Ouch!! (Tyres)

[mark61]

Being safe would be starting with Conti's figures and then making minor adjustment to suite. Really safe would include fitting a TPMS with a temperature reading, then you know pretty much exactly where you are. TyrePal seems to be the preferred one.

 

[colinm]

So maybe go with 65 on the front and 69 on the back then just to be safe?

If I was a bit concerned by different advice that is the pressures I'd run at, it will give plenty of margin for error.

 

[barryd]

If I was a bit concerned by different advice that is the pressures I'd run at, it will give plenty of margin for error.

As long as I can't risk damaging them early Ill try that. Suck it and see as they say. The friendly garage up the road will probably do it FOC. My pump is shite and I dont trust any of my gauges. Our first trip is just a short one up to Arran for a month so it will be a good testing ground. I want to get it right for the Alps and Pyrenees though.

 

[Geek]

If I have read that chart right assuming about 1800 kg on the front and about 2100 on the back fully loaded thats 50 PSI in the front and 65 PSI on the back. That seems ridiculously low. 5.5 bar or 80psi was supposedly what they are supposed to be but none of the weights within the axle limits on that chart are that unless its over the max 2400kg on the rear.

Still as clear as mud.

65 isn't always ridiculously low
Can't read that little chart on my phone, but the correct pressures for my motorhome are 52psi front, 48psi rear. I generally run them a little higher (54/50) unless checking them in cold weather.

On the road, the pressures increase by 4 to 6psi in any case.

They stay stable if inflated with nitrogen, but I don't have a nitrogen cylinder.

 

[Geek]

So maybe go with 65 on the front and 69 on the back then just to be safe?

Safe from what? Too high a pressure and the grip on the road is reduced. Too low a pressure and there is a danger of overheating and blowout.
That's why you calculate the correct pressure.
More is less safe, less is less safe.

 

[barryd]

Safe from what? Too high a pressure and the grip on the road is reduced. Too low a pressure and there is a danger of overheating and blowout.
That's why you calculate the correct pressure.
More is less safe, less is less safe.

Well they are all at 80 psi at the moment and the road holding and handling is fine but the ride is too harsh. The figures suggested by Conti were based on my weighbridge weights. I added a bit more for maybe extra stuff we might load in but then there are other forces at play as Conti say about temporary overloads so I thought it better to play it safe by decreasing a fair bit what they are now but then upping it from whats on that chart. I'm more concerned about compromising the tyres by going too low. So I figured 65 on the front and 69 on the back might be a good place to start.

 

[Nabsim]

Jeez Barry don't ever buy a trike, I m running the car tyres on the reliant back axle of mine at 10psi

 

[mark61]

Jeez Barry don't ever buy a trike, I m running the car tyres on the reliant back axle of mine at 10psi

Perfect considering the amount of potholes around. Like a comfy sofa.

 

[trevskoda]

Safe from what? Too high a pressure and the grip on the road is reduced. Too low a pressure and there is a danger of overheating and blowout.
That's why you calculate the correct pressure.
More is less safe, less is less safe.

Seems more or less correct, should i or shoudent i but cannot make my mind up.