Tire pressure? Do you use the recommended door psi or tire psi?
#22
10-20-2008, 05:42 PM
The general "rule" is a few psi over the factory recommended specs. 33F/R is going to be more on the conservative side and skews a little toward ride comfort. I say if you're anything above 39 psi cold, your handling/braking/ride/tire wear/steering feel will suffer. But to each his own.
You may want to experiment for yourself and see what setting you like.
You may want to experiment for yourself and see what setting you like.
#23
10-20-2008, 05:43 PM
Thanks! Dang, still at 9. Trying to catch up to CrystalFiveMT whose at 13 (despite my MANY more posts)....
#24
10-20-2008, 05:56 PM
Hey TWGE08, how bout a boost in rep power for me, hehe. I'm dry over here. I just gave you one btw, wink wink.
#25
10-20-2008, 06:12 PM
puzzled
Why do you people give the slightest HINT of a damn about rep points?
#26
10-20-2008, 06:17 PM
We honestly don't, but it's a friendly rivalry between FitCanada Girl and me. We apparently have a lot of down time at work so we're going for maximum amusement.
Believe me, when we both joined we said the same thing as you did.
Believe me, when we both joined we said the same thing as you did.
#27
10-20-2008, 06:36 PM
I'm running at 46psi front and back, I need to check again though because temperatures have dropped a lot since I first pumped them up from 32psi the beginning of September.
I love my ride and my 45mpg+ by the way.
I love my ride and my 45mpg+ by the way.
#28
10-20-2008, 06:37 PM
Isn't that a little high?
#30
10-20-2008, 06:44 PM
Driving Under Pressure: Editorial & Features at Officer.com
09 FIT SPORT AUTO 45F AND 40R BEST COMBO OF MPG AND HANDLING
BRIDGESTONE(51 PSI)
42F & 38R BEST HANDLING
48 & 42 REAR BEST MPG
YOUR OPONION MY VARY...THUNDER
09 FIT SPORT AUTO 45F AND 40R BEST COMBO OF MPG AND HANDLING
BRIDGESTONE(51 PSI)
42F & 38R BEST HANDLING
48 & 42 REAR BEST MPG
YOUR OPONION MY VARY...THUNDER
#31
10-20-2008, 06:47 PM
Driving Under Pressure: Editorial & Features at Officer.com
09 FIT SPORT AUTO 45F AND 40R BEST COMBO OF MPG AND HANDLING
BRIDGESTONE(51 PSI)
42F & 38R BEST HANDLING
48 & 42 REAR BEST MPG
YOUR OPONION MY VARY...THUNDER
09 FIT SPORT AUTO 45F AND 40R BEST COMBO OF MPG AND HANDLING
BRIDGESTONE(51 PSI)
42F & 38R BEST HANDLING
48 & 42 REAR BEST MPG
YOUR OPONION MY VARY...THUNDER
#32
10-20-2008, 06:59 PM
I was just going to refer to the Officer.com review. I'm sorry, but I don't see me being under max sidewall as a bad/risky thing.
#35
10-20-2008, 09:37 PM
One thing to keep in mind is it is not just about tire wear and mileage....the more pressure the more the tire "balloons" that is ok for dry weather conditions. Let's think about wet and slippery conditions....if your tire is slightly ballooned then there is a very small contact patch of the tread in contact with the road which will increase the likelihood of hydroplanning or the tire loosing traction as it cannot effectively grip the road. Trust me when I say that a decent curb hit will be very expensive as it usually blows the seat air bag, front and side curtain airbags as well as damaging suspension.
#36
10-21-2008, 09:02 AM
Any idea how much it actually balloons the tire? I'm not really convinced something still under max sidewall is going to make it any more dangerous out on the road, even in wet conditions.
#37
10-21-2008, 09:26 AM
The balloon effect is pretty easily explained... to get better mileage, overinflation means your contact patch is effectively reduced, thus reducing rolling resistance (makes it less work for the engine). The door sticker manufacturer recommended pressures are different for each car because the loads on each tire for any particular car is different. From those settings, one can play and tune a little up/down.
You can read lots about it...
Tire Tech Information - Air Pressure – Correct, Underinflated and Overinflated
And here's an example of what low tire pressures do with wet conditions (the center of the tire lifts, thus reducing your contact patch). The opposite is true with high pressures, you'll have less contact with the outer side of the tires as all the air pressure is going to push the center of the tire outwards onto the road surface.
