8.00x6.00 Tyre Pressure?

I have this friend (No! really, despite what some may believe), a computer-impaired Luddite, who has just transitioned from 8.00x4.00's to 8.00x6.00 tyres, utilising Aircraft Specialty (f.k.a. McCreary) Airhawks. These have a somewhat rounded profile.

My guess is he's running 75% coarse tarmac, 25% grass/gravel/unpaved, but I could be wrong.

What is the optimum tyre pressure? I'm thinking ~15-18psig here, but that's based on too much 8.50x6.00 experience in the dirt.

Thanks for your help.

Cubscout

I run 800-6's right now, and about 95% pavement and the rest turf while Im stuck in the DC area for right now. I've found 18 psi gives a good amount of give and keeps a fairly flat patch in contact. No bouncing back up when I land a foot too high. Makes it good enough for getting in and out of the hangar too.

I run 800-6s on my 7GCBC and also find that 17-18lbs works well.

For the record the Supercub POH called for:

Main tires 22 PSI

Maule tail or equal :

Tail wheel upto 55 PSI(this is what maule told me)

But I aggree that 18 or less is the better pressure and a little less squirly on the pavement.

We converted our Cub from 4's to 6's aprox. 20 years ago. 80% is on grass or farm fields. As long as someone helps push it out of the hangar 13-14 lbs. really cuts down on the "hopping" But it can get interesting at those pressures on asphalt in a cross wind. I run 18 lbs. when going asphalt . . or staying on reg. grass strips. Plus it pushes alot better on our dirt hangar floor and grass out front. 18 lbs. works better in snow . . . . until I have to got to skis. I am running the same brand/model as your friend and have no complaints. Larry Ciszak

Brilliant that I found this post and thanks to the OPs!! I have the standard Piper wheels on my PA-12 and took it onto tarmac/pavement for the first time yesterday, no drama and all worked as advertised and I could really feel the give in the tyres, I'm at about 18psi so sounds like I'm about right and the air cushioned ride feeling is what's intended

We try to run 24 psi on 8:00x4s, exclusively on pavement. They drift down all by themselves, and with student work anything below about 15 can be disastrous. A quick application of brake to stay out of the weeds and next time around you have a flat.

At government supported airports a flat is a big deal. One airport manager wanted an accident report for a flat nosewheel on a taxiway. We used to have a guy at MYF who wanted to call a forklift for a flat. Yow!