2 Month Grade Card

[nadrojcote]

 

What is standard on this truck? I searched tirerack for 255/70R17 (a guess) and the highest speed rating I found was T.

 

The cheapest Ts were $8 more than the cheapest Ss. I know GM negotiates quantity deals and such, so this is ballpark at best, but $8 over 500,000 trucks/yr works out to $4 million/yr. Speed limiting the trucks to save on tires certainly seems plausible.

2$ difference on onlinetires.com

 

http://www.onlinetires.com/user/vehicle/tires/all_brands/106.33/all_sizes/all_types/all_speeds/page_2.html

[Strykers_Inc]

 

What is standard on this truck? I searched tirerack for 255/70R17 (a guess) and the highest speed rating I found was T.

 

The cheapest Ts were $8 more than the cheapest Ss. I know GM negotiates quantity deals and such, so this is ballpark at best, but $8 over 500,000 trucks/yr works out to $4 million/yr. Speed limiting the trucks to save on tires certainly seems plausible.

 

Option was the key term I had meant to emphasize. Its plausible I do agree. And at the same time the guy that drives around with a base standard truck is most likely not the guy trying to break the land speed record either. BTW my GM Performance Parts tires (Alenza H/L) start at H.

 

Saving who $8 per tire. GM? They are getting tires at cut rate from the manufacturer not from tire rack, so buying in bulk makes sense for GM and they will procure the most popular tire for cost savings of course, but also because its more abundant. Alot of those tires are not being sold on the lot because the dealer has so many ways to make it more appealing to the customer. The tires and wheels the truck was shipped with are not on the truck when it is sold on many occassions. I know for a fact my truck showed up at the dealer with wheels and tires that were returned to GM, not the dealership. The dealership changed the wheels and tires as per the options I ordered the truck with.

 

L

75 mph

120 km/h

Off-Road & Light Truck Tires

 

M

81 mph

130 km/h

Temporary Spare Tires

 

N

87 mph

140km/h

P

93 mph

150 km/h

Q

99 mph

160 km/h

Studless & Studdable Winter Tires

 

R

106 mph

170 km/h

H.D. Light Truck Tires

 

S

112 mph

180 km/h

Family Sedans & Vans

 

T

118 mph

190 km/h

Family Sedans & Vans

 

U

124 mph

200 km/h

H

130 mph

210 km/h

Sport Sedans & Coupes

 

V

149 mph

240 km/h

Sport Sedans, Coupes & Sports Cars

 

 

 

.....while you were on Tire Rack did you not see the same chart as me. Those same S rating tires are listed as per their chart for Family Sedans & Vans. Not trucks. So the assumption their would mean what? That everyone that recieves a truck from GM with S rated tires has tires on their vehicle that are not meant to be on there. Or that GM is purposely providing you with tires not meant to be on your vehicle in the first place. Man, those GM guys!

 

...My whole point in even addressing this is stop making assumptions for GM and why they do things, and why people like to drive fast! For the most part, those of us that do have hopefully done their homework.

[nadrojcote]

Not that they can't be on a truck, they just cant support as heavy of a load. Pretty sure the bridgstones are P metric as well are they not? They should at least use an XL p metric in my opinion, but in all reality most people buying these trucks aren't going to haul much.

[Strykers_Inc]

Not that they can't be on a truck, they just cant support as heavy of a load. Pretty sure the bridgstones are P metric as well are they not? They should at least use an XL p metric in my opinion, but in all reality most people buying these trucks aren't going to haul much.

 

 

That seriously wasnt a real question.

 

And you are getting what I am meaning by your statement "but in all reality most people buying these trucks aren't going to haul much".

 

.....but it sure comes in handy when those Zombies start coming over the ridge! (Yes I am kidding! No seriously!)

[ghgmi]

Saving who $8 per tire. GM?

 

Yes, exactly, saving GM. The "$8" was a quick number I gleaned from tirerack and have no idea what the real number is. My point is that any dollar amount multiplied by 1/2 million adds up quickly.

[WendysOrBust]

This seems to be incredibly hard for you to understand;

 

 

You cannot say this is not an assumption when you use the core word in your statement.

 

.........."My comment on why manufacturers limit top speed on certain vehicles is based on the assumption that they do not design a vehicle for that treshold the same way they don't design cars to have higher towing capabilities.".....

 

 

 

 

 

Manufacturers ≠ Truck Customer; do you not get this? Is this so hard for you to understand? GM has their reasons for limiting top speed. That is the point. They limit it and that is that. The fact that this is an important factor for you, as you have stated multiple times, is irrelevant to GM. And for the record because you seem to have this confused, top speed ≠ fast, because fast is subjective to each individual.

