I have 4 door with 35" BFG KM2 on AEV Beadlocks. What is the best tire pressure for hwy/street driving. The shop that installed recommended 40psi. Is that to high?

 

Yep, Chalk test is the best way to fly.

 

I run 28 as well.

 

35 Toyo MT's here and 28 is my best ride number

 

Thanks for the info. I guess i need to air down.

 

Yep, 30psi in mine. They had 40psi in them at one time and the ride was much more harsh and I wasn't getting a full contact patch either.

 

Yep, chalk test and I bet you end up around 30psi or less. It's gonna ride SO much better!!!

 

I have the same 35x12.5x17 BFG KM2s on mine. Shop told me they set them at 32-34, but after driving a week (500 miles) and seeing the outside edge nipples still on there (i.e. edges not riding on ground b/c overinflated), I checked the pressure and it was at 38-40 range.

I dropped them down to 32psi and it improved the right quality (wasn't actually that bad at 40psi IMO even) and appears I am getting a more correct footprint. May drop down to 30psi even...

 

Could some one explain how to do a chalk test properly. I've never heard of this before.

 

Check the link that the Planman listed. It has an exact "how-to" on doing a chalk test.