Good Sam Club Open Roads Forum: Tow Vehicles: Lowering TV tire pressures
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tow Vehicles

Open Roads Forum  >  Tow Vehicles

 > Lowering TV tire pressures

Reply to Topic  |  Subscribe  |  Print Page  |  Post New Topic  | 
Page of 12  
Prev  |  Next
Bert Ackerman

Palm Beach

Full Member

Joined: 08/15/2019

View Profile



Posted: 10/07/19 01:08pm Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

Bert Ackerman wrote:

Cummins12V98 wrote:



Not sure what NASCAR has to do with the subject.


You should be sure what Nascar has to do with it, because to get 100K from BFG's and 120K from Michelin's they had to be matched perfect and staggered special.

Cummins12V98 wrote:



My 98 4x4 with 3rd gen tires and wheels I ran 72 front 35-40 rear unloaded. I would get 100k BFG's and 120K Michelins.



I used inflation charts, rotated about 15k and did a CHIT load of Freeway Commuting. Sometimes it felt like NASCAR. [emoticon]


What state?

Cummins12V98

on the road

Senior Member

Joined: 06/03/2012

View Profile


Offline
Posted: 10/07/19 04:04pm Link  |  Quote  |  Print  |  Notify Moderator

NW WA


2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

wilber1

Abbotsford B.C.

Senior Member

Joined: 12/16/2002

View Profile



Posted: 10/08/19 11:32am Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

wilber1 wrote:

Cummins12V98 wrote:

" If you tailor your pressures for your actual load, you are running your tires at their maximum because that is what those tables mean. They are not recommended pressures, they are the maximum load the tire can handle at that pressure."

If you contact GY Tech they will tell you it's fine to use those numbers but to also add 5psi to what the chart dictates.


They are just giving a fudge factor in case you are out on your weights. Goodyear doesn’t know what application the tire is being used for, they are just giving maximum weights for specific pressures. Do you think NASCAR uses tire load charts or do they use the optimum pressures to give the best performance for their particular vehicle? Vehicle manufactures specify pressures that give what they consider to be the best compromise between load capacity, wear, handling, braking and ride for that particular vehicle. Not all vehicles using the same tire will use the same recommended pressures for that very reason.


Yes they do add 5psi because the load can change going down the road. Follow the chart with proper inflation based on load and the tire will wear even, better ride and stopping plain and simple.

Not sure what NASCAR has to do with the subject.


Load charts are about load, not wear. You can have two different vehicles, weighing the same using the same tires that will need very different pressures to give optimum performance because they are very different in other ways and uses. The tire manufacturer doesn’t know how the tire will be used in every case, only how much weight it can support at a given pressure.


"Never trust a man who has not a single redeeming vice" WSC

2011 RAM 3500 SRW
2015 Grand Design Reflection 303RLS

RoyJ

Vancouver, BC

Senior Member

Joined: 10/19/2006

View Profile


Offline
Posted: 10/08/19 12:13pm Link  |  Quote  |  Print  |  Notify Moderator

wilber1 wrote:

Load charts are about load, not wear. You can have two different vehicles, weighing the same using the same tires that will need very different pressures to give optimum performance because they are very different in other ways and uses. The tire manufacturer doesn’t know how the tire will be used in every case, only how much weight it can support at a given pressure.


For a given class of tire (Class 3 - 5 trucks), how much can the intended use differ? I'd imagine A Ram 3500, vs F450, vs Silverado 3500, all towing a 30k horse trailer, or carrying 5k lbs of cement in bed, would put very similar loads on a tire - mostly vertical.

NASCAR is a whole new extreme, where a 3000 lbs car can weigh 10,000 lbs on a steep enough embankment, and generate over 7000 lbs laterally. Therefore the tire loads are significantly different than say, a street going Camry.

noteven

Turtle Island

Senior Member

Joined: 02/13/2011

View Profile



Posted: 10/08/19 12:43pm Link  |  Quote  |  Print  |  Notify Moderator

Toyota is pretty big in NASCAR.

Toyota is bad mouthed all the time on the rv.net.

Therefore NASCAR does not apply here.

NASCAR should have a street stock pickup truck road course series or whatever they call road course racing - where you have to run MAX inflation tire pressure.

