How Many Chain Links on an ENGWE M20 E-bike

Understanding ENGWE M20 Chain Length

Proper chain length is essential to good drivetrain performance, and not maintaining the proper chain length can cause excessive wear on your ENGWE M20 electric bike’s drivetrain components. A typical number is a great starting point; however, the count can vary depending on a few variables. That’s where your faithful CoolTechMotosports writers come in, as they are about to provide you with the answer and knowledge to measure, select, and replace your chain properly so that your M20 stays adventure-ready!

The ‘correct’ amount of chain links that makes a necklace the perfect length is not one-size-fits-all, but there is a standard starting point. For a bike frame like the M20, the frame design has a particular type and number of chain links for its 7-speed gear train, so the normally factory-provided chain length is about 116 links. This is the most popular length for many multi-gear bicycles, which means it’s a good place to start. Though, the purchase of a 116-link chain may not be the end-all, be-all. Knowing all the factors at play with this accessory is what will ensure that your electric bike fits you perfectly and gives top performance.

Things to Consider When Verifying the Standard Length:

• Stock Drivetrain: If your ENGWE M20 is stock (Shimano 7-speed cassette, chainring, and derailleur), 116 links should be the correct size.
• New Bike Condition: The perfect chain length comes from the manufacturer on a new bike.
• Reference Point: This is the number that you aim for when sizing a new, longer chain that needs to be shortened.

Caveats to Changing the "Exact" Number:

• Chain Stretch: As chain pins and rollers wear out, the chain "stretches" or becomes longer in pitch. An old chain, even with the same link count as a new chain, may physically be longer. This is why copying your current chain's length might not be appropriate if it's very worn.
• Drivetrain Wear: Excessive wear on the cassette cogs or front chainring may slightly impact how the chain sits, but if these components are severely worn out, you should be replacing them when replacing the chain as well.

How to Measure Your E-Bike Chain: Two Pro Methods

To get it perfect, the best way is to measure the length yourself. Whether you have the old chain or are beginning anew, there are two pro methods you can use at home. The first and most precise method is to use your original chain as a template. This is ideal if your bike was shifting well before your chain wore out. The second way is necessary if you do not have the old chain anymore or are even installing a completely new drivetrain. Either way, both methods are no-brainers and will ensure that your chain is not too long—which leads to dropping the chain and poor shifting—or too short, causing undue stress on your derailleur and wearing out other parts of your drivetrain.

Method 1: The Comparison Method (Using the Old Chain)

1. Carefully detach your old chain from your ENGWE M20.
2. Position your old chain on a flat surface or hold it beside the new chain.
3. Match up the chains one link at a time so that they begin from the same spot.
4. Find the matching link on your new bike chain and use a chain breaker/chain tool to push out the pin on the next link. This guarantees your replacement chain will be the same length as your original chain.

Method 2: The Sizing Formula (If you don't have an old chain)

1. You will NOT want to be routing the chain through the rear derailleur for this step.
2. Loop the new chain over the largest cog on the rear cassette and then over the front chainring.
3. Tighten the chain, and make a note of the point where each end meets.
4. From this meeting point, add two more links (one inner link and one outer link). This is the right place to cut. This extra length is added for the path the chain takes through the derailleur pulleys.

ENGWE M20 Drivetrain Specifications and Features

ENGWE M20

Full Suspension Fat E-bike That Looks Like a Motorcycle

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The ENGWE M20 is an electric bike catered for adventure, providing the most fun and freedom on two wheels. Designed with the spirit of adventure in mind, it combines a strong motor with sturdy parts to take on all level surfaces. It’s human-powered Shimano 7-speed system means you can shift on the fly and is easy to use. So, whether you’re going up a hill or just cruising down a flat street, you’ll always be in control! It's no random pick either - this system is carefully matched to work with the high-torque brushless motor in delivering every ounce of power to the giant, extra-grippy tires. The fact that these parts work together so well is an endorsement of ENGWE’s commitment to a smooth ride, and this makes the M20 a solid choice for anyone who likes their bikes both beautiful and functional.

