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2. Ring size - Wikipedia

   en.wikipedia.org/wiki/Ring_size

   An analogic sizing ring stick. Ring sizes can be measured physically by a paper, plastic, or metal ring sizer (as a gauge) or by measuring the inner diameter of a ring that already fits. Ring sticks are tools used to measure the inner size of a ring, and are typically made from plastic, delrin, wood, aluminium, or of multiple materials. Digital ...

3. Roller chain - Wikipedia

   en.wikipedia.org/wiki/Roller_chain

   Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.

4. Sprocket - Wikipedia

   en.wikipedia.org/wiki/Sprocket

   16 tooth sprocket. Do = Sprocket diameter. Dp = Pitch diameter A sprocket and roller chain. A sprocket, [1] sprocket-wheel [2] or chainwheel is a profiled wheel with teeth that mesh with a chain, rack or other perforated or indented material. [3] [4] The name 'sprocket' applies generally to any wheel upon which radial projections engage a chain ...

5. Signet Jewelers - Wikipedia

   en.wikipedia.org/wiki/Signet_Jewelers

   Signet Jewelers Ltd. (Ratner Group 1949–1993 then Signet Group plc to September 2008) is, as of 2015, the world's largest retailer of diamond jewellery. [1] The company is domiciled in Bermuda and headquartered in Akron, Ohio , and is listed on the New York Stock Exchange .

6. Derailleur - Wikipedia

   en.wikipedia.org/wiki/Derailleur

   Cage length, when combined with the pulley size, determines the capacity of a derailleur to take up chain slack. Cage length determines the total capacity of the derailleur, that is the size difference between the largest and smallest chainrings, and the size difference between the largest and smallest sprockets on the cogset added together. A ...

7. List of bicycle parts - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_parts

   Cassette: a group of stacked sprockets on the rear wheel of a bicycle with a rear derailleur; Coaster brake or backpedal brake; Chain: a system of interlinking pins, plates and rollers that transmits power from the front sprocket(s) to the rear sprocket(s)

8. O-ring chain - Wikipedia

   en.wikipedia.org/wiki/O-ring_chain

   O-ring chains are most notably used in motorcycles, one of the most demanding applications for a metal chain. High rpm and heavy loads require bulky chains, but such engineering increases the effect of friction compared to lighter chains. So lubrication plays a vital role here, but the high rpm also makes it very difficult to keep lubrication ...

9. BSA Spitfire - Wikipedia

   en.wikipedia.org/wiki/BSA_Spitfire

   The BSA Spitfire is a high-performance BSA motorcycle made from 1966 to 1968 with model designations of MkII, MkIII and MkIV. Announced at the Brighton motorcycle show held during September 1965, [2] it was based on the earlier BSA Lightning with a power-upgrade achieved by higher compression-ratio 10.5:1 pistons and two large-bore Amal GP carburettors with velocity stacks [1] it was one of ...