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

O-ring Sizes

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
O-RING Size	RIM	TIRE	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
OR225T	25”TB	17.5-25 and under 20.5-25 and under	6.70	0.26	1802.00	70.94
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

Tire School

TIRE O-RINGS

Cautions with tire O-rings

Tire O-ring Size Identifications

OR 325 T