Chain Replacement
Significant use, decreasing shift performance, corrosion, or a broken link are all signs that may mean you will need to replace your chain. Most Aventon e-bikes are 7/8 speed bikes. When replacing the chain on a bike there are two main factors to consider: chain speed and chain length. Matching the chain speed is as simple as counting the amount of rear cog gears that you have on your rear wheel. An 8-speed bike will use an 8-speed chain, a 10-speed bike will use a 10-speed chain, and so on. Note: 7 and 8 speed bikes may share the same size of chain. When purchasing a chain, it will be labeled as such. As for the length, if you do not have the spec of the original chain, you can count the links on your current chain to ensure you purchase one large enough. To count the links, each outer and inner link all count as "1" (as pictured below)
You can easily shorten the chain before installation if you purchase a chain with more links than needed. We recommend you purchase a quality chain breaker tool as linked here: https://www.parktool.com/en-us/product/chain-tool-ct-3-2?category=Chain When installing the new chain, it will either come with a master link or a master pin to make the connection. If using a master link, you will need an inner link on either end and the master link will need to be counted as a "link". For chains with a master "pin", you will end up with one outer link and one inner link. The master pin will connect the final inner link to the outer link on the opposite end. Depending on the manufacturer of the chain, follow their provided instructions for the master link or pin application.
Below are some examples of master links and chain pins:
The excess piece of chain pin gets snapped off at the "bevel" once installed as shown below:
Below is a video by Park Tool showing how to install a new chain: