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  2. Bicycle handlebar - Wikipedia

    en.wikipedia.org/wiki/Bicycle_handlebar

    Bar ends were very popular on mountain bikes from the early 1990s until the late 1990s, when upswept "riser bars" came back into fashion; the combination of riser bars and bar ends is rarely seen. Pair of full curve bar ends. Bar ends can prove troublesome when negotiating twisty tracks between trees as they may hook around branches and cause a ...

  3. Raleigh Chopper - Wikipedia

    en.wikipedia.org/wiki/Raleigh_Chopper

    A small rear rack was added, the handlebars were welded to the stem to stop children from inclining the "ape hanger" bars backward, thereby rendering the bicycle almost unsteerable. A drop-handlebar version, the Sprint GT, was produced 1972 - 1973 and this differed from the standard Mk 2 as it had a slightly taller frame.

  4. Step-through frame - Wikipedia

    en.wikipedia.org/wiki/Step-through_frame

    A step-through frame (also known as open frame, drop frame, or low-step frame) is a type of bicycle frame, often used for utility bicycles, with a low or absent top tube or cross-bar. [ 1 ] Since mounting or dismounting a step-through does not require swinging one leg to hip-height, they are widely used as delivery bicycles, and for other ...

  5. Bicycle frame - Wikipedia

    en.wikipedia.org/wiki/Bicycle_frame

    The 'diamond' frame's central, horizontal top bar forces the rider to swing a leg over the bicycle's seat. A Triumph step-through, ladies', or open frame Dursley Pedersen bicycle circa 1910 A penny-farthing photographed in the Škoda Auto Museum in the Czech Republic A Brompton folding bicycle Bicycle in Victorian Plymouth, England, with a predecessor of the Starley diamond-frame A cantilever ...

  6. Bicycle - Wikipedia

    en.wikipedia.org/wiki/Bicycle

    A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered or motor-assisted, pedal-driven, single-track vehicle, with two wheels attached to a frame, one behind the other. A bicycle rider is called a cyclist, or bicyclist. Bicycles were introduced in the 19th century in Europe. By the early 21st century there were more ...

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  8. Crossbar switch - Wikipedia

    en.wikipedia.org/wiki/Crossbar_switch

    A crossbar switch is an assembly of individual switches between a set of inputs and a set of outputs. The switches are arranged in a matrix. If the crossbar switch has M inputs and N outputs, then a crossbar has a matrix with M × N cross-points or places where connections can be made. At each crosspoint is a switch; when closed, it connects ...

  9. T-slot structural framing - Wikipedia

    en.wikipedia.org/wiki/T-slot_structural_framing

    Cross-section of 80/20 T-slotted profiles, 10 and 15 series A bicycle trailer for bike-trekking with three Euroboxes and aluminium profile framing T-slot structural framing is a framing system consisting of lengths of square or rectangular extruded aluminium, typically 6105-T5 aluminium alloy , with a T-slot down the centerline of one or more ...