cloud19

Hi, This may sound silly but I'm a newbie to this forum and to CUVs. What tire pressure would you recommend and/or are running?

Cold TP 32psi felt too soft, there was noticeable body roll and a bit of understeer. Overall, the RDX had a very nervous feel to it. 34 felt comfortable and confident until the heat wave struck and it was boosted to 35/36 just by the temperature difference. Now that the temps are cooling, the tires are back to 34 and the nervous wobble is back.

I don't want to run the tire pressure too high nor run the risk of a blowout, but I don't want to feel the nervous elephant wobble either. Is it ok to run at 35psi even though Acura recommends 32? Thanks in advance for your input!

737 Jock

This might be more a factor of the kind of tires you are running and their sidewall stiffness. A tire with a lower load index/speed rating such as a Goodyear Assurance 235/55R18-99T may require higher pressure to feel secure than a tire with a higher load/speed rating such as a Pirelli Scorpion Zero 235/55R18-104V.

But the pressures you are using are well within normal for temperature variances. A change of 2 to 3 psi will occur simply as the tires heat in normal driving. However, a cold baseline pressure of 35 psi is about the upper limit for most tires and may wear out the tire center-rib early.

It's also possible that your "nervous elephant wobble" may be a problem with the suspension. Start with checking the lugnut torque.

cloud19

Thanks, I just got the car a less than 2 months ago and I'm still on stock Michelins. I've found 37F/36Rpsi feels about right and there's no sidewall flex.

The car is new, can the suspension really be the culprit?

Carbon2008RDX

Hey Cloud 19 - There is no problem in adding a few extra PSI. I have been doing this for years with multiple cars!! I love how it sharpens up the "sportiness" but is a small sacrifice hence a stiffer ride. If you have a strictly FWD vehile I highly recommend about 2-3 higher in the fronts vs. the rears. For the RDX with SH-AWD I set mine between 34 to 35 PSI cold at all four corners.

Be aware of the change of seasons tho. The tempurature can radically move the tire pressures up or down. I adjust mine about four times a year to match the season. Check your TPMS often. It'll warn you if the PSI get too low but not too high!

737 Jock

I'm not sure. I've never actually seen an elephant, so I'm not sure how one suffering from an attack of nerves would ride or handle. But if something feels loose, I'd check the nuts.....um, the lug nuts.

That's great advice!

pickler

wobble? in the rdx? you sure? i have driven many cars in my life and the rdx has no wobble. something wrong with your suspension. Set your tire PSI to 35 if 32 is too soft for you. anything higher and you loose traction with the OEM tires. Anything lower than 32 and you will lose grip.

princelybug

iTrader: (16)