My Tire Guide

305/45R17 tire size

A 305/45R17 tire stands 27.8 inches tall and 12.0 inches wide, with a 5.4-inch sidewall on a 17-inch rim.

27.8″OVERALL 27.8 IN · RIM 17 IN12.0″5.4″WIDTH · SIDEWALL
Overall height
27.8 in706 mm
Section width
12.0 in305 mm
Sidewall height
5.4 in137 mm
Rim diameter
17 in432 mm
Circumference
87.4 in2219 mm
Revolutions per mile
725451 per km
Inch size
27.8x12.0R17

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 305/45R17's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 295/45R17, 1.3% shorter (0.35 in). Wider sizes also need room in the wheel well and a rim width that suits them.

SizeHeightWidthAt 60 mph
295/45R17−1.3%−0.35 in−10 mm59.2 mph
315/45R17+1.3%+0.35 in+10 mm60.8 mph
285/50R17+1.5%+0.41 in−20 mm60.9 mph
285/45R17−2.5%−0.71 in−20 mm58.5 mph
295/50R17+2.9%+0.81 in−10 mm61.7 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 305/45R17.

SizeHeightWidthAt 60 mph
295/55R15−0.1%−0.03 in−10 mm59.9 mph
275/55R16+0.4%+0.10 in−30 mm60.2 mph
275/45R18−0.2%−0.06 in−30 mm59.9 mph
315/35R19−0.5%−0.13 in+10 mm59.7 mph

Other 17-inch sizes near 305/45R17

305 mm wide, other sidewalls

45 series, other widths

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

Shop 305/45R17 tires

These open each store's own list of 305/45R17 tires, where you can filter by type, load and speed rating.

305/45R17 questions

How tall is a 305/45R17 tire?

About 27.8 inches (706 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.

What does 305/45R17 mean?

305 is the section width in millimetres (12.0 in). 45 means the sidewall is 45% of that width: 137 mm, or 5.4 in. R means radial construction, and 17 is the rim diameter in inches.

Can I use 315/45R17 instead of 305/45R17?

315/45R17 is 1.3% taller (0.35 in) and 10 mm wider, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.8 mph. Make sure the extra width clears the suspension and fender liner at full lock.

What is 305/45R17 in inches?

In inch terms it is 27.8x12.0R17: 27.8 inches tall, 12.0 inches wide, for a 17-inch rim.

How many revolutions per mile does a 305/45R17 make?

About 725 turns per mile, worked out from its unloaded circumference of 87.4 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.