Below are some sizes of wheel rims which we can supply to you. 

Agricultural Wheel / Tractor Wheel Rim / WDC Wheel Rim / DW Series Steel Wheel Rim
12": 4.00Bx12, 12X4j, , 5.00s-12, 7.00-12, 
13": 13x4 1/ 2J, 13x4J
14": 14x4 1/ 2J
15": 15x6J, 15x5 1/ 2J, 15x6J, 15x8JJ, 7.00T-15
15.3": 9.00x15.3
15.5": 13.00x15.5, 15.5x16.00
16": 16x6 1/ 2J, 16x7J, 16x8J, 11x16
16.5": 16.5x8.25, 16.5x9.75
17": 17x7J, 17x8J, 13x17, 16x17
18": 18x8J, 18xW9, 9x18, 11x18, 13x18
19.5": 19.5x13.00, 19.5x14.00
20": 9.00x20, 11.00x20, 13.00x20, 14.00x20, 16.00x20
20.5": 20.5x14.00, 
22": 8.00x22, 8.00-22
24": 11x24, 13x24, 14x24, 16x24
25": 12.00x25, . 14.00x25
22.5": 22.5x11.75, 22.5x16.00, 22.5x20.00
26.5": 26.5X24.00, 26.5X20.00

W Series
20": W7x20, 20xW7, 20xW8, 20x8J, 20xW9
22": 22x8J
24": 24xW7, 24xW8, 24xW10, 24xW12, 24xW15, 24xW16L, 24xW17
26": 26xW12, 26xW13
28": 28xW10, 28xW11, 28xW12, 28xW13, 28xW14L
30": 30xW12, 30xW14L, 30xW14
32": 32xW10, 32xW8
34": 34xW15, 34xW14L
38": 38xW11, 38xW12, 38xW15L, 38xW16L, 38xW18
48": 48xW7

DW Series Wheel: 
24": DW15Lx24
26": DW20x26, DW25X26
28": DW15Lx28
30": DW14x30
32": DW27x32, DW21X32
34": DW15x34, DW34x15
38": DW11x38, 38xDW11,