The ENGWE M20 Key Drivetrain & Performance Features:

• Shimano 7-Speed Drivetrain: This drivetrain provides a smooth ride and allows you to select the right gear no matter what angle of incline you’re on.
• High Torque Brushless Motor: The force exerted on the bike is a result of the push factor behind it, and the motor with 55 N.m torque does just that, while the transfer of this push from the motor to the rear wheel is managed by the chain.
• 20x4.0 Triple-Layer Suspension Fat Tires: The drivetrain will need to be durable enough to take on the super grip and forces with these massive tires.
• Dual Suspension System: By allowing the rear wheel to move up and over bumps, the suspension frees you from the ‘chain slap’ that would otherwise come with rigid frames while helping your bike maintain traction on bumpy surfaces.

Chain Compatibility and Required Tools

To begin a chain replacement, you’ll need some basic tools and the proper replacement chain. You need a chain which is perfect for the Shimano 7-gear train system of the ENGWE M20. The good news is that the market standard for 6, 7, and 8-speed systems are pretty much uniform, so you have a lot of room to play. The first step is to ensure you buy a chain with at least 116 links, as while you can always remove links from a too-long chain, you can't add them on. When you do get your chain, I'd recommend getting a "master-link" or "quick-link" type chain, since it will be much easier to install. A few brand names come to the fore that make good-quality chains that are suitable for this purpose.

Chain Compatibility Checklist:

• Speed Rating: Must be a 6, 7, 8-speed compatible chain.
• Length: At least 116 links. No problem if you purchase a longer chain (say 126 links) and reduce it.
• Connector: Get a master link for easy, tool-free installation and removal in the future.

Reliable Chain Makers:

• KMC
• Shimano
• SRAM

MUST-HAVE CHAIN REPLACEMENT KIT

• Chain Breaker Tool: You will absolutely need one of these. It is used to "break" the chain at the proper length and, if you don't have a master link in the old chain, to remove it.
• Chain Wear Indicator: A very handy, inexpensive tool. It enables you to gauge chain stretch so you can purchase a replacement chain *before* your old one wears out the more expensive cassette and chainring, saving money in the long run.
• Master Link Pliers: Not an absolute necessity if you follow our instructions to a ‘T’, but your life will be a whole lot easier when connecting and disconnecting the master link.
• Degreaser, Rags, and Chain Lubricant: To clean your drivetrain and lube up the new chain.

Step-by-Step Chain Replacement Guide and FAQs

Replacing the chain for your ENGWE M20 is a simple task that takes less than 30 minutes and can be accomplished if you have the two essential tools. Your most important assets: a clean workspace and some method. If you follow these steps, your new chain will be installed correctly the first time, which is important if you want to churn out thousands of relatively trouble-free miles. Safety first; if in doubt, consult with a professional bike mechanic. A pro tip: Taking a picture of the rear derailleur before you remove the old chain will help you make sure you route the new one properly.

Step-by-step illustration of removing the chain:

1. Cross-Chain to the Smallest Gears: Shift the front derailleur to the smallest chainring and the rear one to the smallest cog possible. This is the point of maximum slack in the chain.
2. Break the Chain: Find the master link or use your chain breaker tool to break a link of the chain.
3. Take a Picture: Take a picture of the routing you used for the chain through the two pulleys on the rear derailleur cage.
4. Remove the Chain: Gently extract the old chain from the drivetrain and set it aside.

New Chain Installation Step-by-Step:

1. Determine Length: Determine your new chain's length. Find the correct chain size for your bike using one of the two methods explained earlier in this article.
2. Route the Chain: With the photo in hand, carefully pull the new chain through your front derailleur, around the cassette, and through the rear derailleur cage. Ensure that it is running through the pulleys properly.
3. Connect the Chain: Reconnect the two ends of the chain with a new master link. Insert the master link and pull hard on the pedals so it clicks tightly into place.
4. Check Movement: Give the pedals a few turns to make sure everything is moving nicely.
5. Lubricate: Apply a good chain lube to the rollers of the new chain.

How many chain links are used in an ENGWE M20 as standard?

I never even rode the bike with 116 links. This is not as common, but the only way to know for sure is to count the links in your current chain or size the new chain onto the bike.

How frequently should I change the e-bike chain?

With a chain wear tool, you will be able to check this. The recommendation is that the chain should be replaced when it has worn out 0.5-0.75% on your measuring tool, which you will find to be between roughly every 1,000-2,000 miles or so if you want to avoid premature chainring and cassette wear.

Can I use any 7-speed chain on my M20?

Yes, any good chain from a trusted manufacturer intended for a 6/7/8-speed system will work with your ENGWE M20's Shimano 7-speed system.
The good news: A little chain TLC goes a long way, and proper chain maintenance will help you get the most out of your eBike adventures.