BFG ko2 265/70/17 tyre pressure?

[Psydesign Lurker Find all posts View Profile Close Psydesign]

hey guys what tyre pressure should i be running on road? currently 36 PSI as thats what it was when i got it a couple of weeks back,

[sparksy Senior Member Find all posts View Profile Close sparksy]

I run 38. Dont run on what says on tyre placard. If you do the tyres wear out quicker. My 694's are almost ready to be replaced after 90K.

[Rainman Advanced Member Find all posts View Profile Close Rainman]

I generally run 32 on the front and 34 on the back with my 265/75 R16s (95 series) around town and a few extra pounds when loaded up and generally get around 90,000km out of a set with fairly even wear, despite the fact that I generally only rotate them once or twice - mainly due to slackness. A lot seem to run their tyres around 40psi but I find that way too hard.

[Peterpilot Avid PP Poster! Find all posts View Profile Close Peterpilot]

Depends on the weight of your vehicle and how much weight your tyres carry at a given tyre pressure, I generally run 32-36 psi depending on weight. Here is a guide:

http://users.tpg.com.au/klgreen/WK2_...re%20Guide.pdf

[adrian5800 Advanced Member Find all posts View Profile Close adrian5800]

Depends on the weight of your vehicle and how much weight your tyres carry at a given tyre pressure, I generally run 32-36 psi depending on weight. Here is a guide:

http://users.tpg.com.au/klgreen/WK2_...re%20Guide.pdf

I use a similar method, take your vehicle to a weighbridge and weigh the axles individually. Then extrapolate the pressure from the load on each axle from the max pressure of the tyre and load rating. My 265/65R17 KO2s have a max single tyre load of 1400kg each at 80psi. Last time I weighed it, it was 1320kg front and 1360kg rear. From that the calcs work out to be 37.7psi front and 38.9psi rear cold. I also use the same formula for the camper trailer which also use the same tyres. I do the same process when it is loaded up for a trip. These pressures are for bitumen roads and obviously are reduced for gravel/sand/offroad..

The calc I use is =(axle load/2) / (rated load/max pressure)

or for example (1320/2)/(1400/80)=37.7

And yes I have it in a spreadsheet.

[Razorback81 Advanced Member Find all posts View Profile Close Razorback81]

when i got my BFG's the guy at Bob Jane's said that BFG had done extensive testing of the pressures on the prado & pajero and said 36psi was the correct setting

when i had some work done on the car my repco buddy said try your car now, and it drove like it was on rails, i asked what he did and he had raised the pressures to 50 in the front & 55 in the rear
then i went and weighed it (knowing the high weight 3500 he was spot on)

i have done over 30k onthe tyres and they are not showing any abnormal wear


i use this calculator from a van company
http://www.gnschassis.com.au/tyre-pressure-calculator/
same with the van the guy said 40 to 45 so i tried and they looked low, drove on them and pressure went to 59
pumped them up to 55 they went to 64 went to 65 they went to 69
did the calc and they should be 70 (van weighed 2350kg on single axle) ( used BFG alterains KO2 and they were the highest rated tyre i could fit)

[Peterpilot Avid PP Poster! Find all posts View Profile Close Peterpilot]

I also use actual weights, last weighbridge visit mine came in at 1140 kg front and 1380 kg rear

[Razorback81 Advanced Member Find all posts View Profile Close Razorback81]

I also use actual weights, last weighbridge visit mine came in at 1140 kg front and 1380 kg rear

same here
packed it ready for the cape trip full of fuel water gear etc and us then did the tyres to suit
same on the van , just taking off the ball weight