 

GM does not go out and advertise their pickup trucks at 150, 170mph. In no GM brochure, magazine review, or any other form of medium is a trucks top speed even discussed or brought up as a selling point. You know what is? Durability, pay load, towing capabilities, efficiency, etc. Top speed on trucks is not an important factor to GM. This along with many other reasons is why they have a top speed limiter.

 

 

 

Here you assume that every other member bought their truck for the same reason I did, and that I have not read your posts. I assure you I have read your posts.

 

 

.........."My statement, as its been from the beginning, is trying to explain why manufactures place speed governors on trucks"

 

 

I am not making assumptions as to why people buy their truck. People buy their vehicles for whatever reason they have. At no point do I say why other members buy their vehicles. I will highlight that below;

 

 

 

.........." I don't care why you purchased your truck, as that reason is a different reason than probably every other member here. I don't think you have been reading my posts at all. "

Here you assume that you know EXACTLY why there are limiters on the trucks

 

lol where am I making an assumption? I will break down that sentence for you here, maybe this is easier for you to understand;

 

"I dont care why you purchased your truck"

 

-I don't know how I can break this down any farther, you have your for buying your truck. I have mine. Everyone has theirs. They might or might not be the same.

 

"...as that reason is different reason than probably every other member here"

 

-Again, you buy your truck for whatever reason. I never said I knew why you bought your truck and I will say it again, I DON'T CARE WHY YOU BOUGHT YOUR TRUCK. Print that out if you need to, or write it on a post-it and put in on your monitor.

 

 

 

I don't know the exact reason there is a limiter, but I do know that you don't either.Period.

 

It doesn't take a genius to figure this out. What kind of bat-shit idea would if be if GM had a top speed limiter of 130mph with tires only rated at 112, or a drive-shaft only balanced to 105mph. They don't do this because all these little things add unnecessary production costs and every dollar counts to them. At the same time this is why items such as the OE tires, brakes, suspension, are perfectly capable of towing and hauling a payload as advertised.

 

Period.

[nadrojcote]

What if they limit the speed in case some idiot gets some aftermarket floor mats stuck under his gas pedal and crashes like what happened to Toyota. Then GM would have to go around cutting the bottom of every trucks pedals off. In the case where your vehicle is speeding up and your not touching the gas having a lower speed limit will reduce the likelihood of a death if an accident occurs.

[Strykers_Inc]

 

Yes, exactly, saving GM. The "$8" was a quick number I gleaned from tirerack and have no idea what the real number is. My point is that any dollar amount multiplied by 1/2 million adds up quickly.

Which the consumer pays for, not GM.

[Strykers_Inc]

This seems to be incredibly hard for you to understand; Not hard to understand at all, I am just repeating what you are saying and pointing out the assumptions.

 

 

Manufacturers ≠ Truck Customer; do you not get this? Is this so hard for you to understand? GM has their reasons for limiting top speed. That is the point. They limit it and that is that. The fact that this is an important factor for you, as you have stated multiple times, is irrelevant to GM. And for the record because you seem to have this confused, top speed ≠ fast, because fast is subjective to each individual.

 

GM does not go out and advertise their pickup trucks at 150, 170mph. In no GM brochure, magazine review, or any other form of medium is a trucks top speed even discussed or brought up as a selling point. You know what is? Durability, pay load, towing capabilities, efficiency, etc. Top speed on trucks is not an important factor to GM. This along with many other reasons is why they have a top speed limiter. Nor do they advertise a Camper shell or Lift Kit or supercharger or should I keep going?

 

 

I am not making assumptions as to why people buy their truck. People buy their vehicles for whatever reason they have. At no point do I say why other members buy their vehicles. I will highlight that below;

 

 

lol where am I making an assumption? I will break down that sentence for you here, maybe this is easier for you to understand;

 

"I dont care why you purchased your truck" And I dont care why you bought your truck. Never even asked if it was in your top 20.

 

-I don't know how I can break this down any farther, you have your for buying your truck. I have mine. Everyone has theirs. They might or might not be the same.

 

"...as that reason is different reason than probably every other member here" - meaning every other person has a different reason from the original reason, so lets say 50% think one way and the other 50% can think every other way

 

-Again, you buy your truck for whatever reason. I never said I knew why you bought your truck and I will say it again, I DON'T CARE WHY YOU BOUGHT YOUR TRUCK. Print that out if you need to, or write it on a post-it and put in on your monitor. And I dont care why you bought your truck. Never even asked if it was in your top 20.

 

 

 

It doesn't take a genius to figure this out. What kind of bat-shit idea would if be if GM had a top speed limiter of 130mph with tires only rated at 112, or a drive-shaft only balanced to 105mph. They don't do this because all these little things add unnecessary production costs and every dollar counts to them. At the same time this is why items such as the OE tires, brakes, suspension, are perfectly capable of towing and hauling a payload as advertised.

