Motorcycle tire contact patch

Once done you have a picture of the tire contact patch, and can easily measure the size of the. You can search online to compare tire sizes to match the specs on sizes so you can get the best match and fit for your bike. The shape of a tire s contact patch or footprint greatly influences its performance and is dependent on its profile or aspect ratio. Bridgestone proprietary technology visualizes and measures contact patch.

Jan 25, 2014 the tire contact patch all vehicles are supported by a cushion of air contained in four flexible rubber tires. But how to repair punctures in tubeless tiresand even if they should be repairedis a tricky subject. What is the relationship between cornering ability and width. Darkside contact patch vs motorcycle tire contact patch. This booklet, however, cannot cover every possible example or aspect of tire usage. This force could be the weight of a motorcycle pressing the tire into the pavement, or the clamping force pressing two pieces of wood together. A car tire is pretty flat, whereas a bike tire is more ushaped. Jan 14, 2017 tire profiles are designed with specific rim widths in mind, and in some cases putting a wider tire on narrower rim can pinch the tire so much that the contact patch becomes smaller. I would not try to place any large emphasis on this contact patch theory. If the wheel turns much like a motorcycle wheel, then it seems like the tire would be riding on its edge. A bigger contact patch does not give a tire more resistance to sliding. A broader contact patch makes for more grip in the development of the battlax hypersport s22 tire, bridgestone employed its proprietary ultimat eyetm technology,1 to measure and visualize the behavior of tire contact patches.

Vl10100 aavalueline round universal radial tire patch. Contact patch area optimization agility and higher cornering precision. If its time to get new motorcycle tires, youre most certainly in the right place. Riding on underinflated motorcycle tires is dangerous for several reasons. Motorcycle tire contact patch for comparison to darkside. But on a twowheeler, with only two small patches of rubber. Jun 29, 20 when you install wider tires without changing anything else, the size of the tire s contact patch i. The two tyres contact patches are the motorcycle s connection to. As the motorcycle propels forward and the tire rotates, and if the road was wet, the grooves on the rear tires are designed to push water to the side. With a wider tire, the contact patch is farther away from the centerline of the bike, so the bike has to lean over farther to achieve that necessary equilibrium. With motorcycles, there are only two small contact patches for the rider to rely on, so it is extremely important to keep the tires in top condition.

I advise against patching any tire without first contacting. Tires with a higher profile or aspect ratio that is, the height of the sidewall is fairly large compared to the width of the tire, tend to have a long and narrow contact patch. The contact patch is that portion of the tread in contact with the road surface at any given time. This is an important requirement for tire safety and mileage. A narrow rim will alter the tire profile, concentrating tire wear in a very small area during cornering, with a smaller contact patch during braking. Jun 30, 2018 good conditions to test the new tire, really, as the fog began to lift but the cool and damp remained. The force of friction is proportional to the normal force f mu x n, where f is along the surface and n is perpendicular to. Loss of pressure may occur due to wornout or badly seated valve. Dunlop sportmax q4 rear motorcycle tire 19055zr17 75w streettrack 45233074. Apr 18, 20 safety also depends on the position of the patch, if the tire has steel belts, who does the work, and the way the tire is constructed. This part covers the dynamics of a tire s contact patch. Daves mission is to ensure that every motorcyclist anywhere in the world gets the fundamental information needed to understand the basics of their own motorcycles suspension. The camp that has plugged their tire and patched their tubes and have had no issues, and the other camp that says its the most dangerous thing you.

The big problem here is a car tire doesnt really fit as ideally as a motorcycle tire. Faq performance motorcycle tires dunlop motorcycle tires. Making sure your motorcycle tires are ready for a long. Since the wear characteristics of tires is a highly competitive area between tire.

So for the same tire drop of 6% the 29 wheel has a 2. Do you ever get balls or lips on the leading or trailing edge of the tread pattern on your motorcycle tires. It allows you to maximize your tires contact patch with the road allowing you to attain optimal traction while avoiding the negative effects that other tires might give you such as poor handling, steering, etc. That means your safety rides on your tires having more miles of tread life than the distance you plan to travel. This is part 6 of my 10 part series on how race car tirestyres work. A tire that is installed on a rim wider than recommended will have a flattened profile, and a rider may easily reach the edge of the tread during cornering. If you enlarge the contact patch by making the tire wider, you get more grip and that larger contact patch dissipates more heat and provides. For high performance driving, the tires contact patch would.

If the size of the contact patch alone caused greater friction, then putting a wider tire on a motorcycle would automatically give more grip. In wet weather with a car tire on your bike you will have less water dissipation and the bike could be fundamentally dangerous. The two tyres contact patches are the motorcycle s connection to the ground, and so are fundamental to the motorcycle s suspension behaviour, and critically. This makes perfect sense as you want minimal water to get trapped between the road and the tire surfaces to maximize grip. Jul 16, 2012 overinflating tires does not increase loadcarrying capacity, but will result in a hard ride and accelerated tire wear in the center of the contact patch. We perform motorcycle diagnostics, service and repair, regular motorcycle maintenance, tire c hanges, brake service and oil changes as well as motorcycle performace upgrades, visual enhancements such as fabrication.

