Looks like my tires are bumpy!

[tolum]

Hi;

Tires pressure is ok. My car is in a garage that have a concrete floor. Night & days are now cooler. When I leave home in the morning, it looks like my wheels are more square that round for the first mile or 2. Is this normal? Does that mean my tires are not a good quality one. They were on the car when I did buy it. They are Nexen tires. Anybody else have that bumpy sensation when leaving home in the morning? Any cure to that?

Thansks!

[White987S]

This is common. Termed "flat spotting". Normal.

[kbrandsma]

Park on plywood or rubber mat.

[ericinboca]

Agree with two previous replies. Wood does help. THey should be "rounding" back out after they get warm.

[tolum]

Thanks you all. First, found this morning that air pressure drops by 2-3 PSI per wheel (cold weather, winter comming) and second, I will buy recycled rubber mats like what you see at the arena to protect skates.

Thierry

[grover]

Are you using summer tires? Summer and winter tires use different rubber compounds. Winter tires are more flexible at colder temperatures, and shouldn't have this problem. It will only get worse when it gets colder.

If your tires are so cold as to deform and not rebound properly, grip is almost certainly suffering as well. Masking it by parking on something softer is just masking the symptom, not fixing the problem.

This is common. Termed "flat spotting". Normal.

Flat spotting is when you lock the brakes and wear a flat spot in the rubber. It doesn't improve when the tires warm; this is related to the elasticity of rubber. Edited October 9, 2009 by grover

[White987S]

This is common. Termed "flat spotting". Normal.

Flat spotting is when you lock the brakes and wear a flat spot in the rubber. It doesn't improve when the tires warm; this is related to the elasticity of rubber.

I would say we are both right. The term "flat spotting" is used to desribe both phenomenon.

[grover]

I would say we are both right. The term "flat spotting" is used to desribe both phenomenon.

Yes, I do believe you're right, my mistake. Edited October 10, 2009 by grover