 

Dont need a printer, I have no reason to argue or care about anythinig other than the fact your trying to speak as to you are the be all end all defacto knowledge bank as to why GM does what they do. Just so you know, companies regulate the specs by large percentages due to regulations placed on them. A speed of 130 mph on an S rated tire is not a smart thing to do, but I would be safe to bet that you can do it, and it has been done. Balanced to the 105mph, not top speed. Brakes, Suspension, and driveline components are capable of alot more than you give them credit for. If it can tow 5000 lbs at highway speed it is more than capable of doing more than the limiter limits it at. Using your same thought process of liability, why would a tuner allow you to do it if they had any "bat-shit-idea" that it was detrimental to the vehicle. My thought on this is that you will hit the wall of max power before you hit the wall of max tolerance of components. Buick Grand National comes to mind limited to 122mph because of transmission. When the transmission could really handle a heck of alot more.

 

I stated before, I do not know the EXACT reason for GM putting a limiter on their products, and NEITHER do you.

 

 

Period.

 

 

Hennessey HPE650 Supercharged Upgrade

Power:

• 650 bhp @ 5,500 rpm

• 658 lb-ft Torque @ 4,200 rpm

HPE650 Supercharged Upgrade Includes:

• 2.9 Liter Supercharger System

• High Flow Intercooling System

• Stainless Stell Catback Exhaust System

• HPE Engine Management Calibration

• All Necessary Gaskets, Fluids & Hardware

• Professional Installation

• Dyno Tuning & Road Testing

• Serial-Numbered Dash Plaque

• Serial-Numbered Engine Plaque

• Hennessey Exterior Badging

• HPE650 Exterior Badging

• Supercharged Badging

• Hennessey Embroidered Headrests

• 3 Year / 36,000 Mile Limited Warranty

....Nowhere to be found driveshaft or trans or suspension upgrades because stock wasnt enough already....and your out of your Fing mind if you think they reached those numbers with a 100mph limiter in testing.

 

 

 

Period.

 

 

[WendysOrBust]

 

This seems to be incredibly hard for you to understand; Not hard to understand at all, I am just repeating what you are saying and pointing out the assumptions.

 

 

Manufacturers ≠ Truck Customer; do you not get this? Is this so hard for you to understand? GM has their reasons for limiting top speed. That is the point. They limit it and that is that. The fact that this is an important factor for you, as you have stated multiple times, is irrelevant to GM. And for the record because you seem to have this confused, top speed ≠ fast, because fast is subjective to each individual.

 

GM does not go out and advertise their pickup trucks at 150, 170mph. In no GM brochure, magazine review, or any other form of medium is a trucks top speed even discussed or brought up as a selling point. You know what is? Durability, pay load, towing capabilities, efficiency, etc. Top speed on trucks is not an important factor to GM. This along with many other reasons is why they have a top speed limiter. Nor do they advertise a Camper shell or Lift Kit or supercharger or should I keep going?

 

-Holy hell, are you this dense? Aftermarket products? How the hell did we end up there?

 

I am not making assumptions as to why people buy their truck. People buy their vehicles for whatever reason they have. At no point do I say why other members buy their vehicles. I will highlight that below;

 

 

lol where am I making an assumption? I will break down that sentence for you here, maybe this is easier for you to understand;

 

"I dont care why you purchased your truck" And I dont care why you bought your truck. Never even asked if it was in your top 20.

 

-Good, I think you forgot to address the point to which you claimed I was assuming all these things though.

 

-I don't know how I can break this down any farther, you have your for buying your truck. I have mine. Everyone has theirs. They might or might not be the same.

 

"...as that reason is different reason than probably every other member here" - meaning every other person has a different reason from the original reason, so lets say 50% think one way and the other 50% can think every other way

 

-Again ok? Not sure where you are going with this.

 

-Again, you buy your truck for whatever reason. I never said I knew why you bought your truck and I will say it again, I DON'T CARE WHY YOU BOUGHT YOUR TRUCK. Print that out if you need to, or write it on a post-it and put in on your monitor. And I dont care why you bought your truck. Never even asked if it was in your top 20.

 

-Great, we don't care about each other. Got it

 

 

It doesn't take a genius to figure this out. What kind of bat-shit idea would if be if GM had a top speed limiter of 130mph with tires only rated at 112, or a drive-shaft only balanced to 105mph. They don't do this because all these little things add unnecessary production costs and every dollar counts to them. At the same time this is why items such as the OE tires, brakes, suspension, are perfectly capable of towing and hauling a payload as advertised.

 

Dont need a printer, I have no reason to argue or care about anythinig other than the fact your trying to speak as to you are the be all end all defacto knowledge bank as to why GM does what they do.

