DasWagen
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- Buick Ownership
- 2018 Tour x
I'm guessing 6mm would be noticable?
Looking at some 20" Lacrosse wheels. The wheels are larger but the sidewall is less so the total extra diameter is only +.4". I understand the Buick ride height was raised a half an inch so there should be room in the wheel well. Will this affect any of the stability/TC electronics?
View attachment 12956
Will this affect any of the stability/TC electronics?
No, anti-lock, stability, traction control are all non-issues.
Look at the weight, though. Plus-sizing rims usually means dramatically more weight.
You sound like my TDI-brethren looking for maximum fuel economy by being conscious of rotational mass. 😉
Joking aside this is a valid point. Even these alloys get quite heavy, and the tires too.
Nevermind the rotational mass... Think of the unsprung weight.
People usually assume that bigger wheels/shorter tires ride badly because there's not enough sidewall compliance, but a lot of that is the greater unsprung weight.
See here: https://www.caranddriver.com/features/effects-of-upsized-wheels-and-tires-tested
The baddest wagons I ever owned were all three of the 149 1991 Audi 200 Turbo Quattro Wagons that were imported into the US. Only available with 5 speeds and with loaded (for their day) with the only choices being exterior and interior color and "Sport" or "Comfort" seats in the front. Car and Driver said that if Lamborghini made a wagon, this would be it. One unique feature were the ultra light 15 inch BBS factory wheels which were there to reduce unsprung weight. In order to get sufficient braking the calipers were installed around the center of the brake rotors which were "affectionately" known as UFO's for their odd looking design. Unfortunately, if you can find them, a set of these rotors (two) will run you a cool grand or more and parts for these cars are so hard to find I finally gave up my last 200TQW a couple of months ago. Here's a quick tutorial on some automotive history.... and a photo of my last one, not a bad looking rig for a 27 year old car. It would pull sub 15 sec quarter miles at my local drag strip on street nights without even beating on it, although it was chipped. (link below photo)View attachment 12971 https://www.quattroworld.com/audi-news/audis-world-ufo-brakes-worked-also-kinda-didnt/
Nevermind the rotational mass... Think of the unsprung weight.
People usually assume that bigger wheels/shorter tires ride badly because there's not enough sidewall compliance, but a lot of that is the greater unsprung weight.
See here: https://www.caranddriver.com/features/effects-of-upsized-wheels-and-tires-tested
Interesting article. Too bad C&D didn't post the weights of each to see the change as you increase, or how performance was affected.
Fake news?