Unicycles have also been used to create new sports such as unicycle hockey. Unicycle football is similar to American football except that it is played on unicycles. These unicycles are used similarly to flatland bicycles. The Torker line currently includes bicycles, unicycles, strollers, and trailers. Examples include most Penny-farthings, unicycles, and children's tricycles. Miyata is a Japanese manufacturer of bicycles, unicycles and fire extinguishers. "Cycling" generally includes the riding of unicycles, tricycles, quadracycles, and "similar" human-powered transport (HPVs). Many shops also carry related items such as unicycles and skateboards. Torker's product line expanded to include beach cruisers, tandem bikes and even unicycles. In the 2010s, electric skateboards became popular, along with self-balancing unicycles in a board format. They rode large unicycles equipped with two-speed Schlumpf geared hubs. These unicycles and disciplines commonly use cranks lengths greater than 125mm. Unicycles usually, but not always, lack brakes, gears, and the ability to freewheel. Mountain unicycles have thicker, wider tires for better traction. They ride into a railroad tunnel and encounter a train, but emerge riding unicycles.