Presentation on theme: "Bridgestone Motorcycle North America Basic Motorcycle Tire Information Norris “T.J.” Tennent Motorsports Project Manager."— Presentation transcript:
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!!!
Radial The benefits of using Radial Technology: Outstanding traction due to flat stable crown & larger footprint Better distribution of pressure in footprint resulting in reduced soil compaction & greater flotation Reduced working time due to less tire slip, greater productivity Reduced fuel consumption Longer tread life Comfort & handling on the road 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 Bias Ply
Tire Components chapter PARTS OF A TIRE Not all components are in all tires. Innerliner Bead bundles Beadfiller Cord body Sidewall Shoulder inserts Belt plies Cap ply Tread CORE TIRE KNOWLEDGE
Innerliner The innerliner is 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. chapter PARTS OF A TIRE CORE TIRE KNOWLEDGE Tire Components
Bead Bundles Tire bead bundles are 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. chapter PARTS OF A TIRE CORE TIRE KNOWLEDGE
Tire Components The bead filler is a hard rubber compound used to provide stability to the lower sidewall and bead area. Bead Filler chapter PARTS OF A TIRE CORE TIRE KNOWLEDGE
Tire Components The cord body provides 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. Cord Body [ tire casing ] chapter PARTS OF A TIRE CORE TIRE KNOWLEDGE
Tire Components The sidewall is 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. Sidewall chapter PARTS OF A TIRE CORE TIRE KNOWLEDGE
Tire Components Belt plies are 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. [ package or system ] Belt Plies chapter PARTS OF A TIRE CORE TIRE KNOWLEDGE
Tire Components The cap ply also 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. Cap Ply chapter PARTS OF A TIRE CORE TIRE KNOWLEDGE
Tire Components The tread is 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. Tread chapter PARTS OF A TIRE CORE TIRE KNOWLEDGE
Tire Dimensions These are the basic tire dimension terms. Tread Width Section Width Section Height Overall Diameter Static Loaded Radius Aspect Ratio [profile or series] chapter TIRE AND RIM DIMENSIONS CORE TIRE KNOWLEDGE
Tire Dimensions The tread width is 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. chapter TIRE AND RIM DIMENSIONS Tread Width TREAD WIDTH CORE TIRE KNOWLEDGE
Tire Dimensions chapter The section width is 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. TIRE AND RIM DIMENSIONS Section Width TREAD WIDTH SECTION WIDTH CORE TIRE KNOWLEDGE
Tire Dimensions chapter The section height of a new tire is the distance from the rim vertically to the highest point of the unloaded tread area. TIRE AND RIM DIMENSIONS Section Height TREAD WIDTH SECTION WIDTH SECTION HEIGHT CORE TIRE KNOWLEDGE
Tire Dimensions chapter The aspect ratio, also known as the profile 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. TIRE AND RIM DIMENSIONS Aspect Ratio [profile or series] 75 SERIES 70 SERIES Height = 75% of Width 60 SERIES CORE TIRE KNOWLEDGE
Tire Dimensions The overall diameter of 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. chapter TIRE AND RIM DIMENSIONS Overall Diameter OVERALL DIAMETER SECTION HEIGHT RIM DIAMETER CORE TIRE KNOWLEDGE
Tire Dimensions The static loaded radius is 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. chapter TIRE AND RIM DIMENSIONS Static Loaded Radius OVERALL DIAMETER RIM DIAMETER SECTION HEIGHT STATIC LOADED RADIUS CORE TIRE KNOWLEDGE
Additional Tire Sidewall Information The maximum load indicates the load capacity for a tire. The inflation pressure indicates the maximum air pressure. chapter TIRE SIDEWALL INFORMATION Maximum Load and Inflation Pressure CORE TIRE KNOWLEDGE
Additional Tire Sidewall Information 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. chapter TIRE SIDEWALL INFORMATION The Department of Transportation [DOT] Code 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!
