OK slow day- Tyre pressure
#1
06-26-2008, 07:52 PM
OK slow day- Tyre pressure
Toyo ZR4 proxes Sidewall says 50psi max. Fuel filler door says 30/30 below 100 mph and 35/38 above 100 mph.
I've got 40 in there now and like the way it rides.
225/45-17
And this from the 2004 x-type owners manual, mine is an 02 sport.
Tyres other than those recommended
must be inflated to the following cold
inflation pressure (front and rear):
44 lbf/in² (3.0 bar, 300 kPa, 3.1 kg/cm²).
What are you running and why?
Andy
I've got 40 in there now and like the way it rides.
225/45-17
And this from the 2004 x-type owners manual, mine is an 02 sport.
Tyres other than those recommended
must be inflated to the following cold
inflation pressure (front and rear):
44 lbf/in² (3.0 bar, 300 kPa, 3.1 kg/cm²).
What are you running and why?
Andy
#2
06-26-2008, 10:03 PM
RE: OK slow day- Tyre pressure
Never mind the numbers on the fuel door..those are for maximum comfort in the ride..hard on tires in the long run..
anywho...I run 37 PSI year round...1. Because it reduces premature tire wear, as all the tread is in contact with the road uniformly...2. Tires run cooler and reduces the side wall breakdown...3. It saves money in mileage as the tires offer less friction to rolling...
Ride is a little firm..but I like it that way as well.
anywho...I run 37 PSI year round...1. Because it reduces premature tire wear, as all the tread is in contact with the road uniformly...2. Tires run cooler and reduces the side wall breakdown...3. It saves money in mileage as the tires offer less friction to rolling...
Ride is a little firm..but I like it that way as well.
#5
06-27-2008, 06:06 AM
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RE: OK slow day- Tyre pressure
Andy, asking what tire pressure you should run is kinda like asking what your favorite color is. Everyone has an opinion on this.
Here is something that you can do and it is really easy to do. Get yourself some of the colored sidewalk chalk (the big chalk sticks the kids right on the roads and sidewalks with) and some white paper. Now, pick a side of your car and coat the tires from side to side with the chalk atleast 90 degrees of the tire. Then lay the paper down in front of both tires so the colored part of tire will come in contact with the paper. Now, drive forward over the paper, transferring the chalk to the paper. Look at the paper. Do you see an exact imprint of your tire tread on the paper? If yes, then you have the correct tire pressure. If the center of the tire looks a bit weak, then you need to increase the tire pressure. If the outside edge looks a little weak, then you need to lower your pressure. Repeat till you get a nice tread pattern.
Every tire is made with different things in mind. So, one style tire will require you to run a lower pressure than another because of sidewall construction, plys, etc.
If anything, running the tires a bit on the hard side (higher pressure) is better for mileage and won't dramatically affect tread wear as compared to the same change with the pressure low.
Chris "Thermo" Coleman
Here is something that you can do and it is really easy to do. Get yourself some of the colored sidewalk chalk (the big chalk sticks the kids right on the roads and sidewalks with) and some white paper. Now, pick a side of your car and coat the tires from side to side with the chalk atleast 90 degrees of the tire. Then lay the paper down in front of both tires so the colored part of tire will come in contact with the paper. Now, drive forward over the paper, transferring the chalk to the paper. Look at the paper. Do you see an exact imprint of your tire tread on the paper? If yes, then you have the correct tire pressure. If the center of the tire looks a bit weak, then you need to increase the tire pressure. If the outside edge looks a little weak, then you need to lower your pressure. Repeat till you get a nice tread pattern.
Every tire is made with different things in mind. So, one style tire will require you to run a lower pressure than another because of sidewall construction, plys, etc.
If anything, running the tires a bit on the hard side (higher pressure) is better for mileage and won't dramatically affect tread wear as compared to the same change with the pressure low.
Chris "Thermo" Coleman
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