Tire Tech Information - Air Pressure vs. Wet Performance
You don't get something for nothing. The increased mileage is not worth the trouble if your tires wear out quickly, or worse yet if you get a blowout if you hit a pothole or curb while driving. The tire sidewall PSI is the max that a tire can handle, but it doesn't mean that it was meant for you to use that for your car.
You can read lots about it...
Tire Tech Information - Air Pressure – Correct, Underinflated and Overinflated
And here's an example of what low tire pressures do with wet conditions (the center of the tire lifts, thus reducing your contact patch). The opposite is true with high pressures, you'll have less contact with the outer side of the tires as all the air pressure is going to push the center of the tire outwards onto the road surface.
Tire Tech Information - Air Pressure vs. Wet Performance
You don't get something for nothing. The increased mileage is not worth the trouble if your tires wear out quickly, or worse yet if you get a blowout if you hit a pothole or curb while driving. The tire sidewall PSI is the max that a tire can handle, but it doesn't mean that it was meant for you to use that for your car.
#38
10-21-2008, 09:32 AM
Hey, less effort on working the rep points, more time working on Pufferfit ok? There, I've taken care of all that "down time" for you!
#39
10-21-2008, 12:17 PM
The balloon effect is pretty easily explained... to get better mileage, overinflation means your contact patch is effectively reduced, thus reducing rolling resistance (makes it less work for the engine). The door sticker manufacturer recommended pressures are different for each car because the loads on each tire for any particular car is different. From those settings, one can play and tune a little up/down.
You can read lots about it...
Tire Tech Information - Air Pressure – Correct, Underinflated and Overinflated
And here's an example of what low tire pressures do with wet conditions (the center of the tire lifts, thus reducing your contact patch). The opposite is true with high pressures, you'll have less contact with the outer side of the tires as all the air pressure is going to push the center of the tire outwards onto the road surface.
Tire Tech Information - Air Pressure vs. Wet Performance
You don't get something for nothing. The increased mileage is not worth the trouble if your tires wear out quickly, or worse yet if you get a blowout if you hit a pothole or curb while driving. The tire sidewall PSI is the max that a tire can handle, but it doesn't mean that it was meant for you to use that for your car.
You can read lots about it...
And here's an example of what low tire pressures do with wet conditions (the center of the tire lifts, thus reducing your contact patch). The opposite is true with high pressures, you'll have less contact with the outer side of the tires as all the air pressure is going to push the center of the tire outwards onto the road surface.
You don't get something for nothing. The increased mileage is not worth the trouble if your tires wear out quickly, or worse yet if you get a blowout if you hit a pothole or curb while driving. The tire sidewall PSI is the max that a tire can handle, but it doesn't mean that it was meant for you to use that for your car.
#40
10-21-2008, 12:48 PM
The balloon effect is pretty easily explained... to get better mileage, overinflation means your contact patch is effectively reduced, thus reducing rolling resistance (makes it less work for the engine). The door sticker manufacturer recommended pressures are different for each car because the loads on each tire for any particular car is different. From those settings, one can play and tune a little up/down.
You can read lots about it...
Tire Tech Information - Air Pressure – Correct, Underinflated and Overinflated
And here's an example of what low tire pressures do with wet conditions (the center of the tire lifts, thus reducing your contact patch). The opposite is true with high pressures, you'll have less contact with the outer side of the tires as all the air pressure is going to push the center of the tire outwards onto the road surface.
Tire Tech Information - Air Pressure vs. Wet Performance
You don't get something for nothing. The increased mileage is not worth the trouble if your tires wear out quickly, or worse yet if you get a blowout if you hit a pothole or curb while driving. The tire sidewall PSI is the max that a tire can handle, but it doesn't mean that it was meant for you to use that for your car.
You can read lots about it...
Tire Tech Information - Air Pressure – Correct, Underinflated and Overinflated
And here's an example of what low tire pressures do with wet conditions (the center of the tire lifts, thus reducing your contact patch). The opposite is true with high pressures, you'll have less contact with the outer side of the tires as all the air pressure is going to push the center of the tire outwards onto the road surface.
Tire Tech Information - Air Pressure vs. Wet Performance
You don't get something for nothing. The increased mileage is not worth the trouble if your tires wear out quickly, or worse yet if you get a blowout if you hit a pothole or curb while driving. The tire sidewall PSI is the max that a tire can handle, but it doesn't mean that it was meant for you to use that for your car.