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Schlumpf Speed Drive. A Schlumpf Drive is a two-speed planetary gear assembly for use on bicycles and unicycles. It is distinct from other bicycle planetary gear assemblies in that it is located behind the chainring rather than in the rear hub. A push-button on each side of the axle allows the rider to switch between high and low ratios.
One standard option for the Brompton folding bicycle is to use a 3-speed hub gear (roughly a 30% difference between gear ratios) in combination with a 2-speed derailleur gear (roughly a 15% difference) to give 6 distinct gear ratios; this is an example of half-step gearing. Some Brompton suppliers offer a 2-speed chainring 'Mountain Drive' as ...
The company was officially founded in 1993. [2] It was founded by Markus Riese and Heiko Müller, who had met studying mechanical engineering in Darmstadt in 1988. After a 1991 cycle trip to Tunisia, they decided they had a shared interest in developing bicycles. [3]
Brompton is a village and civil parish in the unitary area and county of North Yorkshire, England, about 1.6 miles (2.6 km) north of Northallerton. The village was near the site of a battle between English and Scots armies and was the location of mills producing linen goods from the 18th century onward.
Before epicyclic gears were used in bicycle hubs, they were used on tricycles. Patents for epicyclic hubs date from the mid-1880s. [5] [6] The first patent for a compact epicyclic hub gear was granted in 1895 to the American machinist Seward Thomas Johnson of Noblesville, Indiana, U.S.A. [7] This was a 2-speed but was not commercially successful.
Nicolai gearbox mountain bike Pinion P1.18 gearbox installed in a bicycle frame Instinctiv Modern full suspension carbon gearbox mountain bike. A gearbox bicycle is a bicycle that uses a gearbox [1] [2] to convert torque and rotational speed from the power source, usually the rider's legs, to what is desired at the drive wheel.
U.S. Bicycle Route 66 (USBR 66) is a United States Bicycle Route that follows the former U.S. Route 66 (US 66) across the United States. The first section of the route, spanning 358 miles (576 km) between Baxter Springs, Kansas, and St. Louis, Missouri, was designated as USBR 66 in 2018.
Dr Jeff Allan and his son Ben Cottam-Allan having completed their journey from Land's End to John o' Groats set off for the return journey. On 7 October 2015, Jeff Allan and his son, Ben Cottam-Allan, beat the electric car record in a Tesla Model S completing the northbound route in 19 hours 45 minutes and the southbound route in 18 hours 53 ...