well if you don't care about the accuracy then don't worry about it....GM HAS to state it to avoid law suits.
They also advise you to replace the spare hoist because of the added weight the 22's have...the stocker won't handle it....hate to see a 22 suddenly drop out @ 70 mph!!!!
Part # 19158309
I understand businesses have to cover their butts and discourage using aftermarket parts. They have to do that to protect their own interests.
Most people believe that the factory speedometer has a % error on it anyway, so a less than 3% change isn't going to be significant. Of course, closer to zero is better, but depending on the direction of change, you might actually be making your speedo
more accurate
.
Also, when people buy aftermarket wheels, they don't usually buy a 5th for the spare. In fact many manufacturers only include a steel/temporary spare anyway--even if you have factory alloys. There's no reason to buy a 22" spare, just use the stock one. If people have upgraded properly with the same overall diameter, that OEM spare is going to do fine for getting people to the nearest gas station or tire shop--as safe as (or safer than) any tiny temporary donut can be on a passenger car.
That's a good point. I just want to make sure everything is working properly (ABS and Stabilitrac).
Stability control and ABS rely upon the relative speed that all four wheels are spinning at. If one wheel spins faster than another, the system kicks in by appling brakes and/or throttle control. If the overall diameter is the same as stock, under normal conditions the wheels will spin at the same speed that the computer is expecting. No problems there.
The biggest issue concerning upsizing to larger rims is whether the brakes are big enough to stop the additional weight.
Are the Tahoe's brakes any different than the Suburban's? You can get 20" factory rims on the Tahoe/Suburban. When you order it, does GM install larger brakes on for you? It's the same with the Escalade. When you upgrade the 18" wheels on the Escalade and get the 22" rims, does GM install a larger brake system? I don't think so. Is GM waiting for lawsuits to come pouring in? I don't think so. They must have designed the brake system so that it could handle all the factory options with safety.
The question that should be answered is are the brakes on an Escalade any different than the brakes on a Tahoe or Suburban or Yukon or XL Denali? I think at 22" you don't have to worry. When you get up to much larger sizes like 24" and 26" then I think you have to worry
.
I've upgraded wheels and tires and many different vehicles and they all follow the same guidelines. Granted, I've never owned a GM vehicle before this one, so unless GM does something really weird with their vehicles, I would assume that the same principals apply as they do to the imports.
