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post #21 of 50 (permalink) Old 04-14-2005, 09:55 PM
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i just reread this post... now for my parada spec II tires 225/40/18 with a load index of 92

On my tire it says something like... don't exceed 40psi and something about "bead" I'm sorry I can't quote exactly, but it has this warning on it.

So, if i were to inflate to 38 psi... isn't that getting kinda close to that 40psi max??? especially when my tires heat up? I know you've answered a lot of my questions already, but its a tricky subject and i just want to be safe on the road.

Many many thanks.


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post #22 of 50 (permalink) Old 04-14-2005, 10:18 PM
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So is 215/40/17, 7" with a load rating of 87, still a no! no! even if you increase the tire pressure to 40 psi?

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post #23 of 50 (permalink) Old 04-14-2005, 10:18 PM Thread Starter
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The warning is actually for the tire installer not to exceed 40 psi to seat the beads. Many tires have max air pressures above 40 psi, but for seating the beads, the tire could potentially explode. There is much less risk once the beads are seated. Your Paradas should have 44 psi max, so 38 is well under the max.

Also consider that the air chamber in the 18 inch tire is smaller than the 17 inch and the higher air pressure is needed to maintain the same load characteristics as original equipment. The tires are designed to hold the extra air. Better to be a little overinflated than underinflated.

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post #24 of 50 (permalink) Old 04-15-2005, 07:33 AM
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It&#39;s not unheard of to put the tires beyond 50psi for autocross- well beyond convention. Of course, autocross courses don&#39;t have potholes, except in our area. :/

Understand suspensions? Please take the required measurements for my
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post #25 of 50 (permalink) Old 07-27-2005, 04:17 PM
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I believe this was a previously pinned topic. Please re-pin.


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post #26 of 50 (permalink) Old 09-29-2006, 11:12 PM
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bumpity bump. resurrecting an old thread that should be pinned. it&#39;s about that time of year when the temp drops again, so everyone should check their tires!
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post #27 of 50 (permalink) Old 10-02-2006, 02:12 PM
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bumpity bump. resurrecting an old thread that should be pinned. it&#39;s about that time of year when the temp drops again, so everyone should check their tires!
[/b]

I could definetly use a check up, probably going to ask the dealership to do it after my next visit.

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post #28 of 50 (permalink) Old 10-09-2006, 05:17 AM
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i would like to thank you for this information i didnt know i should have increased the pressure on my tyres i allways thought the were under pressure after having read your guide i found am well below cheers from across the big pond
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post #29 of 50 (permalink) Old 10-12-2006, 10:23 PM
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Wish I would have read this before my stock tires wore out @ 15k miles. Mazda tells me to run 32 psi in my stock 225/25R18&#39;s. I had my car aligned thinking it was out and the shop told me to run around 40-45 psi. I thought they were a bit nuts at first, as the MANUFACTURER told me to run 32 .... looks like they&#39;re not so crazy after all.
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post #30 of 50 (permalink) Old 10-12-2006, 10:47 PM
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Quote:
my stock 225/25R18&#39;s....[/b]
25 series ..

stock 18&#39;s are 215/45. Mazda pdfs spec 35 for na, 38 for the turbo.

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