Id highly advise a z1 differential brace next time you see it on sale, helps increase rear diff longevity and works really well in conjunction with a upgraded rear sway, 10 min install.

 

Evening! This is a public service announcement for anyone still operating their Red Sport (or other) vehicle with run-flat tires. I purchased my 2018 Red Sport (AWD) about three years ago from a local dealer. Prior to the purchase, they installed Bridgestone DriveGuard Plus run-flat tires. Initially, as it was my first experience without a spare tire, I didn't know the difference. I drove the car through an autocross event, some spirited drives on backroads, and some enthusiastic highway runs. I liked the car but was frustrated with its driving dynamics. It felt harsh, struggled with cornering, and overall felt clunky compared to my expectations. Since then, I've made several modifications, including a rear stabilizer, Fast Intentions cat-back exhaust, a heat exchanger, and drop-in panel filters. Despite these changes, I still considered trading it for SOMETHING Audi.

Fast forward to Friday, I installed four new ExtremeContact DWS06 Plus tires. Today, I took the car out for a run on my local winding roads. All I can say is that I should have done this from the start. It's a completely different car. To everyone on the forum who consistently advises to 'drop the run-flats,' my apologies for not listening sooner. For those still using run-flat tires, I recommend switching to experience the true potential of your car . PSA over!

You're preaching to the choir...

 

Tell us something we dont know

 

Don't know whether I'd go that far. Had the Michelin's on for only 800 miles, stronger sidewall, wider tread, better handling, but was turned off by the noise from a new tire, so installed the Conti's and sold the Michelines. At least the wife's happy now.

 

Put on my DWS06 at about 900 miles, I agree as do most here......

They make the car so much better...

 

What size are they?

 

I bought a 2014 infinity Q50. That has 17 inch wheels and snow tires on it. It said the car came with 19 inch wheels, 2 45 40 19. I believe. I plan on buying new wheels, 19 / 8 and a 1/2 inches. How wide can I go?Will a two seventy five fit

 

I believe 245’s in the front & 275’s in the back are perfectly fine from what I recall. Wondering if that’s the optimal set up for performance, reliability, & endurance. I’ve heard fatter tires aren’t always good for MPG & that too much grip (too wide of a tire) can make the car feel sluggish around corners. But I could be wrong. Happy to hear everyone’s opinion, I’m relatively new to the platform.

 

The 8.5" wide wheels will be fine for the 245/40-19, but the 275/35-19 tire calls
for a 9" minimum width wheel, so if you're going to install new wheels, look for 9"
all around, 245/40 square, but you'll also be able to use the 245/40 & 275/35 combo
if wanted.

 

255/285 Michelin replaced the miserable runflats..... and now it and me couldn't be more happy. But only because I did the limited slip diff FIRST. Now the Q can reach its potential.
Contis are good too. The Q really needs good traction first, then tires.

 

Evening! This is a public service announcement for anyone still operating their Red Sport (or other) vehicle with run-flat tires. I purchased my 2018 Red Sport (AWD) about three years ago from a local dealer. Prior to the purchase, they installed Bridgestone DriveGuard Plus run-flat tires. Initially, as it was my first experience without a spare tire, I didn't know the difference. I drove the car through an autocross event, some spirited drives on backroads, and some enthusiastic highway runs. I liked the car but was frustrated with its driving dynamics. It felt harsh, struggled with cornering, and overall felt clunky compared to my expectations. Since then, I've made several modifications, including a rear stabilizer, Fast Intentions cat-back exhaust, a heat exchanger, and drop-in panel filters. Despite these changes, I still considered trading it for SOMETHING Audi.

Fast forward to Friday, I installed four new ExtremeContact DWS06 Plus tires. Today, I took the car out for a run on my local winding roads. All I can say is that I should have done this from the start. It's a completely different car. To everyone on the forum who consistently advises to 'drop the run-flats,' my apologies for not listening sooner. For those still using run-flat tires, I recommend switching to experience the true potential of your car . PSA over!

It took you 3 years to figure this out? This is the first mod done to our cars as the run flats are Horrible .

 

M

Yep, my post attempts to convey that, apparently not that well🤷‍♂️

 

A limited slip diff on a RWD Q is a requirement... don't even bother to think about anything else until you have that. That's your dramatic transformation. Then summer tires.