What Parts to get for your Bike

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This is guide is to help anyone who is building a bike or just upgrading or repairing there current bike, in this guide I will explain the difference between different products on the market. So assuming you know your budget and what your mainly going to use your bike for, now you can start looking at different parts.

Derailleurs, Cassettes, and Chains
The most common and practical set-up on any good bike will be 9 speed basically because you have all the gears you need on the back and you will rarely need to chain the front gears. There are allot of choices when picking Derailleurs you have the two major brands Shimano and SRAM in my opinion they are as good as each other but some do sway to SRAM as it doesn't move as much but it depends on what your doing with the bike. I personally use Shimano and have no problems, if you do go with Shimano make sure you stick with the Deora, Saint range as they are tought and high quaility products.

You need to know wheather you want a long cage rear derailleur of short deciding this isn't easy, again you need to know exactly what your going to do on teh bike. Long cage is used if your going to use all three front gears as you will need that extra tension in the chain when in bottom gear, your likely to use all three front gears if you are planning on dong cross country and mountain. A short cage Derailleur is used if you will only use one chain ring on the front and just use the rear gears, a short cage will be used in downhill as you dont need as many gears and will probably have a chain guide on the front. There are advantages and disadvatages of haveing long or short cage derailleurs, ther big advatages of short cage is it is less liekly to get damaged on the track, some people also say with a short cage the gears chainge faster and smoother, the disadvantage of short is you only have the amount of gears to play with as you have on the rear cassette. Long cage you have a bigger selection of gears and derailleurs as long cage is easier to get hold of, the disadvantage is they are bigger and closer to teh ground so are more likely to get damaged and dirty, they also weight more than short cage.

Cassettes, When chosing your cassette the factors that come into play will be the weight, amount of teeth, how long it will last and how smooth chainging gear will be. Also make sure you get products that are in teh same rage i.e if you have a Deora Derailleur try and and get a Deora cassette it wont matter if its LX,XT or XTR but more than likely they will work better than if you mix Shimano and SRAM products.

Chains, Chains follow the same rule as Cassettes you want a light chain but also a strong chain. with chains make sure you get a the correct speed chain so if you have a 9 speed get a 9 speed chain. the lenght of the chain wont matter as you can shorten it or buy more links, but remember if you have a short cage derailleur you will want a shorter chain. REMEMBER to buy a chain tool you can buy one for as little as £5 from WoolyHat shop on ebay. Also some spare chain pins will come in handy.

Bottom Brackets.
The bottom bracket is a reletivly cheap part of the bike but very important part. there are many different types it is a little confusing, and you have to be careful you get the right crank or it wont be compatible with your bottom bracket.
First thing you need to know when getting a bottom bracket is the size, you will need to measure the bottom bracket threads on the bottom of your frame across, the standard is 68mm and 73mm.  You then need to know how long you need it to be it know this you will need to know what crank set you will get and find out how long it is or what lengh the minimun will be.


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