 

-I'm sorry if you feel as I'm talking down to you. That seems to be a you problem.

 

Just so you know, companies regulate the specs by large percentages due to regulations placed on them. A speed of 130 mph on an S rated tire is not a smart thing to do, but I would be safe to bet that you can do it, and it has been done. Balanced to the 105mph, not top speed. Brakes, Suspension, and driveline components are capable of alot more than you give them credit for.

 

-Again, no one is saying tires will magically disintegrate if you go past their rated speed limit. I've done it and so have many others. See post here. This doesn't change the fact that the OE tires are rated at 112mph. Its like hauling more than what your tires are rated for, can you do it? Yes, its probably past its intended payload but most likely you will be fine. However when you do and something fails the liability of part failure is transferred from the manufacturer to you.

 

If it can tow 5000 lbs at highway speed it is more than capable of doing more than the limiter limits it at. Using your same thought process of liability, why would a tuner allow you to do it if they had any "bat-shit-idea" that it was detrimental to the vehicle.

 

-A aftermarket tuner does not carry the same liability of failure as a manufacturer does, if they did they would warranty any engine failure caused by a tune. And we know no-one does this because aftermarket tunning has its own inherit risk of mechanical failure.

 

My thought on this is that you will hit the wall of max power before you hit the wall of max tolerance of components.

 

-Yes, I agree with this, but at this point you have transferred part failure from the manufacturer to you. The only difference between this and overloading is this is something GM can control, they have no way of being able to limit your payload.

 

I stated before, I do not know the EXACT reason for GM putting a limiter on their products, and NEITHER do you.

 

-See above

Hennessey HPE650 Supercharged Upgrade

Power:

• 650 bhp @ 5,500 rpm

• 658 lb-ft Torque @ 4,200 rpm

HPE650 Supercharged Upgrade Includes:

• 2.9 Liter Supercharger System

• High Flow Intercooling System

• Stainless Stell Catback Exhaust System

• HPE Engine Management Calibration

• All Necessary Gaskets, Fluids & Hardware

• Professional Installation

• Dyno Tuning & Road Testing

• Serial-Numbered Dash Plaque

• Serial-Numbered Engine Plaque

• Hennessey Exterior Badging

• HPE650 Exterior Badging

• Supercharged Badging

• Hennessey Embroidered Headrests

• 3 Year / 36,000 Mile Limited Warranty

....Nowhere to be found driveshaft or trans or suspension upgrades because stock wasnt enough already....and your out of your Fing mind if you think they reached those numbers with a 100mph limiter in testing.

Period.

-OMG YOU SHOULD TOTALLY SEND THIS TO GM AND BE LIKE LOOK GUYS. THERE IS NO REASON FOR A TOP SPEED LIMITER. CAN YOU REMOVE IT PLZ. XOXOXOXO - STRYKER

Period.

Period.

-Period

 

[ghgmi]

Which the consumer pays for, not GM.

 

So no sense in GM managing cost?

 

Unless GM can charge $8 or more per truck, on average, due to the higher speed-rated tire (or sell more trucks), it makes sense for them to ship with the cheaper tire and pocket the difference. (Again, just using "$8" as a made-up example.)

[nadrojcote]

I wonder how OP feels about this thread...

[Strykers_Inc]

WendysOrBust

 

For your information on OE tires. My Tires on my truck right now are OE GM Tires and are rated 130mph and include a GMPP part number.

 

You stated: -Yes, I agree with this, but at this point you have transferred part failure from the manufacturer to you. The only difference between this and overloading is this is something GM can control, they have no way of being able to limit your payload.

 

WRONG. Anything over the posted DOT speed limits liability is you. Thats the point I have been trying to convey to you this entire time. The manufacturers hands are clean once you break the tolerance of the law. Regulations are why safety is imposed for the most part. If GM worrying if the part is going to fail at 101 mph, chances are the part is going to also fail via torque required to pull 5000 lbs. I agreed that tires could play a role in that, but as per the video I posted, those tires on that Hennessey from what I could tell are Goodyear SRA's.

[Strykers_Inc]

I wonder how OP feels about this thread...

Too Funny!

 

 

[Strykers_Inc]

 

So no sense in GM managing cost?

 

Unless GM can charge $8 or more per truck, on average, due to the higher speed-rated tire (or sell more trucks), it makes sense for them to ship with the cheaper tire and pocket the difference. (Again, just using "$8" as a made-up example.)

 

True. But that S rated tire has its benefit since its most likely in higher quantities. Speculation.

 

...and I stand corrected on the Buick Grand National. The limiter was not for the transmission, it was for front end lift at 125mph and its loss of stability beyond that.