Let your tires cool off remember, tires heat up when you ride and that heat can affect your. Dunlop sportmax gpr300 rear tire 1805517 oem kawasaki. The adhesive then vulcanizes when the tire heats up. Those have lasted the life of the tire without worry.

Loss of pressure may occur due to wornout or badly seated valve cores. The contact patch will vary in shape and size depending on the geometry of the tire, and this affects various performance characteristics of the tire. From 390 lb to 773lb almost double the tire load the contact patch size only increases by 25%, even assuming laterally constrained sidewalls. Explore how bridgestone motorcycle tires use cutting edge technology to help you keep your grip on any road. Similarly, when a tire is underinflated, the contact patch is too large, so the tire actually overheats and creates a melting environment. Today, you better have a motorcycle tire repair kit or at least a few tips at your disposal. This isnt as deep as a cold tear, but it is a tear nonetheless. Hromee 56 pieces tire repair tools kit for car, trucks, motorcycle, atv, rv universal emergency flat tire puncture repair patch set with portable bag 4. If it turns more like an automobile, then there would be a larger contact patch. Consult the appropriate motorcycle or tire manufacturer for issues not addressed in this booklet. The new tire will also not react the same in combination with its remaining tire. Your motorcycle owners manual will tell you the recommended cold inflation pressure. Motorcycle tyres tires in american english are the outer part of motorcycle wheels, attached to the rims, providing traction, resisting wear, absorbing surface irregularities, and allowing the motorcycle to turn via countersteering.

Speedo reading tire 1 is assumed accurate tire susp. Any tire, no matter how well constructed, may fail in use as a result of punctures, impact damage, improper inflation, overloading, or. The rubber on the sidewall is much thinner, as anyone whos ever hit a curb knows. Plugging and repairing a tubeless motorcycle tire motorcyclist. In this post, im continuing with the wheel size theme, but looking at tire related factors such as contact patch, tire pressure and tread. Do this for the front tire as well, as the front and rear tires can and will likely have different specs on width and diameter. Place a sheet of paper under the tire and slowly lower the tire until all of the bikes weight of off of the jack. With the tubeless tires on bigger adv bikes, a plug is the goto solution, and there are. Check cold tire pressure frequently with a goodquality gauge that holds a reading, and always before extended trips. With that information all can begin to understand why setting up a motorcycle chassis and suspension is critical to rider safety for every motorcycle produced. Dec 27, 20 a bigger contact patch does not give a tire more resistance to sliding. Understanding motorcycle tyre grip motodna motorcycles. Measuring tread contact on cornering the car tire had more contact than the bike tire. It is commonly used in the discussion of pneumatic i.

In wet weather with a car tire on your bike you will have less water dissipation and the bike. Friction and contact patch size steve munden tutors mathematics. Adequate tire tread not only ensures tire integrity, it allows water to be channeled away from the contact patch, which helps maintain grip under wet conditions. It also helps that my last few bikes have had tire pressure monitors, so i can tell if the tire s holding or not after the repair. Find the best motorcycle tires for your specific bike, surface, and style.

Bridgestone develops tires that result in the maximum performance of vehicles by using ultimat eye, its unique technology to visualize the contact patch. Lift the bike again and you will see the contact patch of the tire. The size and shape of the contact patch, as well as the pressure distribution within the contact patch, are important to the ride qualities and handling characteristics of a vehicle. F0p rema red edge patches for bicycle, motorcycle, carlt. Overinflating tires does not increase loadcarrying capacity, but will result in a hard ride and accelerated tire wear in the center of the contact patch. Use a tire pressure gauge to see how low the motorcycle tire may be. The diablo family has rapidly evolved from its 2002 introduction in the supersport segment to cover many other market segments from racing to hypersport. The tires will build excessive heat and can cause sudden tire failure.

The diablo trademark represents the excellence of the pirelli brand in the motorcycle tire industry. Does the contact patch size on a motorcycle tire matter. It allows you to maximize your tire s contact patch with the road allowing you to attain optimal traction while avoiding the negative effects that other tires might give you such as poor handling, steering, etc. If you could place a car on a glass floor and look at it from below, you would see four patches of rubber, most folks are surprised at the size of these four patches, depending on the vehicle each patch is a little smaller than a hand. Using a quarter, ensure that when placed within the tread groove, theres enough tire tread to extend past the top of washingtons head. Contact patch is the portion of a vehicles tire that is in actual contact with the road surface. You are going to find a couple of camps on this one. These black round sticky things are able to keep our motorcycles in control at extreme speed and lean angles, relying on only two small patches of rubber in contact with the asphalt. Dec 07, 2012 very well illustrated and formulated explanation by appu. Why do motorcycle front and rear tires have opposite tread. The contact patch on a motorcycle tire is much larger than a car s. But how to repair punctures in tubeless tires and even if they should be repairedis a tricky subject. The force of static friction between a nonsliding tire and pavement, the grip, may be expressed as f s s x weight of the motorcycle and rider where s is the coefficient of static friction about 0.

