Worth Upgrading from 19s to 20s? Ride Comfort Feedback Wanted

[ChitownStang]

Stock suspension?

Yes, non -hp dark horse

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[MAT1955]

.....all other parameters equal a bigger rim size with therefore a smaller tire sidewall profile will give a harsher ride.

 

[robvas]

Might not be an "upgrade"

19's are likely lighter.

if you want the looks of 20" wheels just buy them. The difference in ride quality or performance will not be huge. It's only an inch.

 

[Skye]

I'm attaching some reference links. These are not DH-specific, but will have feedback from others.

https://www.google.com/search?q=mus...HcKaM0oQrQIoAnoECBkQAw&biw=1470&bih=747&dpr=2

The circumference of the tire can vary larger or smaller, to a point. Going beyond a limit, shift points can change, ABS can be affected, along with other electronics.

https://www.mustang7g.com/forums/threads/pre-collision-assist-cruise-control-problem.170023/

The idea of going from a 19 to a 20 is not an issue. The idea of going from a 18 or a "short" 19 to a "tall" 20, could be.

Going to a taller tire, to stay close to the original, many go from a 35 profile to a 30. With that, the ride is generally harsher.

Road conditions will be a factor. If you live in an area with good roads, it might be a nice change. With poor roads, you might stick with the 19s.

Attached is a tool with rim size and offset for the factory rims. It was created by the folks at https://dragracingwheels.com/ , a sponsor of this site.

This is a good site for reviewing differences in sizing: https://tiresize.com/comparison/

 

[Charger68]

I've owned 2025 GT's with both 19 and 20. With a stock suspension, and going to 265/35R20, you'll hardly notice a difference. It seems handling is better. I bought a new 2020 Z51 Corvette with Mag Ride, and regardless of the Tour setting, my 6 speed GT with 20 inch wheels is easier to take.

 

[kinelisch]

I've owned 2025 GT's with both 19 and 20. With a stock suspension, and going to 265/35R20, you'll hardly notice a difference. It seems handling is better. I bought a new 2020 Z51 Corvette with Mag Ride, and regardless of the Tour setting, my 6 speed GT with 20 inch wheels is easier to take.

Thanks for the input. For the 20s, what brand of tire did you have in your GT?

 

[kinelisch]

I'm attaching some reference links. These are not DH-specific, but will have feedback from others.

https://www.google.com/search?q=mus...HcKaM0oQrQIoAnoECBkQAw&biw=1470&bih=747&dpr=2

The circumference of the tire can vary larger or smaller, to a point. Going beyond a limit, shift points can change, ABS can be affected, along with other electronics.

https://www.mustang7g.com/forums/threads/pre-collision-assist-cruise-control-problem.170023/

The idea of going from a 19 to a 20 is not an issue. The idea of going from a 18 or a "short" 19 to a "tall" 20, could be.

Going to a taller tire, to stay close to the original, many go from a 35 profile to a 30. With that, the ride is generally harsher.

Road conditions will be a factor. If you live in an area with good roads, it might be a nice change. With poor roads, you might stick with the 19s.

Attached is a tool with rim size and offset for the factory rims. It was created by the folks at https://dragracingwheels.com/ , a sponsor of this site.

This is a good site for reviewing differences in sizing: https://tiresize.com/comparison/

Awesome. Thanks!

 

[Starship Enterprise]

Know that 20" wheels come with a metal cowl brace from the factory regardless of performance pack option. My ride is fine but I guess the stiffer tire puts more flex on the chassis.

 

[Charger68]

Thanks for the input. For the 20s, what brand of tire did you have in your GT?

The tire that came with the car: Goodyear Eagle All Season.

 

[Aggie1999]

Nice DH! I heard that 20s make the ride harsher but Thanks for the feedback. Much apprecited.

Like Chitown, I went from 19's to 20's and I like the ride better now. I went with 275/35 and 305/35, but I sill have a bigger side wall that my OE 255/40's.

 

[kinelisch]

Like Chitown, I went from 19's to 20's and I like the ride better now. I went with 275/35 and 305/35, but I sill have a bigger side wall that my OE 255/40's.

You have more side wall on the rears but not the fronts. (According to math...)

255/40 is about 102mm side wall
275/35 is about 96 mm side wall
305/35 is about 107 mm side wall

 

[Junkyard Dog]

14 inch wheels with 70 or 75 aspect ratio were a very cushy ride on my 1966 GTO, like flouting on clouds of air

 

[LouG]

The bigger wheel with less tire absorbs bumps better?

It's about sidewall height and rigidity, it may not ride worse, better is a long shot

 

[Cz_Ziemniak]

It's about sidewall height and rigidity, it may not ride worse, better is a long shot

I'm aware

 

[Aggie1999]

You have more side wall on the rears but not the fronts. (According to math...)

255/40 is about 102mm side wall
275/35 is about 96 mm side wall
305/35 is about 107 mm side wall

I hear what you are saying... I guess I need to put the 305's on the front and then go get some 315's for the rear. I like the way you think!

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