Tyre Sizes - Rough Guide Thread
- KavishKoomar
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Also, bearing in mind Jimny's are really bouncy...
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Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
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- KavishKoomar
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11/60 wrote: All tyres will have a maximum weight at a given pressure written on the side. Your vin tag will have maximum weight of each axle. Using mathematics you can get the correct pressure for the imposed load on each tyre. Alternatively you can do the chalk test where you put a line of chalk across the width of the tyre and drive froward gently to see how much chalk is left on the tyre.
Yeah but the tag is for the standard tyre size... But I recon the chalk test might be a good option.
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Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!
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As far as I know, generally the larger the tyre is (on a same vehicle), less air pressure is needed for the same effect.
Reasons: the tyre itself is larger (stronger), the contact surface with the ground is larger, and more air is inside anyway (larger internal tyre capacity).
Theoretically, the pressure should be reduced by the same percentage by which the internal capacity of the tyre has increased (the goal is to have the same amount of air inside as with the stock tyres). Since the tyre is similar to a torus (geometrical shape), you'll need some good geometrical math skills to do an exact equation.
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I made a comprehensive table of all "interesting" tyre sizes for Jimnys.
The table contains mathematical calculations, as well as various data and comments.
The table can also be used for Samurais.
Here is the published table:
docs.google.com/spreadsheets/d/1qwxmEIQ9...ml?gid=0&single=true
I included the link to this table in my article in BigJimniy wiki:
www.bigjimny.com/mediawiki/index.php/Imp...ain_use#1._Tyre_size
I compiled the table to the best of my knowledge and assumptions.
I invite everyone to contribute to fill the missing pieces in that table, or to correct existing ones.
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