Dunlop sportmax q4 rear motorcycle tire 19050zr17 75w streettrack 45233060. Reading motorcycle street tires this is the 3rd installment of daves street tire reading from 2018. Motorcycle tires guide and explanation of tire codes on. A motorcycle tyre is an extraordinary piece of engineering.

Whats the point of having a larger tyre contact patch. We condensed all the treaded tire reads into 3 videos so you can focus on that skill set. Noting the relevant drawings, we see that at zero lean angle, the car tire has a much larger contact patch than the bike tire. The contact patch of most tires is about the size of your hand and has to handle a lot more weight and force than those big reeboks do. Order a motorcycle tire repair kit from, trusted since 1999. Since the original diablo rosso corsa appeared in 2010, says pirelli, torque and horsepower outputs have increased significantly and the introduction of sophisticated traction control systems and cornering abs have enabled these performance gains to be applied by more riders able to reach. May 12, 2015 similarly, when a tire is underinflated, the contact patch is too large, so the tire actually overheats and creates a melting environment. This is part 6 of my 10 part series on how race car tires tyres work. When you install wider tires without changing anything else, the size of the tire s contact patch i. The sidewalls of a car tire are designed to keep the contact patch on the ground, but not designed to be part of the contact patch themselves. Motorcycle tire pressure recommendations and checks.

Increased grip and stability at maximum lean angle greater feeling with improved bike control when cornering. This part covers the dynamics of a tires contact patch. But it seems to work for dragsters and offroad riders, where a big, flat contact patch gives the best grip. Always keep the motorcycle manufacturers recommended air pressure in both tires. The shape of a tires contact patch or footprint greatly influences its performance and is dependent on its profile or aspect ratio. We have everything you need to fix your flat tire and get back on the road, fast. Bridgestone proprietary technology visualizes and measures contact patch behavior to maximize performance with. Jlb rear tire construction that utilizes a continuously wound belt for smooth performance and a consistent tire contact patch. A motorcycle tire, on the other hand, has virtually no sidewall much more of the tire is designed to touch the road. The new tire has a rounder tread profile, different contact patch and leanover edge than the worn profile of an old tire. New tread pattern design and geometry optimization.

Under inflation causes irregular tread wear at the edge of the contact patch and may also damage the tire beyond use. Same rubber, so same coefficient of friction, so same resistance to sliding until you apply the cc power. Why tire tread depth matters and how to measure it. This seems reasonable, given that the width of a motorcycle tire places it firmly within oneinch from the tread edge on most. In addition, the shape of the contact patch will influence the performance of the tire and the vehicle its mounted on. Contact patch vs grip school questionsgeneral discussion. Because patch repairs are generally the province of trained technicians who have the equipment to dismount and remount the tire, they take longer and cost. Things to consider before you put car tires on your motorcycle. Bridgestone motorcycle tire safety and maintenance manual. Check tire specifications take a look at the tire sidewall to see how much air should be in the tire. Further, note that the drawings of the motorcycle tire contact patch show a. This might not be a bad thing, provided we always rode with no need to turn or swerve sharply. The contact patch surface pressure is not however, the same as the inflation pressure, as is.

During this difficult time, we are working hard to maintain our service. The contact patch is the only connection between the road and the vehicle. Each of these four small patches of rubber is known as the contact patch. Does a larger motorcycle tire footprint increase grip.

Additionally, the calculated contact patch pressure rises from 6. The tire is the only component of a vehicle in direct contact with the road surface and transmit the enginemotor power of driving, turning and stopping to the road. This technology has also been used for developing tires for the fim endurance world championship. Consider a skinny little bicycle tire of the same rubber as your 180section or 190section sportbike rear tire. Dec 26, 2016 let us first take a look at the tread pattern on the rear tire. So you admit there are effects on traction due to contact patch area. Tire contact patch lowering pressure gain traction. Ive plugged nearlynew tires to get home, or to someplace safe, then taken those tires in to an auto tire repair shop to have a proper internal tplug installed. Remember, your motorcycle depends on only two small contact patches for traction. A patch is an adhesivebacked piece of rubber that is placed on the inside of the tire. The force of friction is proportional to the normal force fmu x n, where f is along the surface and n is perpendicular to. Tires have widely different constructions, and thus some make better use of a larger contact patch while others may not, and some may not have a larger contact patch but still get the job done.

I went with a 2155516 which was close to the same size as the stock tire, but wider. My front tire often wears more on the left side than the right. Grip it and rip it in the canyons with the bridgestone. The biggest difference youll observe between a car tire and a bike tire are their profiles. The friction between two surfaces is proportional to the force pressing one to the other. Bridgestone motorcycle tires your journey, our passion. Feb 21, 2020 the contact patch on a motorcycle tire is much larger than a cars.