21-inch tire size chart

44 sizes fit 21″ wheels, from 26.4″ to 32.9″ tall. Sizes are grouped by the average height their tires are listed at.

26-inch tires on 21-inch rims

1 size whose tires measure 25.5″ to 26.5″ tall on average.

Size	Published height ″	Size code ″	Width ″	Tires
275/25R21	26.40	26.41	10.8	1

6 sizes whose tires measure 26.5″ to 27.5″ tall on average. 27-inch tires on every wheel size

Size	Published height ″	Size code ″	Width ″	Tires
245/30R21	26.80	26.79	9.6	1
295/25R21	26.80	26.81	11.6	2
305/25R21	27.00	27.00	12.0	1
255/30R21	27.10	27.02	10.0	1
265/30R21	27.30	27.26	10.4	1
325/25R21	27.40	27.40	12.8	1

10 sizes whose tires measure 27.5″ to 28.5″ tall on average. 28-inch tires on every wheel size

Size	Published height ″	Size code ″	Width ″	Tires
275/30R21	27.50	27.50	10.8	1
345/25R21	27.60–27.76	27.79	13.6	3
285/30R21	27.76–27.80	27.73	11.2	2
245/35R21	27.76–27.80	27.75	9.6	9
255/35R21	27.99–28.00	28.03	10.0	4
295/30R21	27.99–28.00	27.97	11.6	8
355/25R21	28.00	27.99	14.0	1
305/30R21	28.20–28.23	28.20	12.0	6
265/35R21	28.30–28.31	28.30	10.4	9
315/30R21	28.46–28.50	28.44	12.4	13

12 sizes whose tires measure 28.5″ to 29.5″ tall on average. 29-inch tires on every wheel size

Size	Published height ″	Size code ″	Width ″	Tires
275/35R21	28.50–28.60	28.58	10.8	24
325/30R21	28.70	28.68	12.8	15
245/40R21	28.70	28.72	9.6	6
285/35R21	28.86–28.90	28.85	11.2	3
335/30R21	28.90	28.91	13.2	5
225/45R21	28.90–28.94	28.97	8.9	2
255/40R21	29.00–29.02	29.03	10.0	16
295/35R21	29.09–29.10	29.13	11.6	17
345/30R21	29.20	29.15	13.6	2
265/40R21	29.30–29.33	29.35	10.4	15
235/45R21	29.30–29.33	29.33	9.3	5
305/35R21	29.41	29.41	12.0	1

8 sizes whose tires measure 29.5″ to 30.5″ tall on average. 30-inch tires on every wheel size

Size	Published height ″	Size code ″	Width ″	Tires
245/45R21	29.60–29.70	29.68	9.6	4
275/40R21	29.60–29.70	29.66	10.8	6
315/35R21	29.60–29.70	29.68	12.4	5
255/45R21	30.00–30.04	30.04	10.0	5
285/40R21	29.96–30.20	29.98	11.2	5
235/50R21	30.28	30.25	9.3	3
295/40R21	30.28–30.30	30.29	11.6	10
265/45R21	30.30–30.40	30.39	10.4	11

5 sizes whose tires measure 30.5″ to 31.5″ tall on average. 31-inch tires on every wheel size

Size	Published height ″	Size code ″	Width ″	Tires
305/40R21	30.59	30.61	12.0	1
275/45R21	30.70–30.90	30.74	10.8	16
315/40R21	30.90–31.00	30.92	12.4	7
255/50R21	31.00–31.10	31.04	10.0	4
285/45R21	31.00–31.10	31.10	11.2	8

1 size whose tires measure 31.5″ to 32.5″ tall on average. 32-inch tires on every wheel size

Size	Published height ″	Size code ″	Width ″	Tires
275/50R21	31.80–31.90	31.83	10.8	7

1 size whose tires measure 32.5″ to 33.5″ tall on average. 33-inch tires on every wheel size

Size	Published height ″	Size code ″	Width ″	Tires
275/55R21	32.90	32.91	10.8	1