130/60-R21 tires are 0.47 inches (12 mm) smaller in diameter than 120/70-R21 tires and the speedometer difference is 1.7%
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120/70-R23 tires are 2.47 inches (62.8 mm) larger in diameter than 130/60-R21 tires and the speedometer difference is 8.3%
Missing: 70r21- | Show results with:70r21-
120/50-R21 tires are 1.42 inches (36 mm) smaller in diameter than 130/60-R21 tires and the speedometer difference is 5.2%
Missing: 70r21- | Show results with:70r21-
140/60-R21 tires are 0 inches (0 mm) smaller in diameter than 120/70-R21 tires and the speedometer difference is 0.0%
120/65-R21 tires are 0 inches (0 mm) smaller in diameter than 130/60-R21 tires and the speedometer difference is 0.0%
Missing: 70r21- | Show results with:70r21-
120/20-R21 tires are 4.25 inches (108 mm) smaller in diameter than 130/60-R21 tires and the speedometer difference is 15.7%
Missing: 70r21- | Show results with:70r21-
140/75-R21 tires are 2.13 inches (54 mm) larger in diameter than 130/60-R21 tires and the speedometer difference is 7.3%
Missing: 70r21- | Show results with:70r21-
90/70-R21 tires are 1.65 inches (42 mm) smaller in diameter than 120/70-R21 tires and the speedometer difference is 6.0%
Missing: 60r21 | Show results with:60r21
130/90-R16 tires are 1.93 inches (49 mm) smaller in diameter than 130/60-R21 tires and the speedometer difference is 7.1%
Feb 11, 2021 · Wheels/Tires - 120/70-21 versus 130/60-21 - Swapping out the front on my 2009 FXSTC for a 2013-2017 Breakout 21 x 3.5.