My Tire Guide

245/40R17 tire size

A 245/40R17 tire stands 24.7 inches tall and 9.6 inches wide, with a 3.9-inch sidewall on a 17-inch rim.

24.7″OVERALL 24.7 IN · RIM 17 IN9.6″3.9″WIDTH · SIDEWALL
Overall height
24.7 in628 mm
Section width
9.6 in245 mm
Sidewall height
3.9 in98 mm
Rim diameter
17 in432 mm
Circumference
77.6 in1972 mm
Revolutions per mile
816507 per km
Inch size
24.7x9.6R17

Compare it with any other size in the tire size calculator.

Sizes you can swap to

These 17-inch sizes are within two width steps and 3% of a 245/40R17's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 225/45R17, 1.0% taller (0.26 in). Wider sizes also need room in the wheel well and a rim width that suits them.

SizeHeightWidthAt 60 mph
225/45R17+1.0%+0.26 in−20 mm60.6 mph
235/40R17−1.3%−0.31 in−10 mm59.2 mph
255/40R17+1.3%+0.31 in+10 mm60.8 mph
265/35R17−1.7%−0.41 in+20 mm59.0 mph
235/45R17+2.5%+0.61 in−10 mm61.5 mph
225/40R17−2.5%−0.63 in−20 mm58.5 mph
265/40R17+2.5%+0.63 in+20 mm61.5 mph
255/35R17−2.8%−0.69 in+10 mm58.3 mph

Plus and minus sizes

Changing rim size means changing the sidewall to keep the same overall height. On 15-inch or 16-inch or 18-inch or 19-inch rims, these are the closest matches to a 245/40R17.

SizeHeightWidthAt 60 mph
225/55R15+0.1%+0.03 in−20 mm60.1 mph
245/45R16−0.1%−0.04 in±0 mm59.9 mph
245/35R18+0.1%+0.04 in±0 mm60.1 mph
215/35R19+0.8%+0.21 in−30 mm60.5 mph

Other 17-inch sizes near 245/40R17

245 mm wide, other sidewalls

40 series, other widths

See the other sizes for this rim on 17-inch tire sizes.

Shop 245/40R17 tires

These open each store's own list of 245/40R17 tires, where you can filter by type, load and speed rating.

245/40R17 questions

How tall is a 245/40R17 tire?

About 24.7 inches (628 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.

What does 245/40R17 mean?

245 is the section width in millimetres (9.6 in). 40 means the sidewall is 40% of that width: 98 mm, or 3.9 in. R means radial construction, and 17 is the rim diameter in inches.

Can I use 225/45R17 instead of 245/40R17?

225/45R17 is 1.0% taller (0.26 in) and 20 mm narrower, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.6 mph.

What is 245/40R17 in inches?

In inch terms it is 24.7x9.6R17: 24.7 inches tall, 9.6 inches wide, for a 17-inch rim.

How many revolutions per mile does a 245/40R17 make?

About 816 turns per mile, worked out from its unloaded circumference of 77.6 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.