Motorcycle Tire Reference

[Jack Klarich]

Some handy info



Tire Conversion Charts

Motorcycle Street Tire Size Conversion Chart
Front Tires
Metric	Alpha	Inch
80/90	MH	2.50/2.75
90/90	MJ90	2.75/3.00
100/90	MM90	3.25/3.50
110/90	MN90	3.75/4.00
120/80	N/A	4.25/4.50
120/90	MR90	4.25/4.50
130/90	MT90	5.00/5.10
Rear Tires
Metric	Alpha	Inch
110/90	MP85	4.50/4.75
120/90	MR90	4.50/4.75
130/80	N/A	5.00/5.10
130/90	MT90	5.00/5.10
140/80	N/A	5.50/6.00
140/90	MU90	5.50/6.00
150/80	MV85	6.00/6.25
150/90	MV85	6.00/6.25
N/A
Motorcycle Off-Road Tire Size Conversion Chart
Front Tires
Metric	Alpha	Inch
60/100	90/80	2.50/2.75
70/100	90/90	2.75/3.00
80/100	100/80	3.00/3.25
Rear Tires
Metric	Alpha	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

Size Types









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

Load Indexes (L.I.)

L.I.	lbs.		L.I.	lbs.		L.I.	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

[TomyJ]

Thank You JK for this super information, I spend 3 hours at the best tire shop in Long Beach Ca. for a 18"X9" HD rim, Need rear tire to clear the swing arm, chain and disc system Boy did that salesman get a super review from me.Attachment 112006.Attachment 112007