The brakes are fine. The tires are fine. The all-wheel drive is doing exactly what it was built to do.
And yet, you still aren’t going to stop.
On flat ice, a tire's coefficient of friction is around 0.1, and the Transportation Research Board notes it sometimes drops to near zero.[1] Dry asphalt is conventionally put at 0.7 to 0.9. Nothing else about the car changes — same brakes, same weight, same driver. The road just stops holding on.
Crashes on snow, ice or slushy roads across the state between December 2023 and March 2024. Fifteen of them were fatal. The winter before that, 20 fatal crashes killed 26 people.[2]
All three[2]
Note what those two causes have in common. Neither is a skill problem. Both are decisions made before anything went wrong, by someone who felt fine.
I sell a lot of all-wheel drive. It is genuinely good, and it is good at one thing: putting power down so you can go. Stopping is a different system entirely — it is done by the brakes and by four patches of rubber roughly the size of your hands, and every car on the road has both regardless of what drives the wheels. Sending engine torque to four wheels instead of two does not add grip when you are off the throttle and trying to shed speed.
Which puts the weight on the tires. AAA is blunt about the limits of the all-season tires most cars leave the lot on: the ones marked "M+S" are only evaluated for packed snow and mud, and "do not account for performance on ice, slush or in very cold climates."[3]
If you only change one thing this winter, change the tires, not the drivetrain.
AAA ran this test on a Camry. All-season tires worn down to 4/32" needed 42% more distance to stop than new ones.[4]
Here is the version of that number that actually lands. Braking from 60 mph, at the point where the new tires had completely stopped, the worn ones were still doing 39 mph.[4]
Thirty-nine miles an hour, arriving at a place the other car had already parked. And that test was run on wet pavement, not ice.
The Federal Highway Administration puts it at more than 1,300 killed and 116,800 injured every year in crashes on snowy, slushy or icy pavement. Just under a quarter of all weather-related crashes happen on that surface.[5]
If you’re buying in the winter and choosing between all-wheel drive and a set of proper winter tires, the tires are the better safety purchase. I’d rather tell you that than sell you the upgrade and have you stranded on the side of I-75.
Although if you can have both — all-wheel drive is the one feature on a vehicle that does not depreciate, and I’d highly recommend it. You pay for it once, and any time you sell in the future you get your money back out of it on resale.
If you want to talk about tires, all-wheel drive, or what's actually on the lot, I'm at 937-830-7925. No form, no follow-up sequence.