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Why do I need a high speed tire? #4102936 05/21/16 05:25 PM
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Chris142 Offline OP
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Been tire shopping. 2 places said I needed to spend extra $$$ because my truck ( 1987 f250 with a non turbo diesel) requires 112mph tires.

REALLY? 1. I dont drive that fast. A ticket at that speed and I'd go to jail. No thanks. 2. it's a non turbo 6.9 Diesel! It may hit 85 mph down hill against the 3800 rpm governor. I dont know of any older truck be it a Ford,Dodge or GM that would go that fast anyway.

I just hang out around 67mph in the slow lane anyhoo.

It does also require "E" rated tires. I am ok with that.


02 Wrangler traveler sae30
87 F250 Valvoline 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor Chevron sae30
Re: Why do I need a high speed tire? [Re: Chris142] #4102945 05/21/16 05:37 PM
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KitaCam Offline
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Discussed in dozens of threads....higher speed tires typically are built to take stressed maneuvers much more capably.


Kitacam is an 05 Camry LE/I4/MT; latest OC: 2/17 @ 142,300....PP 5w-30 with Toyo filter
Re: Why do I need a high speed tire? [Re: Chris142] #4102947 05/21/16 05:37 PM
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Rand Online Content
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S isnt a high speed rating.
What tire do you want that isn't S rated?

Some snow tires are Q or R rated

An example of requiring a high speed rating would be V rated tires on a econobox toyota.


2019 Jeep Cherokee Trailhawk 2.0T
Re: Why do I need a high speed tire? [Re: Chris142] #4102957 05/21/16 05:45 PM
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Chris142 Offline OP
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I'm not sure what they were. The girl quoted me a low price on a set then said I cant put them on my truck because they were not "S" rated. Then she quoted me another price or "S" rated tires that were nearly 2x the cost.

I'm wondering if she was trying to pull a switcheroo on me for some tires they had in stock?


02 Wrangler traveler sae30
87 F250 Valvoline 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor Chevron sae30
Re: Why do I need a high speed tire? [Re: Chris142] #4102967 05/21/16 05:54 PM
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eljefino Offline
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I smell something fishy. Buy the cheap tires out of spite. Are we talking retreads or something?

Re: Why do I need a high speed tire? [Re: Chris142] #4102968 05/21/16 05:54 PM
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d00df00d Offline
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Tires with higher speed ratings are generally better built and better balanced, AFAIK.

I always get the highest speed rating possible, all else equal.


2008 BMW M3 Sedan 6MT
Re: Why do I need a high speed tire? [Re: d00df00d] #4102974 05/21/16 05:59 PM
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Chris142 Offline OP
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Originally Posted By: d00df00d
Tires with higher speed ratings are generally better built and better balanced, AFAIK.

I always get the highest speed rating possible, all else equal.
Ya but we are talking $98 a tire vs $180ea.x4!


02 Wrangler traveler sae30
87 F250 Valvoline 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor Chevron sae30
Re: Why do I need a high speed tire? [Re: Chris142] #4102978 05/21/16 06:05 PM
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oldhp Offline
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Take your wheel/tire off your truck, then go buy what you want. If they ask......It's off my ratrod. Problem solved.


2018 RAM 1500 3.6/8 speed.
2019 Dodge Charger SXT 3.6/8 speed.
"When others cut you down, remember where they came from."
"I don't run...........I just wait"
Re: Why do I need a high speed tire? [Re: Chris142] #4102986 05/21/16 06:12 PM
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dparm Offline
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The speed rating is an indicator of how well the tire handles heat. If you are doing a lot of heavy-duty stuff, the tires will get hotter.


2017 Chevrolet Corvette Grand Sport
Re: Why do I need a high speed tire? [Re: Chris142] #4102992 05/21/16 06:16 PM
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supton Online Content
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I looked at tirerack.com and it shows some R range (106mph) for 1987 F250. LT215/85R16's. Dunno what is up, maybe the official database that these shops use is off.

What does the owners manual say? Should be some way to find the official rating required (doorjamb maybe).

If it matters, find another set of rims, order tires online and pay to have them mounted/balanced off the truck.


2011 Toyota Camry, base, 2.5L/6MT, 187k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 153k, ours
1999 Toyota Camry LE, 2.2L/4AT, 209k, his
Re: Why do I need a high speed tire? [Re: Chris142] #4102996 05/21/16 06:18 PM
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You only need a tire with the speed rating specified in your owners manual. If the salesperson pushes anything else, it's an upsell.


2013 Honda Accord LX, 61K, 2nd owner
2007 Honda Ridgeline RTS, 91K, 1st owner
2007 Infiniti M35, 113K, 1st owner
Re: Why do I need a high speed tire? [Re: oldhp] #4103006 05/21/16 06:26 PM
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steveh Offline
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Originally Posted By: oldhp
Take your wheel/tire off your truck, then go buy what you want. If they ask......It's off my ratrod. Problem solved.
That is what the guy working at Walmart told me to do.

Re: Why do I need a high speed tire? [Re: Rand] #4103026 05/21/16 06:53 PM
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Originally Posted By: Rand
S isnt a high speed rating.
What tire do you want that isn't S rated?

Some snow tires are Q or R rated

An example of requiring a high speed rating would be V rated tires on a econobox toyota.


Many load range E truck tires are Q (99MPH) rated.


1979 Coupe de Ville, 542 stroker, 15W-40 Super Tech, Delco
2011 Crown Vic P71, 5W-20 Super Tech, Super Tech
2011 Sportster 883, 20W-50 SYN3, HD black
Re: Why do I need a high speed tire? [Re: Chris142] #4103032 05/21/16 06:57 PM
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It isn't illegal to install a tire with a lower speed rating than originally equipped, but most shops won't do it out of fear of getting sued.

What trim level is your truck (Custom/XL/XLT/Lariat)? What tire size? GVWR 6300 or 7300?

Are your tires LT235/85-16?

I looked up every combination for your F250 on Walmart's tire finder, and none of them seem to require the S speed rating. (Walmart WILL NOT install tires with a lower speed rating, so if it's on their site, then you're good to go)

Walmart has S-rated Kumho tires for $131 each.

Re: Why do I need a high speed tire? [Re: slacktide_bitog] #4103058 05/21/16 07:29 PM
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Chris142 Offline OP
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Originally Posted By: slacktide_bitog
It isn't illegal to install a tire with a lower speed rating than originally equipped, but most shops won't do it out of fear of getting sued.

What trim level is your truck (Custom/XL/XLT/Lariat)? What tire size? GVWR 6300 or 7300?

Are your tires LT235/85-16?

I looked up every combination for your F250 on Walmart's tire finder, and none of them seem to require the S speed rating. (Walmart WILL NOT install tires with a lower speed rating, so if it's on their site, then you're good to go)

Walmart has S-rated Kumho tires for $131 each.
lariat.was originally 235/85/16.i put 285/75/16 on it last time.looking at a 265 now hoping for a little better hill pulling power since it only has 3.55 gearing.gvr 8800 lbs

Last edited by Chris142; 05/21/16 07:30 PM.

02 Wrangler traveler sae30
87 F250 Valvoline 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor Chevron sae30
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