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Sidewall

305/65R17

305 mm across the tread, a sidewall 65% of that — 198 mm — on a 17-inch rim. That puts the whole wheel at 32.6 inches tall.

198 mm sidewall828 mm · 32.6"
Sidewall
7.81"
198 mm
Overall
32.6"
828.3 mm
Circumference
102.4"
2.602 m
Revs per mile
618
per minute at 60 mph

What it needs to sit on

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It mounts on a rim between 8.5" and 11" wide, and the tread follows the rim: roughly 5 mm of section width for every half-inch, so about 293 mm across at the narrow end and 318 mm at the wide one. Written the way lift kits and wheel wells are, it is a 32.6×12.0R17 — tall by wide, in inches.

What goes wrong on this size

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3 drivers have filed a complaint. 0 of them ended in a crash, and nobody was hurt. Nobody died.

3 of them name what let go, and it is most often crack. B.f.goodrich is named more than any other brand.

What let goComplaints
crack2
blowout1

Where the wheel is named, 3 of 3 were on the rear, and 0 on the front.

What fits instead

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Same 17-inch rim, height within 3%. Past that the speedometer starts lying and things begin to rub.


SizeHeightRide heightSpeedo reads 60, you doCompare
285/70R1732.7" +0.3 %+1.3 mm60.2 mphside by side
325/60R1732.4" -0.8 %-3.3 mm59.5 mphside by side
295/65R1732.1" -1.6 %-6.5 mm59.1 mphside by side
315/65R1733.1" +1.6 %+6.5 mm60.9 mphside by side
295/70R1733.3" +2.0 %+8.3 mm61.2 mphside by side
315/60R1731.9" -2.2 %-9.3 mm58.7 mphside by side

Same height, different rim

Bigger rim, same overall height. Sharper steering, harsher ride, and far less rubber between your wheel and the next pothole.


285/65R18185 mm sidewall — 7% less
335/55R18184 mm sidewall — 7% less
305/60R18183 mm sidewall — 8% less
285/75R16214 mm sidewall — 8% more
315/60R18189 mm sidewall — 5% less
295/70R16207 mm sidewall — 4% more

If you fit something taller

A taller tire covers more ground per turn, so the needle reads low and the odometer counts short. Over ten thousand miles on the dial, the last column is what you really drove.


Fitted insteadReads 30Reads 50Reads 70Real miles per 10,000 shown
285/70R1730.1 mph50.2 mph70.2 mph10,030
325/60R1729.8 mph49.6 mph69.5 mph9,922
295/65R1729.5 mph49.2 mph68.9 mph9,843
315/65R1730.5 mph50.8 mph71.1 mph10,157
295/70R1730.6 mph51.0 mph71.4 mph10,199