Re:Tyre Pressure on Gen4 w BFG K02 - still a bit confused

Hi Guys,

I am still a bit confused about the ideal tyre pressure on my Gen4 with 215/70/15 BF Goodrich K02s...

On Stock 195/80/15s : 1.8 Bar front and 1.9 bar rear (26 / 27.5 psi)

Now working from this, the pressure should probably be lower: ??
Are these assumptions correct?
The 215/70s are about the same diameter, but wider which equals more air, meaning lower pressure?
The BFG tyres have a heavier construction and what looks like much heavier sidewalls, also meaning lower pressure?

From my research on the forum there seems to be quite a range for the PSI. Some suggestions I got:

(Just about all are lower than the suggestion for the stock 195/80s)

User1 - 1.65 Bar (24 psi)
User2 - 1.6 front 1.8 rear (23/26 psi)
User3 - 1.4 (20 psi)
User4 - 1.7 (25 psi)
User5 - 1.6 (23 psi)
User6 - 1.6 front 1.8 rear (23/26 psi)
User6 - 1.65 front 1.85 rear (24/27 psi)

Looks like the sweet spot is around 1.65?

I am looking for a basic all round tyre pressure meeting the following requirements:

• Important: Wont wear out or overheat tyre ensuring longevity
• Important: Rim wont bottom out over speed bump or potholes
• Provides a comfortable reasonably cushioned ride on tar

Long answer.
All tyres have a maximum load at a given pressure written on the side wall. This information can be used to determine the appropriate pressure of the tyre for the maximum weight of the vehicle as provided by the axle weights on the vin plate. Alternatively if you are able to weigh your Jimny accurately you can calculate the pressure for as used weight. It requires some simple mathematics to determine the pressure the tyre will need to support 1 kg and multiplying that by half the axle weight.

Short answer. 22 to 23 psi will be fine for general use and then go lower depending on the off road conditions.

As a base line setting l would suggest 26psi front and rear.

Just to confuse you more i would go with 20psi all round

I found 24psi all round gave the right mix of sidewall rigidity and cushioning on my gen3 when using 215 KO2's.....

sniper

I'm sure this has been discussed on here before but doesn't reducing pressures below about 24psi mean you have to live with the constant tpms warning?