Ok, so I'm looking at a set of 32x10x16 Mud Claws. I will be running them on the factory 16 inch tires which are, if I remember correctly, 8 or 8.5 inches wide. I was wondering how low I can safely deflate them for use on sand or rocks without popping a bead? I've heard of people saying that most tires are usually safe down to 12 or 15 psi, but I cant find anything about these specific tires. I'll probably be running with my truck loaded down pretty heavy. Probably around 6000-6500 lbs. Thanks everybody!

Edit: I've since changed my #1 tire choice to a set of 10 ply 265/75r16 Cooper Discovery A/Ts.

 

Two very different strata. On sand you will probably get away with circa 50% reduction in pressure, on rocks, hmmm, I honestly don't know. Dusty or a rock crawler offroader would be better qualified to answer that. If you could indicate the recommended normal pressure it may give a starting point.

All I can say is racing slicks, wide ones at that, run on 10-15psi dependent on road surface and ambient temperatures without popping off the beads at serious centrifugal G's but this is on very smooth and grippy tarmac. On sand with a heavy load on solely soft sand I would reckon circa 12-18psi but I am not that confident to be too specific. It's a suck it and see scenario to me. Google sand tyres and pressures for some ideas.

This gives some ideas for sand driving in 4x4's.

4WD Tyre Pressure for Sand

PS. On reflection, I have run my Pajero 4x4 with Enduro AT's which are 31 10.5 R15 at 15psi in mud without any issues. I believe I could have reduced that comfortably to 12psi but I'm unsure of the rock problems and the chances of damaging the rim beads.

 

Heavily loaded and no beadlocks, I'd keep it around 25psi.

 

Ok, sounds good. I typically run at around 45-50psi, but I'll be changing tires soon so I'm not exactly sure. Whatever they say on the sidewall. Haha

Thanks for the info!

 

That's higher than I expected, I'm glad I asked. Question: this may be stupid, but what is the possibility of having bead locks retrofitted to the stock alloys?

 

I drop below 20, and I look flatter than I like.

Face it, we drive heavy pigs.

The Sammi I wheel with runs 3 psi in his 32's, and he looks like 40 psi, observing it.

(on both my Swampers, and my Mastercrafts, I was disillusioned below 20 psi....)

 

Re lowest pressures, it's all about maximum footprint per tire vs lowest air pressures. Obviously there is a ratio and going lower doesn't potentially achieve anything especially a larger tire footprint except creating greater drag and potentially spinning the rim in the tire. As for retro fitting a bead clamp, they need to be sealed airtight with rubber washers or inserts in the rim and I've never seen this dome as a retro on tubeless tires. Early motorcycles had bead clamps but not in recent years. In fact I've never seen a bead clamp used in the past 30+ years on modern tires and rims.

 

So essentially just play with it and see what works. Will do.

I figured that retrofitting the bead clamps would be pretty complicated, but you never know if you don't ask.

Thanks!