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Re:What tyre psi you running???

  • Phattaff
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28 Jul 2020 08:52 #225775 by Phattaff
What tyre psi you running??? was created by Phattaff
Running 235/75/15s not sure what pressure they should be.
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28 Jul 2020 09:31 #225776 by mlines
Replied by mlines on topic What tyre psi you running???
20 psi for me
Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses

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28 Jul 2020 11:16 #225777 by 300bhpton
Replied by 300bhpton on topic What tyre psi you running???
On road, off road, towing, hauling, type of tyre, type of driving?
My 2019 Chiffon Ivory JB74 SZ5 - blog/mods/build thread -let the adventure begin

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  • Lambert
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  • The quickest Jimny in Harrogate...(that I own)
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28 Jul 2020 12:51 #225781 by Lambert
Replied by Lambert on topic What tyre psi you running???
The tyre will have a maximum load at a maximum pressure written on the sidewalls. Either using the maximum axle weights off the vin or actually measuring the weight on each axle you can use maths to work out the pressure from the maximum figures on the tyre.
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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28 Jul 2020 14:10 #225787 by jackonlyjack
Replied by jackonlyjack on topic What tyre psi you running???
22 psi all four 195/80/16 extreme retreads
Same in bfg km2 225/75/16
My Jimny
www.bigjimny.com/index.php/forum?view=topic&catid=8&id=60814

www.youtube.com/channel/UCfJa3cPPDZYGwkWr0rvu8ug

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28 Jul 2020 18:54 #225797 by Busta
Replied by Busta on topic What tyre psi you running???
I run 21psi in 215/75r15s. 19-20psi would seem about right for 235s.

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  • GeorgeC
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28 Jul 2020 19:27 - 28 Jul 2020 19:29 #225802 by GeorgeC
Replied by GeorgeC on topic What tyre psi you running???

Lambert wrote: The tyre will have a maximum load at a maximum pressure written on the side-walls.
Either using the maximum axle weights off the vin or actually measuring the weight on each axle you can use maths to work out the pressure from the maximum figures on the tyre.

Well said Lambert! Also the tyre manufacturer can give you another number than will confirm all the above, its the Static Loaded Radius. I quote from an email from Bridgestone for the stock Gen 4 195 80R 15 Tyre: "Static Loaded Radius = 315mm +6, -10."

For my Jimny I have settled on 22psi for left front & rear and 22.5psi for right front & rear, at 4 degrees C, no TPMS. I have yet to measure the Static Loaded Radius at these pressures.
Last edit: 28 Jul 2020 19:29 by GeorgeC.

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  • Phattaff
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29 Jul 2020 08:49 #225815 by Phattaff
Replied by Phattaff on topic What tyre psi you running???
Cheers all for your input. Some very tech answers there, as I'm a bit stupid i will go for 21 front and 22 rear

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29 Jul 2020 10:08 #225818 by Roger Fairclough
Replied by Roger Fairclough on topic What tyre psi you running???
To GeorgeC

Why are you running different tyre pressures left to right?

Roger

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29 Jul 2020 10:28 #225819 by saxj
Replied by saxj on topic What tyre psi you running???

mlines wrote: 20 psi for me


I also run 20PSI on road. 9 off-road

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  • GeorgeC
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29 Jul 2020 18:54 #225833 by GeorgeC
Replied by GeorgeC on topic What tyre psi you running???

Roger Fairclough wrote: To GeorgeC: Why are you running different tyre pressures left to right? Roger

A good question. There is more weight over the right side of the car than the left with only the driver + fuel. This will be confirmed later when I measure the Static Loaded Radius of all four wheels.

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30 Jul 2020 20:38 #225873 by Jezz
Replied by Jezz on topic What tyre psi you running???
About 6 or 7 psi for me.
It's been fettled just a tad.

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