255/40R20 tires
#1
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255/40R20 tires
Has anyone put 255/40R20 tires on the Audi A6 20 inch rims? Standard size is 255/35R20. I know it shouldnt be an issue and will give more tire thickness and protection.
#2
I don't have 255/40/20 tires but if you are upsizing the tire size to 255/40 from factory recommended 255/35, be aware that your speedo will be off by nearly 4%. (If you are driving at 100mph, you will actually be going at 104mph) Same goes for your mpg usage on DIS, you will see or "feel" that your gas mileage has gone worse. In general, I think it's wise not to go over the +/- 3% mark diff.
The overall diameter will also be 1 inch higher than stock so if you are lowered or plan on lowering later on, depending on the specs of the wheels of course but you might have rubbing issues against the fenders or the fender liner.
If you really had to upsize, I'd rather go for maybe a 265/35 which will be only 1% off or even 275/35 which will be like 2% off but I don't know how the width of the tire will clear inside the fenders.
Maybe it's just me but I'd stick with 255/35 since 255/40 won't give you any noticeable added protection and 255/40s probably cost way more than 255/35s since they're not a popular size of a tire.
On one of my previous car, the stock recommended size was 225/35 but I went 225/40 thinking that it will add more protection for the expensive wheels i had but I ended up having nothing but problems and regrets... (rubbing like crazy on bumps and turns, and 2 speeding tickets for ~5mph over 65 limit when I set my cruise control at around 65.)
The overall diameter will also be 1 inch higher than stock so if you are lowered or plan on lowering later on, depending on the specs of the wheels of course but you might have rubbing issues against the fenders or the fender liner.
If you really had to upsize, I'd rather go for maybe a 265/35 which will be only 1% off or even 275/35 which will be like 2% off but I don't know how the width of the tire will clear inside the fenders.
Maybe it's just me but I'd stick with 255/35 since 255/40 won't give you any noticeable added protection and 255/40s probably cost way more than 255/35s since they're not a popular size of a tire.
On one of my previous car, the stock recommended size was 225/35 but I went 225/40 thinking that it will add more protection for the expensive wheels i had but I ended up having nothing but problems and regrets... (rubbing like crazy on bumps and turns, and 2 speeding tickets for ~5mph over 65 limit when I set my cruise control at around 65.)
#3
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I too have considered going to 255/40 20's because of the increase in wall height and therefore a less jolting ride.
4% error in diameter should fix the error in the speedometer from stock and the DIS MPG can be modified to compensate.
There are plenty of tires out there in that size including the Michelin PSS so I too am interested in feedback regarding the OP.
4% error in diameter should fix the error in the speedometer from stock and the DIS MPG can be modified to compensate.
There are plenty of tires out there in that size including the Michelin PSS so I too am interested in feedback regarding the OP.
#4
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I don't have 255/40/20 tires but if you are upsizing the tire size to 255/40 from factory recommended 255/35, be aware that your speedo will be off by nearly 4%. (If you are driving at 100mph, you will actually be going at 104mph) Same goes for your mpg usage on DIS, you will see or "feel" that your gas mileage has gone worse. In general, I think it's wise not to go over the +/- 3% mark diff.
The overall diameter will also be 1 inch higher than stock so if you are lowered or plan on lowering later on, depending on the specs of the wheels of course but you might have rubbing issues against the fenders or the fender liner.
If you really had to upsize, I'd rather go for maybe a 265/35 which will be only 1% off or even 275/35 which will be like 2% off but I don't know how the width of the tire will clear inside the fenders.
Maybe it's just me but I'd stick with 255/35 since 255/40 won't give you any noticeable added protection and 255/40s probably cost way more than 255/35s since they're not a popular size of a tire.
On one of my previous car, the stock recommended size was 225/35 but I went 225/40 thinking that it will add more protection for the expensive wheels i had but I ended up having nothing but problems and regrets... (rubbing like crazy on bumps and turns, and 2 speeding tickets for ~5mph over 65 limit when I set my cruise control at around 65.)
The overall diameter will also be 1 inch higher than stock so if you are lowered or plan on lowering later on, depending on the specs of the wheels of course but you might have rubbing issues against the fenders or the fender liner.
If you really had to upsize, I'd rather go for maybe a 265/35 which will be only 1% off or even 275/35 which will be like 2% off but I don't know how the width of the tire will clear inside the fenders.
Maybe it's just me but I'd stick with 255/35 since 255/40 won't give you any noticeable added protection and 255/40s probably cost way more than 255/35s since they're not a popular size of a tire.
On one of my previous car, the stock recommended size was 225/35 but I went 225/40 thinking that it will add more protection for the expensive wheels i had but I ended up having nothing but problems and regrets... (rubbing like crazy on bumps and turns, and 2 speeding tickets for ~5mph over 65 limit when I set my cruise control at around 65.)
Since the A7 comes with the same rim size but 255/40R20 tires, I thought it shouldn't be an issue on the A6 since its a similar chassis. But now I am not sure. The size 265/35R20 doesn't come with the Michelin Pilot Sport A/s tires.
#5
AudiWorld Member
I have not run that particular size but have run PSS 275/35 20 which have a diameter of 27.6" vs 28" for the 255/40 20. The only issue I had, which was minor, was a little rubbing of the rear fender inner liner when going over bumps. My car is lowered about an 1" to 1.25" from the stock sport suspension height. With my PSS installed they corrected the speedo error to were the error was at most off by 0.5 mph based on a GPS based comparison. In my opinion using a 255/40 20 tire really should be no problem except may be under certain lowered suspension conditions.
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I have not run that particular size but have run PSS 275/35 20 which have a diameter of 27.6" vs 28" for the 255/40 20. The only issue I had, which was minor, was a little rubbing of the rear fender inner liner when going over bumps. My car is lowered about an 1" to 1.25" from the stock sport suspension height. With my PSS installed they corrected the speedo error to were the error was at most off by 0.5 mph based on a GPS based comparison. In my opinion using a 255/40 20 tire really should be no problem except may be under certain lowered suspension conditions.
A bit of a stretch no?
#7
I'd like a taller sidewall, no doubt about it, but I suggest playing around with inflation pressures before going to an oddball tire size. See if you can find a balance between uneven wear and ride comfort. With that said, also consider that sidewalls are very different among different tire brands and models, so perhaps try to find a 255/35-20 which better matches your wants/needs?
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#9
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Did any of you have any issues with the 20 inch rims and potholes? I am not opting for the tire/wheel insurance for 1,600 for 5 years. Too much and I won't even break even.
I am considering the 275/35R20 tires in Michelin Pilot Sport A/S 3. Thank you jr'saudia6!
I am considering the 275/35R20 tires in Michelin Pilot Sport A/S 3. Thank you jr'saudia6!
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