Grit dog

Black Diamond, WA

Senior Member

Joined: 05/06/2013

View Profile


Offline
Posted: 10/08/19 01:24pm Link  |  Quote  |  Print  |  Notify Moderator

noteven wrote:

Toyota is pretty big in NASCAR.

Toyota is bad mouthed all the time on the rv.net.

Therefore NASCAR does not apply here.

NASCAR should have a street stock pickup truck road course series or whatever they call road course racing - where you have to run MAX inflation tire pressure.


That’s what I’m talking about!


"Yes Sir, Oct 10 1888, Those poor school children froze to death in their tracks. They did not even find them until Spring. Especially hard hit were the ones who had to trek uphill to school both ways, with no shoes." -Bert A.

Grit dog

Black Diamond, WA

Senior Member

Joined: 05/06/2013

View Profile


Offline
Posted: 10/08/19 01:25pm Link  |  Quote  |  Print  |  Notify Moderator

Wilber1. I’ve lost which side of the fence you’re on here buddy. And suspect you may have too....

Grit dog

Black Diamond, WA

Senior Member

Joined: 05/06/2013

View Profile


Offline
Posted: 10/08/19 01:26pm Link  |  Quote  |  Print  |  Notify Moderator

To be more understanding, this is a foreign concept to MANY. If it wasn’t, cars wouldn’t need door placards telling you what to do and hair dryers wouldn’t need warnings to not use them in the bath tub....

BenK

SF BayArea

Senior Member

Joined: 04/18/2002

View Profile



Posted: 10/08/19 01:41pm Link  |  Quote  |  Print  |  Notify Moderator

The Laws of Physics are foreign things to many...and is an ever evolving thing...like the new theories are proving Einstein's theories that nothing can travel faster than the speed of light


Back down here on earthen soil...tire inflation depends on many, many attributes and there is no one size fits all...

But, since many do not understand...and we are in a most sue happy society....the OEM's has to CYA with labels (molded in, stickers, etc) that in court provides a basis for defense...

Those labels typically reference maximums and if you go lower...YOU have to re-engineer


-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...

Cummins12V98

on the road

Senior Member

Joined: 06/03/2012

View Profile


Offline
Posted: 10/08/19 03:31pm Link  |  Quote  |  Print  |  Notify Moderator

wilber1 wrote:

Cummins12V98 wrote:

wilber1 wrote:

Cummins12V98 wrote:

" If you tailor your pressures for your actual load, you are running your tires at their maximum because that is what those tables mean. They are not recommended pressures, they are the maximum load the tire can handle at that pressure."

If you contact GY Tech they will tell you it's fine to use those numbers but to also add 5psi to what the chart dictates.


They are just giving a fudge factor in case you are out on your weights. Goodyear doesn’t know what application the tire is being used for, they are just giving maximum weights for specific pressures. Do you think NASCAR uses tire load charts or do they use the optimum pressures to give the best performance for their particular vehicle? Vehicle manufactures specify pressures that give what they consider to be the best compromise between load capacity, wear, handling, braking and ride for that particular vehicle. Not all vehicles using the same tire will use the same recommended pressures for that very reason.


Yes they do add 5psi because the load can change going down the road. Follow the chart with proper inflation based on load and the tire will wear even, better ride and stopping plain and simple.

Not sure what NASCAR has to do with the subject.


Load charts are about load, not wear. You can have two different vehicles, weighing the same using the same tires that will need very different pressures to give optimum performance because they are very different in other ways and uses. The tire manufacturer doesn’t know how the tire will be used in every case, only how much weight it can support at a given pressure.


Have you ever gotten 80, 100 and 120 out of a set of tires? The formula works! I add 10psi to the fronts because of edge wear turning and 5 to the rears.

Contact patch for best braking tread wear and ride ALL are best at proper inflation using the weight/inflation charts. I learned a lot talking to GY tech on this subject years ago.

Reply to Topic  |  Subscribe  |  Print Page  |  Post New Topic  | 
Page of 12  
Prev  |  Next

Open Roads Forum  >  Tow Vehicles

 > Lowering TV tire pressures
Search:   Advanced Search

Search only in Tow Vehicles


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.