beeristasty wrote:It will affect the odometer, making it greater than 10-15% slow, assuming you're getting tires with 30-40mm of sidewall height.
To get even close to that sidewall height, you're going to need a tire with an aspect ratio of somewhere south of 20, which should be near impossible to find for a 19" rim.
Plus, if you do find a tire with that profile, you'll probably scrub on everything, especially if you plan on dropping the ride height.
Okay, Darn, so it will make the odometer display a speed that is 10% slower than what I am going. I do not plan on dropping the ride, just swapping the rims. I think the tires will be around 30-40mm like you said.