:12/6/2003 13:21 |
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hi All,
I am not  YET an Excursion owner. But I have used this in the past for calculating Tire size situations.
Also, the
Tire size calculator:
http://www.miata.net/garage/tirecalc.html
Article on sizing:
http://ftw.truckmoxie.com/tenarticle.asp?aid=337&sid=2
The sidewalls are decoded as follows:
Example: 305/70R18
First set of numbers (305) stands for the width of the tire in millimeters
Second set of numbers (70) stands for the aspect ratio of the tire. The larger the number the higher (taller in diameter) the aspect ratio will be. In other words, there is more sidewall rubber with a 70 series tire than there is with a 35 series tire.
Third set of numbers (ZR) where the "Z" stands for the speed rating of the tire and the "R" means the tire is a radial design. The speed ratings go as follows: S=112 mph, T=118 mph, H=130 mph, V=149 mph, W=168 mph, Z=over 149 mph
The fourth set of numbers (1 stands for the wheel diameter size that the tire is manufactured for. In this case, the wheel should be 18-inches in diameter.
Make sure your wheels also are capable of handling the load rating required by the truck manufacturer.Many tires are now including a fifth set of numbers which starts at 88 and goes upwards. The higher the number, the higher the load rating for the tire. This is key to matching the load rating of the tire with the load rating required by your truck's manufacturer, and the load rating of your truck's wheels. The tire's sidewall will also have a Max. Press. number that says what the maximum pressure is for the maximum load rating of the tire.
regards,
Rodie |
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Vince Powell
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• Burlington, NC, USA |
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• Registered on 1/13/2004 |
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• 35 posts |
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Posted:2/17/2004 13:37 |
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Will installing 285's void the warrenty on an 04? |
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birdman127
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• baltimore, MD, USA |
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• Registered on 10/13/2002 |
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• 581 posts |
• 1
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Posted:2/17/2004 15:27 |
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NO
Moderator
Scott
2000 ltd 6.8 V10*4.30LS*
Lots of mods
check my gallery
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Douglas Dircks
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• New Richland, MN, USA |
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• Registered on 11/13/2003 |
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• 118 posts |
• 1
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Posted:2/17/2004 18:49 |
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I ran 295 BFG's on the pickup for 83,000 miles (33'sx11's). Now wears another set of BFG's. The truck was bought used with Goodyear AT's 285's that were bald at 40,000 miles.
The X came with brand new Goodyear AT's in stock size so they will stay put until they need to be replaced. Heard of some guys running Firestone Steetrex for over 100,000 miles but they only make small tires.
00 Excursion Limited 4x4 PSD 265/75/16 Ravo's Centerline rims Python 871XP
99 F250 x-cab short bed XLT 4x4 PSD 295/75/16 American Racing rims Viper 550 ESP stainless steel MAAP nerf bars Putco four piece grill inserts bumper poles and mud flaps air bags triple pillar pod Autometer Ultra Light fiberglass tannue cover and topper programmed pcm pulling 22 psi
99 F350 crew cab long bed drw Lariat 4x4 PSD 255/85/16 Python 871XP AIS fold down fifth wheel ball |
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chris w
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• Vero Beach, FL, USA |
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• Registered on 2/24/2004 |
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• 2 posts |
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Posted:2/24/2004 18:23 |
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I have the BFG AT 295's on a stock 4x4 X..I only have about 1500 miles on them but so far I like them..for an open wall they are quiet and are pretty aggressive in mud(only had it in the mud 3 times)..I also have the 315 Goodyear AT's on an f350 and are not very happy with them..definetly go with the BFG's |
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RickyG
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• Lubbock, TX, USA |
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• Registered on 5/10/2003 |
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• 24 posts |
• 1
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Posted:2/25/2004 11:04 |
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I am running the Cooper AT's 285's on a stock 2000 4X4 V-10 with no problems, not a single rub here. I am very pleased with the tires so far. I only have about 1500 miles on them, and no complaints.  |
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