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A separate airtight inner tube enclosed by the tire supports the tire carcass and maintains the bead lock. An advantage of this system is that the inner tube can be easily accessed for a patch repair or replacement of the tube. The ISO 5775-2 standard defines designations for bicycle rims. It distinguishes between Straight-side (SS) rims
Fitting rim tape around 26 inch wheel (MTB). Rim tape protects the bicycle wheel's inner tube from spoke holes, which will puncture the tube if exposed inside the rim. Most bicycle rims are "clincher" rims for use with clincher tires. These tires have a wire or aramid (Kevlar or Twaron) fiber bead that interlocks with flanges in the rim. A ...
Wheel flop refers to steering behavior in which a bicycle or motorcycle tends to turn more than expected due to the front wheel "flopping" over when the handlebars are rotated. Wheel flop is caused by the lowering of the front end of a bicycle or motorcycle as the handlebars are rotated away from the "straight ahead" position.
The nominal width of a rim is the inner width between the straight sides or beads as one can easily measure it with a caliper (see the standard for drawings and exact measurement procedures). The standard widths of straight-side rims are: 18, 20, 22, 24, 27, 30.5. The standard widths of crochet-type rims are: 13C, 15C, 16C, 17C, 19C, 21C, 23C, 25C
For bicycles with 700c wheels, some cyclists quote gear inches based on a nominal wheel diameter of 27 inches, corresponding to the old British tire size of 27 x 1 + 1 ⁄ 4" (ETRTO 630). Strictly speaking, the rolling diameter of a 700c wheel may be significantly higher or lower than 27", depending on the tire size, e.g. nearly 27.5" for a ...
British Morris and MG engines from 1923 to 1955 were built using metric threads with bolt heads and nuts dimensioned for Whitworth spanners and sockets. [13] In 1919, Morris Motors took over the French Hotchkiss engine works which had moved to Coventry during the First World War. The Hotchkiss machine tools were of metric thread but metric ...
An indication in centimetres or inches can mean the length of the foot or the length of the shoe's inner cavity. Differing amounts of wiggle room required for different sizes of shoes. For wide feet, a shoe several sizes larger (and actually too long) may be required and may also result in inconsistent size indications when different typical ...
Any conductive material, if wrapped around the appliance without large holes, forms a Faraday cage that blocks low-frequency electromagnetic radiation. The maximum allowable hole size depends on the highest frequency that needs to be blocked. —Ilmari Karonen 16:55, 1 December 2005 (UTC)