Today, my buddy and I were bored and he had some spare wheels sitting around that were sized 18x9 +30, had 265/35/18 tires on them. We decided to put them on my car to see what they would look like. My car is currently fully stock, stock wheels everything stock!

So, we put his wheels on, and I go out to test how it feels because he said the tires arent balanced and suggests I try driving it at freeway speed to see if it wobbles and etc.

I start driving down his street and I get prepared to make a left and then I hit the brake pedal and there is almost ZERO resistance, the pedal was pretty much on the floor. I had to lift and pump it again to get pressure back. I made a U-Turn and went back to my friend's house and tested the brakes again. Same thing as the first time, little to no pressure, and I had to double pump to get pressure back in the brakes again.

We are both stumped, were guessing it has to do with the TPMS or ABS, not really sure. There were no warning lights at all on the dash or anything, I was expecting the TPMS to go off but it didn't. I only drove the car down the street and back. Maybe because the tire was a 35 series and not a 40? Bah, I don't know.

Should I have driven it for a little bit longer, like a mile or something? I didn't want to because I was scared I would hit somebody if my brakes didn't work when I wanted them to.

I have read a few threads about people using wheels without putting the TPMS sensor in them and all they get is the annoying TPMS warning on the dash, but I had NO warnings at all.

Anyways, has anyone ever experienced this? We put my stock wheels back on and everything is fine, I didn't need to double tap the brakes to get pressure in them, it was back to normal.

Sorry for the long read.

cliff notes: Swapped stock wheels with aftermarket, brakes don't work. Swapped back to stock, brakes work fine.

doesn't make sense. i swapped to another set of wheels and never had that problem. just because the tpms are not present does not mean the brakes will not work. it takes over 100 miles for the car to recognize the tpms are not present. did you use the stock lugs or aftermarket lugs? usually the stock lugs are not meant for aftermarket wheels.

We used the stock lugs. Ya we are completely baffled, both of us have changed wheels 2930809 times and we never experienced anything like this.

the tpms warning will not come on immediately, it took mine 3 days to come on.

maybe the lugs were too long.

Oh i see.

I think it was just our installation error. I'll try it again with aftermarket lugs. Using the stock lugs didn't really feel right.

^^That's probably it. You normally can't use stock lugs for aftermarket rims. The rims you swapped probably required an acorn type lug nut. The vibration caused by the wrong lugs probably threw off the ABS sensor and made you brakes feel weird.