Bicycle Chain Tips

All bicycle chains are not the same. While all bike chains have the same half inch "pitch" (length of the link), the width of the chain will vary depending on how many gears your bike has. Single speed bikes like BMX and Beach Cruisers will have the widest chain. This wide chain will not work on bikes with multiple cogs on the rear wheel.

Your chain should be matched to the number of gears that you have. Up to 8 gears (on the rear wheel) will use an 8-speed chain. 9 gears require a 9-speed chain and 10 speed cassettes require use of a very narrow 10-speed chain.

Most bikes are equipped with chains that will require the use of a chainbreaker tool to open a link so the chain can be removed. This tool can be obtained at bike shops and sporting goods stores for about $10. The tool is used to push out one of the pins that holds the links together. When using the tool, be certain not to completely push the pin out otherwise reassembly will be very difficult.

We do not recommend reusing your original chain, even if the bike is brand new. We strongly recommend replacing your existing chain with a SRAM Powerlink chain of the appropriate width. The Powerlink chain uses a snap-together master link rather than a pin that is pressed in and out with the chainbreaker tool. This type of chain is much stronger and easier to work with if you need to make changes or repairs. An added benefit is that the stock SRAM chain is usually long enough that you do not need to purchase two chains in order to have enough extra length to go around the motor sprocket and idler. The 8-speed SRAM Powerlink chain is a SRAM PC-68 and the 9-speed unit is a PC-951. Online discount bike parts sources sell these chains for about $20-25ea. The Powerlink is included with the chain and does not need to be purchased separately.

It is important to note that over time, all chains will wear and stretch and should be replaced about every 1,000 miles or sooner if you notice wear, noise or binding. To keep things running smoothly, you can lightly oil your chain with a light spray oil like Tri-Flow. Your chain should be lightly oiled, not dripping with oil. Also, it is not necessary to oil the rear gears. Doing so will not help performance and will only make more dust and dirt stick to the cogs. The cassette should be cleaned frequently with a brush or the special tool that is sold for cassette cog cleaning.