taal2020 Report post Posted March 27, 2013 Guys, I have Michelin Tires (P245/60R18 104 T). What is the ideal tire pressure when filling air? Please suggets Share this post Link to post Share on other sites
omar302 Report post Posted March 27, 2013 Manufacturer recommends 35 PSI. I believe the TPMS comes on at around 28 PSI. If your driving high speeds, it is better to go for 35 PSI. If your driving in the city, with bad roads like where I live, I would suggest 30 PSI & the TPMS will not come on. Share this post Link to post Share on other sites
taal2020 Report post Posted March 27, 2013 I have read in some of the sites that, having 38psi will increase the mileage...but could lead to tires getting worn out more quickly... Share this post Link to post Share on other sites
Waldo Report post Posted March 27, 2013 There is no ideal pressure. The ideal pressure is different for everybody and their unique driving conditions. Higher pressures will give you better mileage and often better steering response. But higher pressures will cause uneven wear, they will make the ride harsh and they will reduce the amount of grip which increases the stopping distance and makes the vehicle less capable in emergency handling maneuvers. Too high a pressure (above the max rating on the sidewall) can cause tire failure. Lower tire pressure have generally the opposite effects as those above. However most people don't consider the load capacity of the tire. As pressure goes down, the load capacity also goes down. Once you exceed the load capacity, you run the risk of tire failure. Since OEMs don't specifically call out the lower limit of the load capacity of the tire, one must assume that the OEM tire pressure is the lowest you can safely go. Running anything below the recommended pressure is a safety risk. Running your Edge at 30psi around the city in reasonable weather is probably fine, but running it at 30psi while driving across Arizona in the summer with a family and full load of luggage would be pushing too close to the limit for my comfort. Share this post Link to post Share on other sites
NatG Report post Posted March 29, 2013 From my experience, it's best to go by the tire. I have the Michelons on my Edge. MAX cold PSI is 44. So When they are cold, I fill between 38 and 40 PSI. I find the shape of the tire is best at this rating, it sits nicely on the ground, and the ride is better than lower pressures. I do not drive super aggressively, and I have about 37,000 on the car with a pretty generous amount of tread left (original tires). Make sure to Rotate regularly. Share this post Link to post Share on other sites
Feirstein Report post Posted March 30, 2013 Start with the recommended pressure. If driving with a full load while pulling a trailer, then add several lbs. If driving over 90 mph for an extended period add a few lbs. But the recommended pressure, around 35 lbs is recommended for normal use. Don't run lower pressure than 35 lbs. Share this post Link to post Share on other sites
Edgieguy Report post Posted April 1, 2013 I run my 22s with 38lbs of nitrogen. My Sport consistently gets into the 21mpg range with a 50/50 mix of driving. Share this post Link to post Share on other sites
akirby Report post Posted April 1, 2013 I run my 22s with 38lbs of nitrogen. My Sport consistently gets into the 21mpg range with a 50/50 mix of driving. I prefer a Nitrogen/Oxygen blend (roughly 78% Nitrogen, 21% Oxygen). 1 Share this post Link to post Share on other sites
Dingo Report post Posted April 1, 2013 Kirby, I figured you'd use butane. Share this post Link to post Share on other sites
akirby Report post Posted April 1, 2013 Kirby, I figured you'd use butane. I tried helium once but I couldn't keep the wheels on the ground. Share this post Link to post Share on other sites
WWWPerfA_ZN0W Report post Posted April 2, 2013 N2O over here for a riot on wheels. Share this post Link to post Share on other sites
Feirstein Report post Posted April 3, 2013 Hydrogen is the ticket! Lightens the vehicle and you only have to top it off twice a day. Share this post Link to post Share on other sites
akirby Report post Posted April 3, 2013 Hydrogen is the ticket! Lightens the vehicle and you only have to top it off twice a day. Share this post Link to post Share on other sites
MFdad13 Report post Posted July 7, 2013 Why would you go by what the tire states? That is the pressure you would run at full capacity. Always go by what the door placard says. Share this post Link to post Share on other sites
2011edgese Report post Posted January 30, 2014 Mehhh... The door says 35 when cold. I took a tip from someone that said to drop it 3 or 4 psi to make the ride smoother. I dropped it to 31psi all around and noticed a audible growl noise later. Put the pressure back to 35psi a month later and now the tires howl in the freeway. Be careful. Share this post Link to post Share on other sites
2011edgese Report post Posted February 17, 2014 (edited) Now I'm at 39psi since my tires day max is 44psi. Just to get rid of the howling at certain hover mph.lol I rotated the tires to see if I could quiet them. It's worse now. Lol. Turns out, performance ties that are directional are notorious for boar due to the tie grip pattern wearing at the edge causing the howling. Edited February 17, 2014 by 2011edgese Share this post Link to post Share on other sites
