I have a base and switched to Badlands wheels and tires. When my speedo is 30 it's actually 32 according to the speed cameras. After 30 mph, it's 4 mph over. Haven't checked over 60. I adjust my speed to suit, hopefully.
I have a '22 Base and had the bad smell intermittently also. Filled a plastic dish with baking soda and stuck it under my seat--I've got a 2 door and live alone,so apart from a friend now and again, nobody sits in the back. It worked! Smell gradually disappeared.
I have a'22 2dr and this happened to my passenger side after folding back seats down to carry my grandson's bike. After an hour it suddenly worked again.