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290 TECHNICAL INFORMATION CONVERSION CHART FOR STREET TIRES Street tire size designation Metric designation 130 / 90 - 16 67 H Speed Rating Load Rating Rim Diameter (inches) Aspect Ratio (90%) Section Width (mm) Inch designation 5.00 H 16 4PR Casing Strength(ply rating) Rim Diameter Speed Rating Section Width (inches) Alphabetical designation M T 90 -16 Load Range B Load Range Rim Diameter (inches) Aspect Ratio (90%) Tire Width Code Motorcycle code Speed rating chart Tire Dimensions Width offroad Metric Alpha Inches Rim Maximum Design/ Test Speed Type MPH KM/H B 31 50 C 37 60 D 40 65 E 43 69 F 50 80 G 56 90 J 62 100 K 68 110 L 75 120 M 81 130 N 87 140 P 94 150 Q 99 160 R 106 170 S 112 180 T 118 190 U 124 200 H 130 210 V 149 240 (V) or Z >149 240+ Z 149+ 240+ W 168 270 (W) >168 270+ Y 186 305 Z or (V) >149 240+ Motorcycle Use Tires with 2.00, 2.25 & 2.50 nominal section widths are rated for 75 mph. width Load index rating chart Load Rating - a numerical code which corresponds to the total carrying capacity at the speed indicated by the speed symbol. Aspect Ratio = Section Height Section Width x 100 Tire Inflation Always keep the motorcycle manufacturer’s recommended air pressure in both tires. This is an important requirement for tire safety and mileage. Your motorcycle owner’s manual will tell you the recommended cold inflation pressure. On some motorcycles, the recommended front and rear tire pressures will be different. The pressures stamped on the sidewall of the tire are only for maximum loads. On some occasions, these pressures will also be the manufacturers recommended settings as well. Riding on tires with too little air pressure is dangerous. The tires will build excessive heat. This can cause a sudden tire failure that could lead to serious personal injury or death. Under inflation may also: 1. Damage the tire leading to tire failure 2. Adversely affect vehicle cornering 3. Reduce tire life 4. Increase fuel consumption 5. Fatigue cracking Typically at the end of a tire description you’ll find the letters “TT” or “TL”. • TT = Tube Type • (BW = Black Wall Tire) • TL = Tubeless • (WW = White Wall Tire) Dimensional equivalencies and conversions All types of diagonal achitecture tires Metric Alpha Inches Rim width 50/100 2.00 120/80 MR90 4.25-4.50-4.60 4.25/4.85 60/100 2.25 120/90 MS90 4.25-4.50 5.10 70/100 MG90 2.5 130/80 4.50-4.60-5.10 80/80 MH90 2.75 3.60 130/90 MT90 4.50-4.60-5.10 5.10 80/90 MJ90 2.75-3.00 3.60 140/80 4.50-5.10-5.50 90/90 ML90 3.00-3.25-3.60 4.10 140/90 MU90 5.10-5.50 100/90 MM90 3.50-4.00 4.10 150/90 MV90 6.00 110/80 MN90 4.00-4.10-4.60 4.60 160/90 6.25 110/90 MP90 4.25 4.25/4.85 The width of street tires is measured at the level of the base of the thread blocks. The width of offroad tires is measured at the level of the widest point at the top of the thread blocks. How to read a motorcycle tire sidewall Diameter of wheel in inches. Load range symbol maximum load and corresponding inflation pressure. U.S. Dot safety standard serial identification code. First two digits indicate week of year tire was manufactured. After 01/100, the number of date code digits increases from 3 to 4, and the last two digits indicate decade & year tire was manufactured. Front wheel fitment instruction Tire ply and composition materials used. Before 01/100, last digit indicates year tire was manufactured. Tubeless designation size expression Width of tire in millimeters Ration of height to width (Aspect ratio) Load index and speed symbol Index LBS Kilo 20 176 80 21 182 83 22 187 85 23 193 87 24 198 89 25 204 92 26 209 95 27 215 97 28 220 99 29 227 103 30 234 106 31 240 109 32 247 112 33 254 115 34 260 118 35 267 121 36 276 125 37 282 128 38 291 132 39 300 136 40 309 140 41 320 145 42 331 150 43 342 155 44 353 160 45 364 165 46 375 170 Index LBS Kilo 47 386 175 48 397 180 49 408 185 50 419 190 51 430 195 52 441 200 53 454 206 54 467 212 55 481 218 56 494 224 57 507 230 58 520 236 59 536 243 60 551 250 61 567 257 62 584 265 63 600 272 64 617 280 65 639 290 66 661 300 67 677 307 68 694 314 69 717 325 70 739 335 71 761 345 72 783 355 73 805 365 Index LBS Kilo 74 827 375 75 853 387 76 882 400 77 908 412 78 937 425 79 963 437 80 992 450 81 1019 462 82 1047 475 83 1074 487 84 1102 500 85 1135 515 86 1168 530 87 1202 545 88 1235 560 89 1279 580 90 1323 600 91 1356 615 92 1389 630 93 1433 650 94 1477 670 95 1521 690 96 1565 710 97 1609 730 98 1653 750 99 1709 775 Rim width Height Width Street


2017roadiron-cruiser_en
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