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Sram Force Front
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 SRAM Force Front Derailleur Clamp on  US $59.95
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 SRAM Force 31.8mm Front Derailleur US $66.97
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 SRAM Force 34.9mm Front Derailleur US $70.16
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 SRAM Force Front Mech Gear Derailleur Clamp 34.9mm (MY10) US $64.99
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 SRAM 2010 Force 31.8mm Front Derailleur US $76.00
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 SRAM 2010 Force 34.9mm Front Derailleur US $97.98
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 SRAM Force Front Mech Gear Derailleur Braze-on (MY10) US $56.99
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 Sram Force Front Derailleur Clamp On 31.8mm New US $62.99
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Mountain bike gears are becoming more and more sophisticated. Nowadays it's not unheard of for a bike to have 27 gear ratios. Mountain bikes use a combination of nine different sized sprockets in the back and three in the front to create gear ratios.
The idea behind it is to allow the cyclist to crank the pedals at a constant pace regardless of the terrain the bike is on. It's easier to understand this by imagining the bike with only one gear. On your rotating the pedals once, the rear wheel undergoes one rotation too.
If the back wheel has a 26 inch diameter and the gearing ratio is 1:1, twisting the pedals one full time would result in the wheel covering 81.6 inches of ground. If you are pedaling at 50 RPM, this means the bicycle can cover over 340 feet of ground every minute. This is only 3.8 MPH, which is the same as a person walking. Cycling at this speed is perfect when trying to ascend a steep hill, although it's far from appropriate for going downhill.
If you want to go faster then a different ratio is required. If you wanted to cycle downhill at 25 MPH with a 50 RPM cadence at the pedals, you would need to have a 5.6:1 gear ratio. A bicycle with many gears also means you have lots of increments between a 1:1 gear ratio and a 6.5:1
gear ratio so that you will always be able to pedal at 50 RPM no matter how fast you are riding.
On normal 27 speed mountain bikes, six of the gear ratios are so close to each other that you can't notice any difference between them.
Most cyclists tend to choose a front sprocket appropriate for the slope they are cycling on and stick with it even though its tough moving the front sprocket under heavy weight. It is much easier to shift between the gears on the rear of the bike.
If you are trying to cycle up somewhere steep, you should choose the smallest front sprocket and after that shifting between the nine available back gears. The more speeds available on the back sprocket, the greater the advantage you will have.
Generally speaking, its the gears that decide your final speed. If your bike had no gears it would not have been possible for you to even pound your pedals, let alone build up some speed. The job of the gears is to move your pedals and help you build speed.
There are many different types of gears available in mountain bikes, all of which, if used the right way will help you build up a lot of momentum.
Interested in bicycle gears,uh?; Alison Addy is a consultant who writes on similar consumer topics for http://www.bikecyclingreviews.com . A website with tips on SRAM Force and SRAM Rival.
Installing a memory module in your computer
Installing a memory module in your computer is fairly simple, as long as you check a few things first.
The first thing you will have to do is shut down the computer, then remove the power cord from the computer. Once you have done that, you can then open the computer case (4 screws at the back normally) and slide the cover off to enable access to the motherboard, where the memory module sockets are. They are usually 2 or more long, multi-contact sockets with white or grey clips at each end. There should already be a memory module in one of the slots, as your computer won't work without memory.
Now, the easiest way to get the right type of memory module for your computer is to take out the one that is in your computer, take it to your local computer shop, and tell them you want the same type. Then all you have to specify is how many megabytes you want the new one to be, and you can then be sure you will get the right thing.
If you want to identify the memory module yourself, then the following guidelines and advice will be helpful.
PHYSICAL CONFIGURATION:
Memory modules come in quite a variety of physical sizes, depending on the age of your computer and the type of motherboard you have. Two of the most important characteristics to check are the number of "pins" or contacts that the module has. Very old computers have 30 pin modules, while newer computers have 168, 182 pin and greater sizes. The second physical characteristic to look for is the number of notches there are inbetween the pins. There are sometimes none, sometimes one and usually two, in newer computers. These notches are used to position the module into it's socket on the computer's motherboard.
