What is a tire o-ring and how it works?
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|
|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|