Profex Puncture Resistant Road Tyre

Product Information

A tyre size conversion calculator or tyre diameter calculator are the best ways to get the answers you are looking for. What sets us apart is our tyre suggestion guide. For each tyre size you input our tyre calculator suggests multiple tyre sizes that are with in one inch bigger and smaller of the entered tyre size. Making it as simple as possible to find the tyre that is just right for you. As it turns out, Work is also defined as the product of Force times distance. If we think about this, what we are really saying is that: Tyres suitable for use with dedicated tubeless rims, or with a conversion system which employs tape to seal the rim bed, are marked using a sidewall decal such as tubeless-compatible, tubeless-ready, tubeless-easy or similar. They have a special stretch-resistant folding bead made, usually, of carbon fibre.

By understanding the concept of mechanical advantage using a simple lever, we can now see how Force extended over distance can increase. Same Current: At the same current as the Q100 spun the 28x12 to WOT, the StinGR with the 28x13 C2E develops a 14.89% higher pitch speed while developing 27.21% more power at the shaft.The gear reduction of this unit increases the efficiency between Watts-in and Watt-out. This means that there is a smaller margin between the power needed to run the entire unit and the propulsive force the unit develops at the shaft. The StinGR is a gear reduction, belt-driven, transmission unit that reduces the high RPM and HP of an RC helicopter motor to the lower RPM torque required to deliver peak propeller performance for giant scale airplanes. But if we only have a certain amount of strength and energy, and we cannot create new energy to help us, then how do these tools enhance our strength to move the object we never could without them? The initial two-digit number is the tyre section and roughly indicates the tyre width. Its actual width is normally less, but varies according to how the tyre is designed and the width of rim to which it is fitted. But the height of the tyre usually corresponds quite closely to tyre section, so overall diameter approximately equals the bead diameter plus twice the section. So with the first law of thermodynamics intact because Energy and Work are the same on both the Input and Output side, we can see how the Force must be increased on the Output side for this to happen. In practical terms, the magnitude of Force is enhanced with distance.

This defines the Work that is being applied on the left side of the diagram, and let's call this Input. Weight Comparison 1: The StinGR unit all-up with prop mounting hardware and connectors is 15.8% lighter than the Q100 all-up. On the right side, and let's call that the Output, the edge of the lever is rising a specific distance that is half that of the Input side, over the same amount of time.

One way to define it, popular in times past, was to measure the tyre’s outside diameter and its maximum width when inflated, but this can be misleading. For example, some tyres marked 28" are actually much less than 27 inches in diameter, while 26×1.5 and 26×1½ are two completely different sizes. Same RPM and Different Propeller: At the same RPM as the Q100 spun the 28x12, the StinGR with the 28x13 C2E draws 18.80% less current, develops an 8.4% higher pitch speed and 6.56% more power at the shaft. On the Input side, Work is the Force I am applying times the downward distance the edge of the lever arm is moved. The torque of these units also enables true scale propellers to be used on planes, including multiple blade propellers for scale and warbird planes. A StinGR with a 24 inch 3-blade propeller can be easily managed for 86 to 90 inch planes and 27 inch 3-blades can be easily managed for 94 to 100 inch planes. Two tyres with the same ISO markings are completely interchangeable, even if one seems to be metric and the other is also marked in inches. For example, 650B and 26×1½ are both 38-584 and should be marked accordingly. Look for the ISO numbers and you always know exactly where you are.

For this specific topic about the advantage of gear reduction, there are some concepts that need to be defined first. Additionally, power the ESC with a LiPO to connect it to the Sproto UI on your PC is no longer needed as well. Weight Comparison 2: The StinGR unit all-up with the 28x13 Falcon is 18.3% lighter than the Q100 all-up with the 28x12 PJN. The answer lies in the definition of the terms above, and if we look closely at the image below, we will see the specific things that changes Force without changing Energy or Work.

Search the website

That’s how the diameter and circumference (circ – equals distance rolled in one turn of the wheel) are calculated in the Tyre size table. These figures are useful for setting your cycle-computer and precisely calculating gears.

Tubeless tyres, as the name suggests, do away with an inner tube and, in its absence, are reliant on the shape and tightness of the tyre bead to ensure the tyre doesn’t blow off the rim at high inflation pressures; in a conventional clincher tyre, the inner tube keeps the bead securely located under the rim hook. Here is a performance table with general expectations of the different StinGR combinations we now provide, and here is what each column represents: If you are facing and should change the tires on your bike, it is important that you choose the right bicycle tire sizes for your bike wheels. Each tire size is very variable depending on the type of bicycle tire you want, and depending on what type of bike you have. In this article you will get a small guide on how to choose the right bicycle tire size for your bike. Table of bicycle tires sizes There is also a 14S motor Kv option for each of these power levels, but because of the StinGR's efficiency, a simple 12S two-battery configuration can be used all the way up to 50 pound airplanes just like we do starting with 10 pound 70 to 74 inch planes. The answer to this question defines how the mechanical advantage these tools apply works. But we must define the words that we are using and define how they are different.

In physics, it is important to have our terminology defined because outside of physics, words are easily and often confused. As with any professional discipline, how we define the language we use is important. I cannot emphasize enough how the independent definition of Force, Work, Energy, and Power, should be understood and not confused. For Work and Energy to be equal on both sides, the upward Force applied on the Output side must be twice the amount on the Input side because of the difference in the distance. To develop the same 6141 Watts-out with the StinGR and the 28x13 C2E that we saw with the Q100 motor spinning the 28x12 PJN, we had to lower the Kv of the motor to 485K and the voltage to 43.29v. Feel free to ask questions about the StinGR unit as you review some of the information and videos below.