How To Order:
Before ordering, check tire size found on current tire sidewall or as listed in owner's manual, then order the same size tire. If ordering a wider tire, be sure to allow sufficient clearance and check the manufacturer's Recommended Rim Widths (RRW) and Load Ratings (LR) to help determine which tire is best.

Recommended Rim Widths (RRW) is specified in inches.

Load Ratings (LR) is given in pounds for each tire (based on a tire inflated to the psi indicated on sidewall).  Add front and rear load ratings to determine TOTAL for cycle.

Ply Ratings (PR) as shown on the tire.  These are also know as ply figures, and are not actual ply construction.

Standard Sizing is Tire Width x Rim Diameter.

Metric Sizing is Tire width in millimeters/Sidewall Height as a percent of tire width x Rim Diameter in inches.

Metric Designation

                                                          Inch Designation

 

This is General Information Only, Some Manufactures are different

Motorcycle Speed Ratings

Speed Symbol	Max Speed	Speed Symbol	Max Speed	Speed Symbol	Max Speed
J	62 mph	K	68 mph	L	75 mph
M	81 mph	N	87 mph	P	93 mph
Q	99 mph	R	106 mph	S	112 mph
T	118 mph	U	124 mph	H	130 mph
V	149 mph	W	168 mph	Y	186 mph

H Rated tires are normally for Tour Bikes, V And Z are normally for Sport Bikes and R and S are normally for Dual Sport Bikes

Load Ratings (LR.)

Load Index	Max. Lbs.	Load Index	Max. Lbs.	Load Index	Max. Lbs.
33	254	49	408	65	639
34	260	50	419	66	661
36	276	52	441	68	694
37	282	53	454	69	716
38	291	54	467	70	739
39	300	55	481	71	761
40	309	56	494	72	783
41	320	57	507	73	805
42	331	58	520	74	827
43	342	59	536	75	853
44	353	60	551	76	882
45	364	61	567	77	908
46	375	62	584	78	937
47	386	63	600	79	963
48	397	64	617	80	992

 

Off-Road Tire Size Conversion Chart

Front Tires	Metric	Old Metric	Inch
	60-100	90-80	2.50-2.75
	70-100	90-80	2.75-3.00
	80-100	100-80	3.00-3.25
Rear Tires	Metric	Old Metric	Inch
	80-100	80-90	2.50-3.60
	90-100	110-90	3.60-4.10
	100-100	120-80	4.00-4.10
	110-100	130-80	4.00-4.50
	120-100	140-80	5.00-5.10

Motocross Tire Size Applications

Motocross Bike Engine CC Size	Front	Rear
50	2.50-10	2.50-10
60	2.50-14	80-100-12
80	70-100-17	90-100-14
80-100	70-100-19	90-100-16
100-125	80-100-21	100-100-18 or 100-90-19
250	80-100-21	110-100-18 or 110-90-19
500	80-100-21	120-100-18 or 120-90-19

Bridgestone Tires Cap/base and DTC Information

MX CAP/BASE
Newly developed MX CAP/BASE combines superior shock absorption with ultra-high traction. Specially designed for front tires, the tire features a dual layer of rubber construction. The base compound ensures tread block rigidity needed for high traction. The softer surface compound delivers high levels of cushioning and grip.

 

Dual Tread Compound
Dual Tread Compound (DTC) adopted for motocross tires, for high-performance cornering and acceleration.

THE NEXT REVOLUTION IN TIRES - CTDM (Comprehensive Tire Design Method) is a revolutionary method of tire design by Bridgestone. The core of CTDM is a program in the Bridgestone Super computer that automatically designs an optimum tire under a given condition.