I now have metzlers and I can find the air presure recomendations for the rear 150/70/18 40 psi solo 42psi two up but I cant seem to find the front recomendations 120/70/21 does anyone know what the front should be? max psi is 42 should I run that?

 

I run mine at 36 psi front, and 38 psi rear.

 

I run around 40-42 on the front 21x3.5 and 46-48 on the rear 18x4.25. I will say if you run the front closer to 40 or a bit under you get quite a bit softer ride, but not as quick. As for the rear, I hadn't checked mine in a while and starting noticing a little break loose with it Friday night. I checked the air and it was about 38. I filled it back up and everything tightened up. I do reccomend checking air pressure often on the Metzelers.

 

Air is important on the metzlers as I have been told by many I think im going to run 40/42 my rear is 42psi max so is my front and see how it handles.