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
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
Article Number Tire Size Rim Size Tire Description OE Code Load Rating Speed Rating O/A Dia Tread Width Tread Depth (32's) Approved Rim Max Load Ma x PSI O.E /70B17M/C17BT020F BW TL (BIAS)M 58V V (3.50) BMW K1200LT /70B17M/C17BT020F BW TL (BIAS)M 58V V (3.50) BMW K1200LT (Bias Ply) /70ZR17M/C17BT020F BW TLE58WZ BMW R1150RT /70ZR17M/C17BT020F BW TLNN58WZ (3.50) Triumph Sprint ST /70ZR17M/C17BT020F BW TLUU58WZ (3.50) BMW K1200GT /70ZR17M/C17BT020F BW TLL58WZ (3.50) Kawasaki ZRX /70ZR17M/C17BT020F BW TL-58WZ (3.50) Ducati ST /70ZR17M/C17BT020F BW TLB58WZ (3.50) Honda VFR800F /70ZR17M/C17BT020F BW TLG58WZ (3.50) Yamaha FZ /70ZR17M/C17BT020F BW TLG58WZ (3.50) Kawasaki Ninja 650R /70ZR17M/C17BT020F BW TLCC58WZ (3.50) Yamaha FJR /70ZR17M/C17BT020F BW TLCC58WZ (3.50) BMW K1200GT /70ZR17M/C17BT020F BW TLCC58WZ (3.50) BMW R1200RT /70ZR17M/C17BT020F BW TLCC58WZ (3.50) Yamaha FZ /70ZR18M/C18BT020F BW TLF59WZ (3.50) Honda ST /60ZR17M/C17BT020R BW TL-69WZ (4.50) Kawasaki Ninja 650R /70B17M/C17BT020R BW TL (BIAS)M 79V V (5.00) BMW K1200LT /70B17M/C17BT020R BW TL (BIAS)M 79V V (5.00) BMW K1200LT (Bias Ply) 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
GL1800LT Article Number Tire Size Rim Size Tire Description OE Code Load Ratin g Speed Rating O/A Dia Tread Width Tread Depth (32's) Approved Rim Max Load Max PSI O.E /70R18M/C18G709F BW TL- 63H H Article Number Tire Size Rim Size Tire Description OE Code Load Rating Speed Rating O/A Dia Tread Width Tread Depth (32's) Approved Rim Max Load Max PSI O.E /60R16M/C16G704R BW TL- 74H H Honda GL /60R16M/C16G704R BW TL- 74H H Honda GL H is equal to max load is 600lbs at 41psi at 130MPH 74H is equal to max load is 827lbs at 41psi at 130MPH
Motorcycle Data collection BIKE INFO Weights (FRT / REAR) YEARMAKEMODELMileageFuel LevelBike OnlyW/1 RiderW/2 Riders 12004HONDAGL180041,889FULL440/556488/646501/ HONDAGL180018,254FULL422/526471/636482/ HONDAGL180012,901FULL433/548466/642462/ HONDAGL180050,974FULL394/543440/629438/ HONDAGL180040,580FULL431/579482/656482/ HONDAGL180060,288FULL447/614449/638453/ BMWK1200LT58,8952/3392/484453/605451/ BMWK1200LT0FULL403/462451/594449/ BMWK1200LT25,2941/3389/462436/592440/ BMWK1200LT32,781FULL414/510449/638449/ / / / / / /821 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 451/ / / /798
You’re still at 290lbs towing Stopping weight! You’re still at 430lbs towing Stopping weight!
If you just have to tow…..use a trike. The tires have the load carrying capacity!
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)
Tires Mounted Backwards 1) Tires have a directional arrow on them for a reason Nitrogen vs. Compressed air ProsCons N2 is always DrierUsually costs money N2 helps tire run coolerNot always available N2 is good for higher speedsWhat percentage N2 C.A. is readily availableSometimes very wet C.A. is as good as N2 whenVery hard to get in dry drycondition.
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.