Check your tire pressure!!!

[ryanjl]

Instead of 33 per window sticker, you can have up to 37-38psi because of bigger/heavier tires. Dealer recommended to me after I got the tire presure warning light lit up on the panel with 44psi for 3 weeks after ko3 installed. 38 psi helps soften driving/ floating

This does not make sense. Bigger and heavier tires to not inherently require more PSI. If anything, they may require less air pressure if they are E-Rated tires with thicker sidewalls.

The only way to know for sure what PSI to run is to do a chalk test on the tires. Googling "chalk test tires" will turn up a ton of tutorials.

 

[ultane]

This does not make sense. Bigger and heavier tires to not inherently require more PSI. If anything, they may require less air pressure if they are E-Rated tires with thicker sidewalls.

The only way to know for sure what PSI to run is to do a chalk test on the tires. Googling "chalk test tires" will turn up a ton of tutorials.

If you run E rated tires, below their recommended, i.e. required, PSI, you will cause premature, and probably catostrophic tire failure. Period.

 

[ryanjl]

If you run E rated tires, below their recommended, i.e. required, PSI, you will cause premature, and probably catostrophic tire failure. Period.

You serious? There is no "recommended, i.e. required PSI" for an E-rated tire. It's entirely dependent on the vehicle weight and load, which is obviously different for each vehicle.

Are you thinking of the "maximum psi?" Because you should only be running the maximum psi if you are running near the maximum weight the tire is rated to carry.

As I stated above, the chalk test reveals the best psi to run on a specific vehicle. "Period."

 

[Buckfever]

You serious? There is no "recommended, i.e. required PSI" for an E-rated tire. It's entirely dependent on the vehicle weight and load, which is obviously different for each vehicle.

Are you thinking of the "maximum psi?" Because you should only be running the maximum psi if you are running near the maximum weight the tire is rated to carry.

As I stated above, the chalk test reveals the best psi to run on a specific vehicle. "Period."

In order to get the same load with the E rated tires they will have to be run at a higher PSI.

 

[ryanjl]

In order to get the same load with the E rated tires they will have to be run at a higher PSI.

I'll concede that e-rated tires probably need to be run at a higher PSI than the stock tires, but there is no published "recommended psi" for any tire that's different than the exact tire the vehicle came with.

Ultimately, the tire's wear pattern dictates the proper psi, and the best way to determine how the wear pattern dictates the proper psi is the chalk test.

 

[bobLC]

You serious? There is no "recommended, i.e. required PSI" for an E-rated tire. It's entirely dependent on the vehicle weight and load, which is obviously different for each vehicle.

Are you thinking of the "maximum psi?" Because you should only be running the maximum psi if you are running near the maximum weight the tire is rated to carry.

As I stated above, the chalk test reveals the best psi to run on a specific vehicle. "Period."

Agreed. Also, you said load

 

[ET2041]

Seems a lot of dealers are missing this step on the PDI. The tires come pumped up for shipping because they’re strapping the trucks down and fully compressing the suspension.

If you’ve gone to a heavier load range tire than stock please do not follow the door card anymore. I have Load range E KO3’s and I was told by BGF to run them between 45-50psi. Running them sub 40 you’re putting too much heat into those sidewalls and risking premature failure.

I know it's an old post but I took delivery on April 2nd and my tires were all at 53 or 52 PSI. I couldn't believe it. I'm running them now at 37-38

 

[AZ RAT]

Same here, my LC was at 50 psi out the dealership 2 weeks ago.

 

[jcdeng]

Interesting, mine came in with 37 psi, (reading from the app).

 

[LC in the LOU]

My michelin ltx’s were high 40’s and manual calls for 31 33 psi. Drove so much better when i dropped down to 33. My spare is still at 55 psi lol

Same here, and I lowered to 34 and the ride improved.

One caution about the spare pressure. Tires all lose pressure over time. I left my spare at 51. Why? On a previous vehicle I got a flat and pulled my spare, after about 2 years. PSI was down to single digits. Not the end of the world if you have an inflator, but if you are on the side of a highway, bad neighborhood, in bad weather etc. it might save you 5 minutes or more to just change it fast and lower the pressure later.

 

[Isaac]

Was 55 at the time of purchase. Decreased to a cold 33. Has evened out to 35-37. Much smoother ride.

Spare is still 55. I’ll probably lower that if I ever need to use the spare.

 

[chris_in_phx]

Same here, and I lowered to 34 and the ride improved.

One caution about the spare pressure. Tires all lose pressure over time. I left my spare at 51. Why? On a previous vehicle I got a flat and pulled my spare, after about 2 years. PSI was down to single digits. Not the end of the world if you have an inflator, but if you are on the side of a highway, bad neighborhood, in bad weather etc. it might save you 5 minutes or more to just change it fast and lower the pressure later.

Yeah for sure. I left it high so i can air it down if needed. I do carry a VIAIR compressor and tire gauge with me on road trips too.

 

[Viktorv1961]

All tires were at 50psi exactly at dealer's lot. Lowered to 36 psi at home. I wonder why almost all LCs come with 50-55 psi tire pressure?

 

[ultane]

All tires were at 50psi exactly at dealer's lot. Lowered to 36 psi at home. I wonder why almost all LCs come with 50-55 psi tire pressure?

Some people say to prevent flat spots from forming on the long ride over on the ships from Japan.

 

[Sugarloafer80]

First thing you do the day you drive ANY new vehicle home is check lug nuts and tire pressures.............EVERY CAR! Then sit down and read the manual!
100% correct about shipping them at max pressures. been done for years. Classic sign of a shoddy dealer predelivery inspection. I have been known to have a track gauge in hand at delivery and I tell them this is test #1 !

 

[basicxj]

Jacking up tire pressures for new/used vehicles is sadly pretty standard for car dealers, true if there was a boat ride involved in getting to the car lot or not. I have taken delivery of vehicles foreign and domestic with tire pressures in the high 40’s.

One dealership service department (Jeep) would inflate tires 44-46 psi during normal service in spite of being specifically told to leave them alone. They always strived for four different tire pressures too. I’d have to let them sit overnight and drop each corner down to 36 psi every single time. It isn’t just about the sticker on the door jamb or the max. inflation number on the sidewall- a chalk test will tell you what you need to know.

 

[Sugarloafer80]

Sort of. Pyrometer far better in the 21st century TBH