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rattleCAD — is a parametric 2D CAD software specific for bicycle design, [1] [2] in particular for design bicycle frame, [3] [4] developed by the Austrian cyclist and programmer Manfred Rosenberger since 2008. [5]
Most bikes have positive trail, though a few, such as the two-mass-skate bicycle and the Python Lowracer, have negative trail. [ 12 ] Trail is often cited as an important determinant of bicycle handling characteristics, [ 13 ] [ 14 ] and is sometimes listed in bicycle manufacturers' geometry data.
According to a study a human at 70 kg (150 lb) requires about 60 watts to walk at 5 km/h (3.1 mph) on firm and flat ground, [6] while according to a calculator at kreuzotter.de the same person and power output on an ordinary bicycle will travel at 15 km/h (9.3 mph), [7] so in these conditions the energy expenditure of cycling is about one-third ...
A Rohloff Speedhub hub gear A Shimano XT rear derailleur on a mountain bike A bicycle gearbox with chain tensioner. Bicycle gearing is the aspect of a bicycle drivetrain that determines the relation between the cadence, the rate at which the rider pedals, and the rate at which the drive wheel turns.
Pace [6] in minutes per kilometre or mile vs. slope angle resulting from Naismith's rule [7] for basal speeds of 5 and 4 km / h. [n 1]The original Naismith's rule from 1892 says that one should allow one hour per three miles on the map and an additional hour per 2000 feet of ascent.
Experts explain the best time of day to go on a walk, depending on your goals from weight loss to digestion. There are benefits for morning, afternoon, and evening walks.
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Bikes exist that blur the distinction by combining attributes of both, however. One example of this is a Monstercross bike, often using a standard mountain bike frame intended for use with 26″ wheels with 700c [citation needed] wheels and 700 × 38c-45c tires, disc or cantilever brakes, MTB or cross gearing, and the drop bars of a cyclocross ...