2017 F150 4x4 with leveling kit on 33" tires sever bump steer even on the frwy @ 70 or so miles MPH. If I run the tires @ 38 psi it's not nearly as bad as running them @ 50 psi. Tires are Falken Wildpeak 33x12.5 x20 A buddy of mine said installing a rear stabilizer will help I don't think so any idea's?? Rick

 

I think 38 PSI is a lot of air in a 33" tire. With the IFS front suspension the F150 has there shouldn't be any bump steer if tire balance is good and alignment is correct.

 

I noticed the same thing, from my understanding it has a lot to do with the leveling kit dropping everything down. I am in the process of ordering the Bilstein 5100 leveling structs and rear shocks, many have indicated the front struts help alleviate the bump steer all together as they do not drop everything as much as a leveling puck. Will get a little stiffer front suspension but better overall performance.

 

the width of your tire has more to do with bump steer than anything even more so if you are running wider aftermarket wheels. Plus 50psi is entirely too much IMO

 

This:

https://www.f150forum.com/f118/wheel...pplers-420608/

 

I've ran standard levels for years and several f-150s with no bump steer. Air down some, and ensure everything is aligned correctly. Typically a 2.5 or smaller will not ride much different than stock.

 

I have a set of Raptor rear shocks arriving today I'll get those installed tonight & see if that helps even a little bit, if the shocks don't help it will still look cool. Anybody install a rear stabilizer bar kit from Hellwig??

 

That is one of the best mods you can do! Regarding the raptor shocks, I have heard they don't help with handling due to the vehicle weight differences, but I personally have not tried it.

 

 

You may be using the term bump steer incorrectly. Bump steer is strictly a function of suspension and steering geometry. Bump steer should be pretty minimal from the factory. Maybe you are experiencing tramlining with wider tires? Does the truck seem to be pulling left or right as you drive, or is the steering pulling to one side when you go over pumps? Factory wheels or aftermarket with different backspacing?