Tire pressure
Thread Starter
|
5th Wheeling
Joined: Dec 2004
Posts: 46
Likes: 1
Tire pressure
Hello everyone, it’s been awhile since I have posted on here.
My wife and I just traded in our 2013 ecoboost super crew with 125,000 miles roughly on it for a new to us 2017 super crew with a 5.0 and only 45,000 on it. Now the 2013 had a 6 inch lift with 35s. The 2017 has a brand new 6 inch lift with brand new Mickey Thompson Baja Legends MTZ tires. When driving it at a low speed like pulling out of the driveway and turning there is a definite roughness. The tire pressure were at 55 psi, which is the cold psi on the door jamb sticker. I lowered them to 38psi and the roughness while turning slowly is no as prominent but I noticed the outer edges on the fronts are a bit rough now. On the 2013 we had Khumo At55 set at 38 psi and there was no issues. Now I know they are two different type of tires and the Mickey Thompson are a more aggressive tread. I am just trying to figure out a good tire pressure to run them on the street.
thank you
My wife and I just traded in our 2013 ecoboost super crew with 125,000 miles roughly on it for a new to us 2017 super crew with a 5.0 and only 45,000 on it. Now the 2013 had a 6 inch lift with 35s. The 2017 has a brand new 6 inch lift with brand new Mickey Thompson Baja Legends MTZ tires. When driving it at a low speed like pulling out of the driveway and turning there is a definite roughness. The tire pressure were at 55 psi, which is the cold psi on the door jamb sticker. I lowered them to 38psi and the roughness while turning slowly is no as prominent but I noticed the outer edges on the fronts are a bit rough now. On the 2013 we had Khumo At55 set at 38 psi and there was no issues. Now I know they are two different type of tires and the Mickey Thompson are a more aggressive tread. I am just trying to figure out a good tire pressure to run them on the street.
thank you
Moderator
Joined: May 2005
Posts: 8,232
Likes: 1,248
From: San Antonio, TX
What wheel size and load range? A higher load range and a larger wheel will always ride more rough. Air them down to about 33 PSI. My truck has 315/70/17 (nearly 35s) BFG ATs, but load range C. And the ride is good at 35 PSI. Before that I had load range E tires and the ride was rough, even at lower air pressures. My wife always hated riding in my truck until I switched to the C rated tires.
You you didn't say which wheel size you have. 20s will always ride rougher than 17 or 18s due to the shorter side wall, and the extra weight of the larger wheels. Plus the 20" MTZ is a load range F, which is cray, and that tire is 70 lbs. You also chose a very aggressive tread pattern, and AT will always ride better than an MT. In a 35" tire, choose load range C tire for the best ride. No F150, unless it's a Heavy Duty Payload Package, will ever come from the factory with E rated tires. And even then, most will never use the truck to that extent.
You you didn't say which wheel size you have. 20s will always ride rougher than 17 or 18s due to the shorter side wall, and the extra weight of the larger wheels. Plus the 20" MTZ is a load range F, which is cray, and that tire is 70 lbs. You also chose a very aggressive tread pattern, and AT will always ride better than an MT. In a 35" tire, choose load range C tire for the best ride. No F150, unless it's a Heavy Duty Payload Package, will ever come from the factory with E rated tires. And even then, most will never use the truck to that extent.
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
Forgive me for asking, Are the tires scrubbing when you turn?
I have 2" lift. with big rims and tires(forget what size, not crazy). And it is super close. Even worse in the winter with snow/ice built up. Even if i had a 4" lift they would still be close -scrub, Especially if the rims have an offset.
I run 35psi. IF i ran 55 no way would i keep the back end under control skipping over chatter bumps like a bridge. All aluminum truck don't weigh much
I have 2" lift. with big rims and tires(forget what size, not crazy). And it is super close. Even worse in the winter with snow/ice built up. Even if i had a 4" lift they would still be close -scrub, Especially if the rims have an offset.
I run 35psi. IF i ran 55 no way would i keep the back end under control skipping over chatter bumps like a bridge. All aluminum truck don't weigh much
Trending Topics
Thread Starter
|
5th Wheeling
Joined: Dec 2004
Posts: 46
Likes: 1
Finally was able to get some time yesterday to do the “chalk test” and it made a big difference. Front tires are at 38psi and rears are 37psi per the TPMS on the dash menu. I adjusted using an electronic tire pressure The dash is showing a psi higher than what the tire pressure gauge reads. The ride is a lot smoother now and a lot better when turning at a low speed. I will give it a few days and do the test again and see if need to make adjustments.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post
crosbo
1999 - 2003 7.3L Power Stroke Diesel
8
Jun 27, 2009 01:07 AM
s.squared-39
Brakes, Steering, Suspension, Tires, & Wheels
1
Nov 19, 2007 09:20 AM
BigBad89Ford
Brakes, Steering, Suspension, Tires, & Wheels
1
Nov 4, 2001 11:35 AM