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2. List of bicycle parts - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_parts

   Hub gear: a gearbox mounted inside the hub, 3-speed is common, 5, 7 are available ("Sturmey-Archer"), Enviolo makes a CVT, and Rohloff makes a 14-speed hub. Cable operated by one or two cables; Indicator: a turn signal; Inner tube: a bladder that contains air to inflate a tire. Has a Schrader, "Woods"/"Dunlop" or Presta valve for inflation and ...

3. Corsi–Rosenthal Box - Wikipedia

   en.wikipedia.org/wiki/Corsi–Rosenthal_Box

   The clean air delivery rate (CADR) of a four-filter, US$75 design were estimated at between 165–239 cubic feet (4.7–6.8 m 3) per minute (depending on fan speed) in an August 2021 case study by UC Davis researchers. [24] In April 2022, a team based at UC Davis published a study of a Corsi–Rosenthal Box that used five two-inch MERV-13 filters.

4. List of bicycle brands and manufacturing companies - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_brands_and...

   This page lists notable bicycle brands and manufacturing companies past and present. For bicycle parts, see List of bicycle part manufacturing companies.. Many bicycle brands do not manufacture their own product, but rather import and re-brand bikes manufactured by others (e.g., Nishiki), sometimes designing the bike, specifying the equipment, and providing quality control.

5. Lotus (bicycles) - Wikipedia

   en.wikipedia.org/wiki/Lotus_(bicycles)

   Both Windsor and Lotus cycles received the top ratings in the Consumer Reports, November 1985 issue. Lotus International depended heavily on outside financing to fund its growth and when its bank unexpectedly changed hands and interrupted financing, the company was nearly forced into bankruptcy.

6. Shaft-driven bicycle - Wikipedia

   en.wikipedia.org/wiki/Shaft-driven_bicycle

   A shaft-driven bicycle is a bicycle that uses a drive shaft instead of a chain to transmit power from the pedals to the wheel. Shaft drives were introduced in the 1880s, but were mostly supplanted by chain-driven bicycles due to the gear ranges possible with sprockets and derailleurs .

7. Bicycle gearing - Wikipedia

   en.wikipedia.org/wiki/Bicycle_gearing

   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 ...