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Sidewall

155/70R17

155 mm across the tread, a sidewall 70% of that — 109 mm — on a 17-inch rim. That puts the whole wheel at 25.5 inches tall.

109 mm sidewall649 mm · 25.5"
Sidewall
4.27"
109 mm
Overall
25.5"
648.8 mm
Circumference
80.2"
2.038 m
Revs per mile
790
per minute at 60 mph

What it needs to sit on

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It mounts on a rim between 4" and 5.5" wide, and the tread follows the rim: roughly 5 mm of section width for every half-inch, so about 148 mm across at the narrow end and 163 mm at the wide one. Written the way lift kits and wheel wells are, it is a 25.5×6.1R17 — tall by wide, in inches.

What goes wrong on this size

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

2 of them name what let go, and it is most often tread separation. Shinko is named more than any other brand.

What let goComplaints
tread separation2

Where the wheel is named, 2 of 2 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
145/75R1725.6" +0.1 %+0.3 mm60.0 mphside by side
135/80R1725.5" -0.2 %-0.5 mm59.9 mphside by side
175/60R1725.3" -1.1 %-3.5 mm59.4 mphside by side
175/65R1726.0" +1.6 %+5.3 mm61.0 mphside by side
145/70R1725.0" -2.2 %-7.0 mm58.7 mphside by side
135/75R1725.0" -2.2 %-7.3 mm58.7 mphside by side
145/80R1726.1" +2.3 %+7.5 mm61.4 mphside by side
155/65R1724.9" -2.4 %-7.8 mm58.6 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.


185/65R16120 mm sidewall — 11% more
135/70R1895 mm sidewall — 13% less
175/70R16123 mm sidewall — 13% more
145/65R1894 mm sidewall — 13% less
125/75R1894 mm sidewall — 14% less
165/75R16124 mm sidewall — 14% 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
145/75R1730.0 mph50.0 mph70.1 mph10,008
135/80R1730.0 mph49.9 mph69.9 mph9,985
175/60R1729.7 mph49.5 mph69.2 mph9,892
175/65R1730.5 mph50.8 mph71.1 mph10,162
145/70R1729.4 mph48.9 mph68.5 mph9,784