Profex Puncture Resistant Road Tyre

Product Information

It ‘ll come as no surprise that there are bicycle tires in many different forms. There are big differences in pattern, size and above target. You can buy everything from studded tires and tires for BMX bikes to regular tires with a different pattern for adult and children’s bikes. 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. With this in mind, let's think about what is happening when we apply energy to a common tool, like a lever. Levers help us move masses easier than if we tried to move the mass without it. Some objects that just won't budge when we try to lift them ourselves, seem easy to move when we apply the use of this simple tool. In effect, they give us seemingly superhuman strength when we need it. But how does this lever really do this if I'm not gaining energy from someone?

The most important concepts of these definitions have to do with the fact that we are not creating energy -- only transferring it in the form of Work. But since Work is the transfer of energy, and we cannot create any new energy, then how are we able to move a big object without increasing energy?The StinGR 150 can develop the same power at the shaft as any 150cc 2-stroke gas engine, spinning a 30x12 C2E propeller to the threshold of tip speed efficiency at only 214A with a simple 12S battery configuration and the non-geared motor power equivalent of 11.2 kW. This is more than 13 HP at the shaft. I felt it necessary to design and develop a unit from the ground up since a few of the existing belt and gear drive systems I tested were problematic and certainly not robust enough to manage the torque and precession of 28 to 30 inch propellers.

So we reduced the weight of the power system by 18.28% and increased the power-out by 27.21% when both systems are drawing the same current. Since late 2018, I've been involved with the R&D of an electric power gear reduction unit that can deliver comparable power of a 120cc gas engine, and potentially greater. 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 StinGR 85 can develop the power equivalent of an 85cc 2-stroke engine, spinning a 25.5x13 or 26x12 C2E propeller to only 125A with a 12S battery configuration and the non-geared motor power equivalent of 6.5 kW -- about 7.5 HP at the shaft. Another reason not to exceed the 2.2 limit on road is that a more bulbous tyre can deflect side ways with a noticeable effect on control and road holding. Conversely, fitting a tyre of less than 1.4 times the rim section will result in a harsh ride and more rolling drag than a larger tyre at the same pressure. Tubeless tyres