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Bridgestone Motorcycle North America

Bridgestone Motorcycle North America. Basic Motorcycle Tire Information Norris “T.J.” Tennent Motorsports Project Manager. Work Hard! Have fun! Have Passion! Enjoy Life!. O.K. get your minds out of the gutter and Let’s Talk Tires!!!. Bias Ply.

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Bridgestone Motorcycle North America

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  1. Bridgestone Motorcycle North America Basic Motorcycle Tire Information Norris “T.J.” Tennent Motorsports Project Manager

  2. Work Hard! Have fun! Have Passion! Enjoy Life!

  3. O.K. get your minds out of the gutter and Let’s Talk Tires!!!

  4. Bias Ply The drawbacks of using Bias-Ply Technology: • In bias-ply tires the tread & sidewalls share the same casing plies • All sidewall flexing is transmitted to the tread, resulting in: • deformation in the tread contact patch • friction with the ground • rapid wear • reduced traction • higher fuel consumption

  5. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE • Not all components are in all tires. Cap ply Belt plies Tread Shoulder inserts Cord body Innerliner Sidewall Bead bundles Beadfiller

  6. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE Innerliner The innerlineris a rubber compound bonded to the inside of the cord body that retains air under pressure. It has no cord reinforcing and functions as an innertube in a tubeless tire.

  7. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE Bead Bundles • Tire bead bundlesare large copper, brass, or bronze plated high tensile steel cords wound together. Tire beads occasionally include some type of fabric wrap to retain the bead shape prior to the curing process. The body plies of the tire are looped around the bead bundles to hold the plies in place. The bead holds the tire on the rim.

  8. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE Bead Filler • Thebead filleris a hard rubber compound used to provide stability to the lower sidewall and bead area.

  9. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE Cord Body [ tire casing ] • The cord bodyprovides tire strength and transmits cornering forces from the tread to the wheel. Rubber coated cord, called body plies, make up the cord body. Body plies can be polyester, rayon, or nylon. Polyester is the most common cord body. The area of the body ply that wraps around the bead is called the turn up.

  10. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE Sidewall • Thesidewallis the area of a tire from the bead to the tread. It forms a protective covering for the cord body. Sidewall rubber compounds resist aging, cracking, cutting, and snagging, and contain sidewall treatments such as white lettering.

  11. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE Belt Plies [ package or system ] • Belt pliesare two or more strong layers of cord under the tread area. The main function of the belt system is to provide stability to the tread area of the tire. They assist in improving tire mileage, impact resistance, and traction by giving the tread area extra strength and stability. The most common cord material used in the belt plies is steel.

  12. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE Cap Ply • The cap plyalso found in some tires is similar to belt edge strips only full width instead of just on the belt edges. These components may be used for a number of reasons, but most commonly to enhance high speed performance.

  13. CORE TIRE KNOWLEDGE Tire Components chapter 1 2 3 4 5 PARTS OF A TIRE Tread • The treadis the portion of the tire in contact with the road surface. The tread compound and shape are designed to optimize the wear, traction, handling, fuel economy, and cut resistance characteristics of the tire given the tire’s intended use.

  14. CORE TIRE KNOWLEDGE Tire Dimensions chapter 1 2 3 4 5 TIRE AND RIM DIMENSIONS These are the basic tire dimension terms. • Tread Width • Section Width • Section Height • Overall Diameter • Static Loaded Radius • Aspect Ratio [profile or series]

  15. CORE TIRE KNOWLEDGE Tire Dimensions chapter 1 2 3 4 5 TIRE AND RIM DIMENSIONS Tread Width • The tread widthis the distance from outer edge to outer edge of the tread. You can estimate differences between the existing and the replacement tires by comparing the tread widths. You can estimate changes in fender well and frame clearances by dividing the tread width differences between the existing tire and the replacement tire by two. TREAD WIDTH

  16. CORE TIRE KNOWLEDGE chapter 1 2 3 4 5 Tire Dimensions TIRE AND RIM DIMENSIONS Section Width The section widthis the width of a new tire when mounted on the tire’s measuring rim, including normal sidewalls but not including protective side ribs, bars, raised letters, or decorations. You can estimate the width differences between the existing and replacement tires by comparing the overall section widths. You can estimate changes in sidewall to fender well, frame, and suspension clearances by dividing the overall section width differences between the existing tire and the replacement tire by two. TREADWIDTH SECTION WIDTH

  17. CORE TIRE KNOWLEDGE chapter 1 2 3 4 5 Tire Dimensions TIRE AND RIM DIMENSIONS Section Height The section heightof a new tire is the distance from the rim vertically to the highest point of the unloaded tread area. TREAD WIDTH SECTION HEIGHT SECTION WIDTH

  18. CORE TIRE KNOWLEDGE chapter 1 2 3 4 5 Tire Dimensions TIRE AND RIM DIMENSIONS Aspect Ratio [profile or series] 75 SERIES The aspect ratio, also known as theprofile or series, is the ratio of the section height to the section width. For example, a 75 series tire is approximately 75 as high as it is wide. Lower aspect ratio tires, such as 60 series, generally offer performance advantages over higher aspect ratio tires, such as 70 or 75 series. They provide more responsive handling, more stability, and better high-speed capabilities. Height = 75% of Width 70 SERIES 60 SERIES

