I run mine at 35/ 40 for full load on 235/85/16; however I have never really thought to check pressures when cold only when hot. LR manual says when cold and pressure is then 3lb more at working temp.
Question is do I inflate to 35/ 40 when cold or make allowance and run them at this when hot ie top up to 3 below when checking cold.
Tia John H
Hot or cold, doesn't really matter. Just so long as the left side matches the right, tyre pressures on Land Rovers with large tyres aren't critical and can easily be up or down 3psi without you noticing.
Recently I thought a rear tyre (235/85R16) on my S3 looked a little low. When I checked, it read 15psi.
Tyre pressures are always specified cold. How much they gain when hot depends on conditions, whether they have tubes, driving speed and what the pressure was to start with. With high speeds in temperatures over 40C, and pressure low to start with, pressure gains of
10-15 would be possible, and tyre failure imminent even though the pressure was somewhere near recommended when hot. JD
Bad form, etc, but JD reminded me...
If you're going to be driving your vehicle at the maximum speed and load for those tyres then you need to be checking your tyre pressures when cold, as per manufacturer's instructions. DO NOT, under these circumstances, CHECK THEM WHEN HOT.
*Generally*, (ie: on the school/shopping run) such measures are overkill.Take my FZS600 motorbike tyres for example - in my normal riding, which is classed as "sedate" and *WAY* below the rated maximum for the tyres, they are inflated to "About Right(tm)" but if I were to go on a track day and push these tyres to their limit you can be sure I'd have the pressures spot-on.
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