Reader help: what tyre pressures should I run for my Toyota LC200?
A reader wants help determining the correct tyre pressures for their toyota LandCruiser 200 Series when driving on-road and in sand.
I’ve been using Robert’s excellent 4WD Handbook to help understand my tyre pressures. In Chapters 4,5,6,7 you suggest pressure reductions using the vehicle’s placarded pressures as the starting point. It is a simple concept that is easily remembered.
However, my 200 series LandCruiser has a placarded pressure of 230kpa (about 34psi). After the first set of tyres wore badly, my Toyota dealer said that 40 – 41 psi was the correct highway pressure; and to alter tyre pressures from that starting point. They said the 34psi was a gravel road pressure, reflecting the more typical use for this vehicle.
My question is: which pressure do you mean your readers to start from?
This checking came about because I need lots more sand driving experience and want to find my own suitable tyre pressure. I measured tyre wall height at 40psi (ie 155mm / 100%), then reduced pressure till it was down to 75% (ie 116mm). Air pressure was then 14psi. Tyre looked OK, contact patch was 75% longer, and it seems like a good pressure for my vehicle, load and tyre.
What do you think of this?