Millimeters

December 28, 2009

Picking The Best Mountain Bike Wheels

Mountain Bike Wheels are generally composed of a specially-designed wire spoke system that allows for lightweight sturdiness, developed to give ideal performance even under harsh terrains and assorted riding conditions. These wheels are integrated into the mountain bike with dropouts which are held by the bike fork and bike frame.

Individuals who wish to start trail biking may be beaten by the options open to them, vis what accessories to buy, and just as importantly, what types of parts to use for one’s mountain bicycle. Mountain Bike Wheels provide a good mixture of traction, stability, and sturdiness ; and different riding conditions need particular kinds of trail bicycle wheels. Here are only some of the more favored mountain bike wheels currently available [*CO].

29-inch Wheels

29-inch mountain bicycle wheels are based on the widespread 622 millimeter standard. These types of wheels are rising in popularity for cross-country and cyclocross mountain bicycles, ordinarily employed by bigger riders. The 29-inch measurement relates to the diameter of the wheels, which are close in structure to the 700C hybrid, road, and touring wheels ; although the 29-inchers are structurally fortified for better sturdiness for off-road terrain riding. The usual 29-incher, along with the rubber tire itself, will have a total diameter of 724 millimeters or twenty-eight half inches.

26-inch Wheels

Clincher tires of the 26-inch size have inner tubes. These 26-inchers are the most common choice of wheels for off-road mountain bikes. The wheel structure was based on changed mountain bicycle wheels, which earlier riders took from mountain bicycles of American manufacture. 26-inch bike wheels sometimes have rims that are 22 inches or 559 millimeters in diameter, and make a total diameter of 665 millimeters or 26.2 inches with the tire attached.

Current tubeless 26-inch wheels are slowly penetrating the market. These new tires agree to the Universal System Tubeless, or UST standards, set by French wheel maker Mavic, together with tire corporations Michelin and Hutchison. As no more inner tubes are used in the tires of these bike wheels, the rider can enjoy more traction and shock assimilation, as lower tire pressure won’t result in punctures or apartments to the inner tube.

Conversion kits are available now to turn non-UST wheels into tubeless wheels, using a special tape to shut off any holes in wheels with standard edges, and injecting a liquid rubber compound prior to inflating the tire. UST kits can also improve durability of UST wheels with added sealing capacity in the event of any punctures.

BMX Wheels

BMX wheels are mountain bike wheels with the littlest diameters. These are designed for smaller and younger bikers, who are afforded better sturdiness at comparatively lower costs. The size can also bear heavier loads and stress due to bike stunts, and reduce rotational force for faster acceleration.

Top Mountain Bike Wheels

  • M:Wheel Shimano M475/Mavic XM317 Silver Front Wheel
  • M:Wheel Shimano Deore/Mavic XC717 Black Rear Wheel
  • Shimano XTR M965 Tubeless Valve Unit
  • Halo Freedom 29er Pro Disc Rear Wheel
  • DT Swiss XR 1450 Front Wheel
  • Shimano XT M776 Centre Lock Wheel Set
  • Fulcrum Red Metal 3 Wheel Set
  • Halo SAS Front Wheel
  • Shimano XTR M975 Front Wheel
  • Halo Purple Haze SAS Front Wheel

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November 28, 2009

Best Mountain Bike Forks

Changing your Mountain Bike Forks is a good way of upgrading your off-road bike. These days, forks usually come with suspension systems, to help with a bike’s handling and maneuverability on rougher terrain. Trail bicycle forks are classified according to the technology incorporated in them. Some bike forks include 4X and Jump suspension forks, Freeride / Mountain suspension forks, Freeride / downhill, XC suspension forks, and Cannondale Lefty’s. Each sort of suspension fork has its own benefits and downsides, and is developed for specific surfaces and uses. Heavy aspects of suspension forks include travel, which is the measurement for the movement of a suspension coil from action to rest.

Jump and 4X forks are sometimes short travel, coil-sprung forks. The coils move from eighty to 100 millimeters normally and are made to cushion heavy landings without too much front-end compression, enabling the rider to right away recover and continue riding. These are stable forks whose weights are directly proportional to their durability. These suspension forks are the most durable.

Freeride Lite or Mountain suspension forks travel more than cross-country forks, with movement up to around 6 inches at maximum. These forks are expectedly heavier than other fork types, rendering lockout even more serious. With these forks, most riders tend to go with coil-sprung forks vs air-sprung ones. The coils do make the forks heavier, yet less susceptible to damage once subjected to powerful impacts.

Freeride or downhill forks are ‘double-crown’ suspension forks which can move up to 10 inches in terms of travel. Lots of the forks with this technology have coil springs for more sturdiness. Freeride forks also enable the user to customize their ride by changing the springs, and therefore changing travel, which influences handling also. However downhill forks should not be used in cross-country bikes, as these bikes are not developed to withstand the pressure these forks give. Freeride forks can snap the frames of cross-country bikes.

XC cross-country forks usually have low degrees of travel, and are built for light weight. These single-crown suspension forks have, on average, from 80 to one hundred millimeters of travel. Forks built for cross-country bikes now increasingly employ air springs, whereby air pressure takes the place of elastometers or springs. Since these already mentioned elements are no longer present or needed, the bike’s overall weight is lighter. These sorts of suspension forks are also better to adjust. However some riders and makers still use elastometers and coil-sprung forks as these require less maintenance and take more punishment than XC cross-country forks.

Cannondale Lefty’s and Headshocks have newer suspension fork technology, which integrates all mechanisms inside the frame of the bike. The fork is reasonably reliable, with some topend variants coming with lockouts for easy adjustment. These forks generally result in more responsive handling, with active suspension and better traction.

Top Mountain Bike Forks

  • Marzocchi 888 Top Crown
  • Magura Odur Fork
  • RockShox Tora SL Coil Fork
  • RockShox Dart 3 with Pop Loc Fork OE 2009
  • Salsa CroMoto Rigid Fork
  • RockShox Reba Race 29er Dual Air Fork with Pushloc
  • Magura Menja Fork
  • RockShox Dart 2 Fork
  • RockShox Domain 318IS Coil AL Fork
  • Marzocchi 55 R 160mm (140) Travel Fork

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November 21, 2009

It’s Raining Cats and Dogs

Rainfall is measured in terms of millimeters or inches, and, depending on the amount that has fallen, is usually described as light, moderate or heavy rain. It is said to be light rain if the amount totals one tenth of an inch of rainfall per hour. This type of rain is only a sprinkle, and doesn’t get you very wet if you get caught in it. You definitely wouldn’t need a raincoat during light rain. During a moderate rain shower, you would probably get wet if you spent even a short amount of time outside. You would definitely need a raincoat or umbrella to keep the water off your clothes and hair. Moderate rainfall measures from one tenth to one third of an inch of rain in an hour. Meteorologists call it heavy rain if more than a third of an inch of rain falls in an hour. The term, “it’s raining cats and dogs” applies here because there is nothing like a heavy shower to make you run for cover, and fast.

A simple rain gauge is a low-tech method of getting a rainfall measurement and all that is required is a container, such as a cylinder with a flat bottom and straight sides. While this type of container can help you gauge whether it was raining cats and dogs, it is very difficult to measure small amounts of precipitation this way.

In order to measure rainfall precisely, the gauge should be located out in the open and away from tall buildings, trees and any other obstructions. Inaccurate measurements are taken if the gauge is too close to large, impeding objects. The science behind the gauges isn’t totally precise, as water that is blowing or falling off of structures can enter the gauge, showing that it was raining cats and dogs when in actuality, it was only a moderate rain shower.

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