TIRE O-RINGS
Rims for tubeless OTR tire require the use of an O-ring, which is also referred to as a “seal ring”.
O-ring forms an air-tight seal between separate parts of the rim. It must be used properly. It is very important to note that even if rim diameters are the same, different size of O-rings may be necessary depending on the type of rim used.
Here is how is O-ring is fitted:
Cautions with tire O-rings
☞ Do not use used or damaged O-rings.
☞ Clan rim and then lubricate with vegetable oil before mounting the O-ring.
☞ Take caution not to damage O-ring with tire lever. Avoid twisting.
☞ Keep spare O-rings on hand for emergencies. A 20% backup rate is recommended.
☞Ask us for advices
Tire O-ring Size Identifications
OR 325 T
OR–Indicates that the ring is for off-the-road tires.
3–Cross section diameter of ring (in eights of an inch)
25–Rim diameter (Bead diameter in inches)
T–Type of rim (Full tapered bead sat rim)
| O-RING Size | RIM | TIRE | SECTION DIAMETER | INSIDE CIRCUMFERENCE | ||
| MM | INCH | MM | INCH | |||
| OR224TG | 24‘’SDC | 24” rim | 6.70 | 0.26 | 1768.00 | 69.61 |
| OR225T | 25”SDC | 14.00-25 and under | 6.70 | 0.26 | 1802.00 | 70.94 |
| 25”TB | 17.5-25 and under 20.5-25 and under | |||||
| OR325T | 25”TB | 16.00-25 and over 20.5-25 over | 9.80 | 0.39 | 1800.00 | 71.06 |
| OR329T | 29”TB | 29”rim | 9.80 | 0.39 | 2127.00 | 83.74 |
| OR333T | 33”TB | 33”rim | 9.80 | 0.39 | 2447.00 | 96.34 |
| OR335T | 35”TB | 35”rim | 9.80 | 0.39 | 2560.00 | 100.79 |
| OR339T | 39”TB | 39”rim | 9.80 | 0.39 | 2868.00 | 112.91 |
| OR345T | 45”TB | 45”rim | 9.80 | 0.39 | 3311.00 | 130.35 |
| OR349T | 49”TB | 49”rim | 9.80 | 0.39 | 3572.00 | 140.63 |
| OR451T | 51”TB | 51”rim | 12.70 | 0.50 | 3666.00 | 144.33 |
| OR457T | 57”TB | 57”rim | 12.70 | 0.50 | 4103.00 | 161.54 |
