help me choose,

STOCK IS THE FIRST ONE,
here is my data on speed, size, contact patch, and % speed diff.

Whats more important for performance? contact patch size or tire diameter?

Stock Tire - 245/45R18
Search Tires Tire 1 - 245/40R19
Search Tires Tire 2 - 255/40R19

Section Width: 9.64 in 245 mm
Section Width: 9.64 in 245 mm
Section Width: 10.03 in 255 mm

Rim Diameter: 18 in 457.2 mm
Rim Diameter: 19 in 482.6 mm
Rim Diameter: 19 in 482.6 mm

Rim Width Range: 7.5 - 9 in
Rim Width Range: 8 - 9.5 in
Rim Width Range: 8.5 - 10 in

Overall Diameter: 26.68 in 677.67 mm
Overall Diameter: 26.71 in 678.43 mm
Overall Diameter: 27.03 in 686.56 mm

Sidewall Height: 4.34 in 110.23 mm
Sidewall Height: 3.85 in 97.79 mm
Sidewall Height: 4.01 in 101.85 mm

Radius: 13.34 in 338.83 mm
Radius: 13.35 in 339.09 mm
Radius: 13.51 in 343.15 mm

Circumference: 83.81 in 2128.7 mm
Circumference: 83.91 in 2131.3 mm
Circumference: 84.91 in 2156.7 mm

Revs per Mile: 779.6
Revs per Mile: 778.7
Revs per Mile: 769.5

Actual Speed: 60 mph 100 km/h
Speedometer1: 59.9 mph 99.8 km/h
Speedometer1: 59.2 mph 98.7 km/h

Speedometer Difference: -
Speedometer Difference: 0.115% too slow
Speedometer Difference: 1.312% too slow

Help! need to buy a new set of rubbers, dont know which size would suit me better.

Thanks in advnace,

Kam

 

245/40/19

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So less contact patch/smaller diamater?

Kam

 

Depends on what size is your 19" wheels.

 

Also good for 19X8?? 40 offset?

 

My RIMS are the 19" NISMO gunmetals with the 8.5 width.

Thanks,

Kam