superdenso

Do I need to be concerned about damaging my wheels when going with 255/35/20 instead of 245/40/20?

FastFord

Listed below are some stats...since you are in the < 3% range you should be fine. That being said, pot holes are that much closer to the rim.


Stock Tire Size - 245/40R20ImperialMetricSection Width:
9.65 in
245.00 mm
Rim Diameter:
20 in
508 mm
Rim Width Range:
8 - 9.5 in
Overall Diameter:
27.72 in
704.00 mm
Sidewall Height:
3.86 in
98.00 mm
Radius:
13.86 in
352.00 mm
Circumference:
87.07 in
2,211.68 mm
Revs per Mile:
750.45/mi
Actual Speed:
62.14 mph
100.00 km/h
Speed Variance:
-
Diameter Variance:
-
SHOW TIRES AVAILABLE
Tire Size 1 - 255/35R20ImperialMetricSection Width:
10.04 in
255.00 mm
Rim Diameter:
20 in
508 mm
Rim Width Range:
8.5 - 10 in
Overall Diameter:
27.03 in
686.50 mm
Sidewall Height:
3.51 in
89.25 mm
Radius:
13.51 in
343.25 mm
Circumference:
84.91 in
2,156.70 mm
Revs per Mile:
769.58/mi
Speedometer Reading:
63.72 mph
102.55 km/h
Speed Variance:
2.55% too fast.
Diameter Variance:
-2.49%
SHOW TIRES AVAILABLE