16 INCH BICYCLE WHEEL

ponedjeljak, 28.11.2011.

MOUNTAIN BIKE DERAILLEURS - MOUNTAIN BIKE

Mountain bike derailleurs - Megahorn bike horn - Mongoose 20 boys bike

Mountain Bike Derailleurs

mountain bike

A bicycle with a light sturdy frame, broad deep-treaded tires, and multiple gears, originally designed for riding on mountainous terrain

a bicycle with a sturdy frame and fat tires; originally designed for riding in mountainous country

(Mountain biking) Mountain biking is a sport which consists of riding bicycles off-road, often over rough terrain, using specially adapted mountain bikes. Mountain bikes share similarities with other bikes, but incorporate features designed to enhance durability and performance in rough terrain.

(Mountain Biking) A designated, rugged, natural surfaced, single track trail that offers a range of riding opportunities.

derailleurs

(Derailleur) Gear?shifting mechanism on a bicycle.

A bicycle mechanism that moves the chain out and up, allowing it to shift to different cogs

Derailleur gears are a variable-ratio transmission system commonly used on bicycles, consisting of a chain, multiple sprockets of different sizes, and a mechanism to move the chain from one sprocket to another.

(derailleur) (Say: dee - ray - lure) - Also called a "shifter" or in England, a "mech," a derailleur is a mechanism that literally derails the chain moving it to another cog or chainring. There are rear and front derailleurs. The rear shifts the chain across the cogs.

DriveTrain Upgrade: Rear Derailleur in Pieces

Pretty simple setup for the SRAM X.9 rear derailleur. The bottom sprocket (right) runs on a fairly simple bearing and is held between two machined round plates. This was inexplicably packed with something that seemed to resemble petroleum jelly. I cleaned it out completely, lubed the bearing properly, then sealed the area around the bearing with proper bike lube.

The upper sprocket really doesn't have anything that one would formally call a "bearing" The plastic sprocket rotates on a simple metal hub and are held together between two simple stamped metal plates. I just cleaned it all up, lubed lightly and put it back together.

Drivetrain Upgrade: Dirty Rear Derailleur

While I had the chain off, I took the opportunity to check the state of the derailleur. Generally good, but the sprockets were messy and weren't moving quite as well as I thought they should.

Two simple hex-key screws removed both of the sprockets and their bearings along with the cage guard. Nice and simple which is one of the reasons I like SRAM stuff better than "brand Sh".

- 19:50 - Komentari (0) - Isprintaj - #

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16 INCH BICYCLE WHEEL
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