Boun

Just got Nitto Motivo installed, front set at 35 and rear set at 37. Ride is smooth and comfortable, grib is excellant so far from only 75miles on them, But looking at front tires it looks under deflated at 35psi. Anyone having same issue with their Motivo on 2nd Gen TSX?

justnspace

iTrader: (1)

pump pump pump it up!
pretty much tire pressure is personal preference. if you think it looks a little low at 35PSI, pump it up to match the rear!!

with tire pressure; you can make the car react differently. so depending on what you want the car to do....you manipulate tire pressure...
also, tires are different and some require more PSI than others, etc..

Boun

Thanks I will certainly increase the psi and see where/how it looks and ride!

justnspace

iTrader: (1)

generally, 37-40 psi helps fuel economy and provides a nice cushy ride.
generally, if the rear has more PSI than the fronts INCREASES oversteer.
generally, if the front has more PSI than the rear, INCREASES understeer

I like to have my tires pretty uniform all around..my current tires i have set at 35.5-36psi all around, and as they warm up, the pressure will increase slightly.

justnspace

iTrader: (1)

this is a great chart by tirerack!
https://www.tirerack.com/tires/tiret....jsp?techid=58

ceb

C'mon, you've been here long enough to know that you can't judge a low profile tire by "it looks low". To say that different tires require different pressure is equally ridiculous.

What is correct is that one can (and should) adjust pressure within reason to find the handling/comfort/mpg sweet spot for your driving style.

IIRC, the recommended PSI is 33lbs. That is what the manufacturer decided was the ideal compromise between handling, comfort and fuel economy. That usually isn't ideal in the real world as the 33 is biased towards comfort. Accordingly, start there and increase the pressure incrementally but don't go below 3 or over about 45. I run 39psi on all 4 corners but I don't drive very hard and have mine biased towards fuel economy and handling.

ceb

...if you are doing an autocross or other racing. The tire pressure chart is completely useless for road cars.

justnspace

iTrader: (1)

you still can manipulate tire pressure to get the car to do what you want. I like over steer. And I set my nontrack car to oversteer

ceb

Sure. The theory is correct but the numbers are way off.