TYPES OF MEMORY MODULE AND TERMINOLOGY
Memory modules are commonly referred to as RAM, or Random Access Memory. The various types you can get, from oldest to newest, are DRAM (Dynamic RAM) SRAM (Static RAM) EDO DRAM (Extended Data Out DRAM) SDRAM (Synchronous DRAM) DDR SDRAM (Double Data Rate SDRAM) and DDR2 SDRAM (A faster DDR SDRAM).
The older memory modules were known as SIMMs (Single Inline Memory Modules) and the newer modules are DIMMs (Double Inline Memory Modules - which have components and pins on both sides of the module's printed circuit board)
You must make sure that you get the correct type of module for your PC.
BUS SPEED
When you look at a memory module, it may have a label such as DDR400 on it, which means that it is DDR SDRAM which runs at a Bus Speed of 400MHz. You should try and get a memory module with the same bus speed rating. You can sometimes put a slower bus speed rating module in, but then any other faster modules will also be forced to run at the slower speed, which may downgarde your PC's performance slightly.
SINGLES AND PAIRS
Some computers only allow memory modules to work in pairs, so one module or three modules won't work. You will have to check your computer's manual or talk to your dealer about this, or check on the Kingston web site (See below)
HOW MUCH IS ENOUGH?
Computers love RAM. The more you give them, the faster they go. If you are running Windows XP you need about 512MB of RAM to avoid problems, and 4GB is a nice amount to have if you can afford it. Windows Vista needs at least 1GB and will be happier with 4 or 8GB of RAM. If you go bigger than 2GB, just be aware that Windows makes a file on your hard drive, called the paging file, which is at least as big as your RAM, so if you put in 8GB of RAM, you will probably lose about 10GB of Hard drive space.
WANT MORE HELP?
If you want more help, the Kingston web page is excellent. These are the people that manufacture memory modules, and they have memory calculators and utilities to check what kind of memory module your computer will use. You can find them at:
When installing the memory modules, make sure they are the right way around (check the notches line up nicely) and make sure that they clip into position securely with the clips at each end. Hold the modules on the edges, and try not to touch the gold coated pins, to prevent your body static from damaging the electronics.
Another helpful site is http://www.crucial.com
About the Author
Hi,
Thank you for reading my article.
There are many more articles, as well as lots of free information, software downloads, photos and advice at the Wrinklyo Web Node, which can be found at:
http://wrinklyo.googlepages.com
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Duncan Kelly
Shimano vs. Sram on my cervelo p2c?
so currently i run a very crazy mixed groupo. i am planning on having a groupo all the same. right now i have what i believe to be forte front and rear derailures, dura-ace chain, sram rival compact crankset (with 2 bent back into place teeth), lower grade sram cassette and dura-ace shifters on my p2c. i want to ask what would be a better choice, go ultegra derailures, cranks and cassette and keep the dura-ace chain and shifters? Or suck it up and pay a little more money for sram force derailures, cranks and cassette? will having the sram components with shimano chain and shifters be bad?
You already have top quality shifters, the most expensive part of the groupset. Chains are wear items that require replacement at regular intervals, so yours will need changing some time in the future, the cassette as well. If you have had bent teeth on your crank, you will need to replace the chainrings at the very least. If you choose to replace the crank, it is tough to beat the shifting performance of a Shimano crank. As for the derailleurs, they are probably made by Microshift for Performance with their Forte brand name. The derailleurs will make make much less difference to shifting performance than a new crank, they are probably similar in quality to 105. In any case, I would recommend that you go to Ultegra components, derailleurs, crank, and cassette, but odds are your chain needs changing as well unless it was changed within the last month or so.
Blogs Last updated: July 29, 10:31
Endurance racers, hang on tight and prepare for the oldest, 100-miler in the Kenda National Ultra Endurance (NUE) Mountain Bike Series, The Wilderness 101, in Coburn, Pennsylvania, not far from the town of State College.
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