  19. CORE TIRE KNOWLEDGE Tire Dimensions chapter 1 2 3 4 5 TIRE AND RIM DIMENSIONS Overall Diameter • The overall diameterof a tire is the distance from tread surface to tread surface while inflated but not loaded. It is twice the section height plus the nominal rim diameter. You can estimate the height difference between the existing and replacement tires by comparing the overall tire diameters. You can estimate changes in the tire to fender well clearance and vehicle ground clearance by comparing the radiuses (diameter divided by 2 = radius) of the two tires. SECTION HEIGHT OVERALL DIAMETER RIM DIAMETER

  20. CORE TIRE KNOWLEDGE Tire Dimensions chapter 1 2 3 4 5 TIRE AND RIM DIMENSIONS Static Loaded Radius • The static loaded radiusis the distance from the center of the axle to the contact surface when a prescribed load is applied to a tire mounted on the measuring rim and inflated to the recommended pressure. SECTION HEIGHT OVERALL DIAMETER RIM DIAMETER STATIC LOADED RADIUS

  21. CORE TIRE KNOWLEDGE chapter 1 2 3 4 5 Additional Tire Sidewall Information TIRE SIDEWALLINFORMATION Maximum Load and Inflation Pressure The maximum loadindicates the load capacity for a tire. Theinflation pressureindicates the maximum air pressure.

  22. CORE TIRE KNOWLEDGE The last four digits should be your concern! The first two digits are the week that the tire was produced and the last two digits are the year the tire was produced! DOT XX XX XXX 2007 This is important because your warranty is good for four years from the DOT date or four years from the date of purchase up to 7 years! chapter 1 2 3 4 5 Additional Tire Sidewall Information TIRE SIDEWALLINFORMATION The Department of Transportation [DOT] Code The Department of Transportation[DOT] Code is a serial number that denotes specific manufacturing information about the tire. The serial number includes the DOT label, the manufacturer and plant code, the tire size code, optional symbols from the manufacturer, and the date of manufacture.

  23. Technical Topics • Changing tire fitment • Towing Trailers • Dealers and Sales Reps need more tire knowledge • Cupping on front tires (heavier bikes) • Wear on one side of the tire • Tires mounted backwards • Nitrogen vs. Compressed air • Tire Mileage • Warranty

  24. Changing Tire Fitment • 1) Tires marked “Front Tire” or “Rear Tire” should be mounted only in their stated wheel positions. • 2) Some motorcycle wheel positions may only be fitted with radial, bias, or bias belted tires. Consult owners manual, local dealer, or Tire Manufactures Technical center for the correct tire/wheel combination for your vehicle. • 3) Switching from Radial to Bias or Tube Type to Tubeless • Towing Trailers • 1)Towing trailers behind your motorcycle may contribute to motorcycle instability. It may also cause tire stress through overload. This overloaded condition could cause damage to the tire which could result in a sudden tire failure and/or accident. Most tire manufactures do not warranty tires fitted on motorcycles fitted with trailers • 2) Sidecars should not be fitted to motorcycles without approval from your vehicle manufacturer. If approval is obtained for sidecar fitment to your vehicle, the tire manufacturer should be consulted, before fitment, to ensure proper tire fitment and load caring capacity

  25. BMW K1200LT 58V is equal to max load is 520lbs at 42psi at 149MPH 79V is equal to max load is 963lbs at 48psi at 149MPH

  26. GL1800LT 63H is equal to max load is 600lbs at 41psi at 130MPH 74H is equal to max load is 827lbs at 41psi at 130MPH

  27. 501/827 482/832 462/823 438/788 482/838 453/821 451/737 449/717 440/726 449/798 Max load at max air pressure (41psi) is 827lbs with stock parts and rider and passenger average weights of 200 and 120lbs Max load at max air pressure (48psi) is 963lbs with stock parts and rider and passenger average weights of 200 and 120lbs

  28. You’re still at 430lbs towing Stopping weight! You’re still at 290lbs towing Stopping weight!

  29. If you just have to tow…..use a trike. The tires have the load carrying capacity!

  30. Dealers and Sales Reps need more tire knowledge 1) Dealers have limited or no knowledge of how the motorcycle tire warranty system works. 2) Working with the larger distributors to increase dealer tire knowledge 3) Seminars like this will increase consumer knowledge • Cupping on front tires (heavier bikes) 1) Three reasons A. 90%-Air Pressure-Air Pressure- Air Pressure B. 8%-Mechanical C. 2%-Tire tread design • Wear on one side of the tire 1) Always alignment related (same as on your 4 wheeled vehicle)

  31. Tires Mounted Backwards 1) Tires have a directional arrow on them for a reason • Nitrogen vs. Compressed air ProsCons N2 is always Drier Usually costs money N2 helps tire run cooler Not always available N2 is good for higher speeds What percentage N2 C.A. is readily available Sometimes very wet C.A. is as good as N2 when Very hard to get in dry dry condition.

  32. Tires Mileage 1) Why can’t I get 30 or 40 thousand miles out of my motorcycle tires 2) The application, compound, and the footprint 3) The rider, the type of bike, maintenance on the bike, the type of tire, how much air pressure, the ambient temperature, the road surface temperature, type of road surface, demographics (location), whewwwwww! • Warranty 1) Consult your dealer 2) Consult your tire manufacturer 3) Consult your vehicle manufacturer 4) Most tire manufacture's have a basic warranty for workmanship and materials 5) Engineers want to know if you are having a tire problem 6) Because of the “Tread Act” no one can “just send you a tire”. 7) Though “forums” are O.K. for you to vent, they don’t allow the manufacturer to investigate a tire problem. We have to see the tire with the problem to determine what is wrong with the tire.

  33. Questions??? • Thank You

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