255/40-R10 vs 255/40-R20 Tire Comparison

Tire Size Finder (optional):

Stock Sizes

255/75-16

Plus Sizes

255/75-16

Most Calculated Sizes

* Updated hourly; based on tire calculations from the past 7 days

Accepts P-Metric and Inches

Side by side Overlay

255/40r10 vs 255/40r20 Tire Comparison Side By Side

	Current Tire	New Tire	Difference
Diameter inches (mm)	18.03 (458)	28.03 (712)	10 (254) 55.5%
Width inches (mm)	10.04 (255)	10.04 (255)	0 (0) 0%
Circum. inches (mm)	56.65 (1438.85)	88.06 (2236.81)	31.42 (797.96) 55.5%
Sidewall Height inches (mm)	4.02 (102)	4.02 (102)	0 (0) 0%
Revolutions per mile (km)	1118.49 (695)	719.48 (447.06)	-399.01 (-247.93) -35.7%

Forum embed code (copy & paste in your post):

[url=http://www.tacomaworld.com/forum/tirecalc.php?tires=255-40r10-255-40r20][img]http://www.tacomaworld.com/forum/tirecalc/imagestats/255x40xR10-255x40xR20.png[/img][/url]

Speedometer Difference
Speedo Reading	Actual Speed
20 mph (32.19 km/h)	31.09 mph (50.04 km/h)
25 mph (40.23 km/h)	38.86 mph (62.55 km/h)
30 mph (48.28 km/h)	46.64 mph (75.06 km/h)
35 mph (56.33 km/h)	54.41 mph (87.57 km/h)
40 mph (64.37 km/h)	62.18 mph (100.07 km/h)
45 mph (72.42 km/h)	69.96 mph (112.58 km/h)
50 mph (80.47 km/h)	77.73 mph (125.09 km/h)
55 mph (88.51 km/h)	85.5 mph (137.6 km/h)
60 mph (96.56 km/h)	93.28 mph (150.11 km/h)
65 mph (104.61 km/h)	101.05 mph (162.62 km/h)

Speedometer forum embed code:

[url=http://www.tacomaworld.com/forum/tirecalc.php?tires=255-40r10-255-40r20][img]http://www.tacomaworld.com/forum/tirecalc/imagespeedo/255x40xR10-255x40xR20.png[/img][/url]

Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35	2.73	2.94	3.07	3.21	3.31	3.42	3.55	3.73	3.91	4.11	4.27	4.56	4.88	5.13	5.29	5.38	5.71	6.17	7.17
1831	2127	2291	2392	2501	2579	2665	2766	2906	3046	3202	3327	3553	3802	3997	4122	4192	4449	4807	5586

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