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Freestyle fixed gear is stunt riding on a fixie. It is an extreme sport where the stunts share elements from BMX , artistic cycling , dirt jumping , and trials . The flat ground style of tricks, similar to artistic cycling , is called Trick-Track or Tarck.
A track bicycle or track bike is a form of fixed-gear bicycle optimized for racing at a velodrome or at an outdoor track. Some road racing and club cyclists use a fixed-gear bicycle for training during the winter months, generally using a relatively low gear ratio, believed to help develop a good pedalling style. [5]
Bicycle chains used in track, fixed gear and single speed cycling come in two common roller widths (the internal width between the inner plates), which is either 2.38 mm (3 ⁄ 32 in) or 3.18 mm (1 ⁄ 8 in). The chainring, sprocket and chain should all be the same width.
A 2021 map shows the impact of a tsunami hitting the San Fransisco area - and the devastation it could cause. The map was thrust back into the spotlight Thursday when a 7.0-magnitude earthquake ...
The Lituya Bay megatsunami caused damage at higher elevations than any other tsunami, being powerful enough to push water up the tree covered slopes of the fjord with enough force to clear trees to a reported height of 524 m (1,719 ft). [9] A 1:675 recreation of the tsunami found the wave crest was 150 m (490 ft) tall. [14]
There are several different types of flip flop hubs available for different applications. Their main purpose is to allow changing between two (and only two) different gear ratios on one rear wheel without the added complications of a multi-gear derailleur or internal hub gear, or between fixed and freewheel options. By removing the rear wheel ...
Gear retraction of a Velocity on takeoff. The Velocity XL is 12 in (310 mm) longer and has a 20 in (510 mm) greater span than the SE. [3] The standard XL has a cruising range of 875 nautical miles (1,620 km; 1,007 mi) and a 75% power cruising speed of 185 knots (213 mph; 343 km/h) air speed.
[9] [10] The tsunami warning was issued within 3 minutes with the most serious rating on its warning scale during the 2011 TÅhoku earthquake and tsunami; it was rated as a "major tsunami", being at least 3 m (9.8 ft) high. [10] [11] An improved system was unveiled on March 7, 2013, following the 2011 disaster to better assess imminent tsunamis.