Get Up to 70% Off Top Brands Plus an Extra 10% Off at Checkout Through 12/25

Over 2,000,000 Million Customers Served!!!

🚵‍♂️ Over 250,000 Positive Reviews 🚵‍♂️

Need Help? Click the Live Chat to Talk to a Gearhead 💪

Get Fast & Free Shipping on All Orders Within the Lower 48

SKU: RD0222

microSHIFT M21 Rear Derailleur - 6,7 Speed, Super Short Cage, Black

Vendor microSHIFT
Regular price $15.27
Sale price $15.27 Regular price $12.99
Sale Sold out
Unit price
/per 
Free Shipping All Day, Every Day

Chat with Support for Expert Advice

Manufacturer Warranty

This is a pre order item. We will ship it when it comes in stock.
Description

M21 rear derailleurs are designed to work with 6- and 7-speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs.

  • Robust composite and steel construction
  • Compatible with Shimano 6- and 7-speed mountain and road systems
Specifications

Rear Derailleur Mount Type10x1 Standard
Rear Der/Shifter CompatibilityShimano Mountain
Rear Der/Shifter CompatibilityShimano Road
Cage LengthShort
Drivetrain Speeds6
Drivetrain Speeds7
Weight241
ColorBlack
Chain Wrap Capacity (teeth)21
Largest Cog32

We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping!

The nitty gritty, for specific delivery timelines please pay attention to the delivery timelines on the product pages and the time frame estimated in the carts. If you need a part by a specific day, please contact us by chat, phone, or email.

  • Chat: Click the bubble on the bottom right side of the screen
  • Email: [email protected] or click contact us in the header to fill out a form
  • Phone: 603-968-5797

Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

We provide the you the ability to utilize multiple shipping & billing addresses, based upon what fits your current needs. However you are responsible to maintain and update any new address changes, as 365 Cycles will not be held liable for orders being shipped to an incorrect address.

      • Our Mistake: If we messed it up you can rest assured we are going to make it right. Contact us by email, phone, or chat and we will make your head spin with how quick we fix it
      • Warranty: We are an authorized retailer for everything we sell, so rest assured your product is covered under the manufacturer's warranty. Contact Us if you are having an issue and we will make sure you are taken care of
      • Just don't want it anymore: We have a 30-day return policy for orders within the US. We offer refunds on returned items that are brand new and in their undamaged, original packaging. Customers are responsible for the cost of return shipping. Damaged, installed, and used items as well as those without original packaging are not eligible for returns. If it's returned in this condition it may be denied and sent back to you

      If you need to return your order please email us at [email protected], call us at 603-968-5797, or use the live chat on our site.


      *Please allow up to 3 business days for us to process your return*

      365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

      Living an active lifestyle is just that, a lifestyle that never goes away and our goal is to always exceed your expectations so we can take this lifelong journey together. We strive to have the parts you need, at competitive prices with unmatched shipping speeds! 

      If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms. 

      Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at [email protected] with "CUSTOMER LOYALTY" in the title and I will personally handle your order. 

      Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

      If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

      Ben Berman Founder & CEO of 365 Cycles

      Company Core Values: 

      These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at [email protected] if someone you worked with has gone above and beyond in one of these areas. 

      Customer Dedication: Put yourself in their shoes and support those who support us.
      You Control the Outcome: "If it is to be, it’s up to me" You are personally responsible for controlling the outcome.
      Seek Understanding: It's easier to complain than it is to understand, avoid the easy route.
      Progress Not Perfection: Pick a direction, analyze the results, and be willing to change course.
      Will to Win: Customers, 365 Team, and Partners, all need the will to win. If they don't have that will, it's our job to give it to them.
      Keep Moving: Move the body, move the mind, and remove any hurdles to achieving an active lifestyle.
      Do the Right Thing: Doing the right thing is more important than doing the thing right.
      Stronger together: If you want to go fast, go alone, if you want to go far, go together. Get your team involved and become stronger together.

      Selected page contains no content. Add content to this page in the page editor.

      Shipping

      We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping!

      The nitty gritty, for specific delivery timelines please pay attention to the delivery timelines on the product pages and the time frame estimated in the carts. If you need a part by a specific day, please contact us by chat, phone, or email.

      • Chat: Click the bubble on the bottom right side of the screen
      • Email: [email protected] or click contact us in the header to fill out a form
      • Phone: 603-968-5797

      Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

      We provide the you the ability to utilize multiple shipping & billing addresses, based upon what fits your current needs. However you are responsible to maintain and update any new address changes, as 365 Cycles will not be held liable for orders being shipped to an incorrect address.

          Returns
          • Our Mistake: If we messed it up you can rest assured we are going to make it right. Contact us by email, phone, or chat and we will make your head spin with how quick we fix it
          • Warranty: We are an authorized retailer for everything we sell, so rest assured your product is covered under the manufacturer's warranty. Contact Us if you are having an issue and we will make sure you are taken care of
          • Just don't want it anymore: We have a 30-day return policy for orders within the US. We offer refunds on returned items that are brand new and in their undamaged, original packaging. Customers are responsible for the cost of return shipping. Damaged, installed, and used items as well as those without original packaging are not eligible for returns. If it's returned in this condition it may be denied and sent back to you

          If you need to return your order please email us at [email protected], call us at 603-968-5797, or use the live chat on our site.


          *Please allow up to 3 business days for us to process your return*

          About Us

          365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

          Living an active lifestyle is just that, a lifestyle that never goes away and our goal is to always exceed your expectations so we can take this lifelong journey together. We strive to have the parts you need, at competitive prices with unmatched shipping speeds! 

          If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms. 

          Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at [email protected] with "CUSTOMER LOYALTY" in the title and I will personally handle your order. 

          Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

          If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

          Ben Berman Founder & CEO of 365 Cycles

          Company Core Values: 

          These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at [email protected] if someone you worked with has gone above and beyond in one of these areas. 

          Customer Dedication: Put yourself in their shoes and support those who support us.
          You Control the Outcome: "If it is to be, it’s up to me" You are personally responsible for controlling the outcome.
          Seek Understanding: It's easier to complain than it is to understand, avoid the easy route.
          Progress Not Perfection: Pick a direction, analyze the results, and be willing to change course.
          Will to Win: Customers, 365 Team, and Partners, all need the will to win. If they don't have that will, it's our job to give it to them.
          Keep Moving: Move the body, move the mind, and remove any hurdles to achieving an active lifestyle.
          Do the Right Thing: Doing the right thing is more important than doing the thing right.
          Stronger together: If you want to go fast, go alone, if you want to go far, go together. Get your team involved and become stronger together.

          Contact Us

          Selected page contains no content. Add content to this page in the page editor.

          Customer Reviews

          Based on 5 reviews
          100%
          (5)
          0%
          (0)
          0%
          (0)
          0%
          (0)
          0%
          (0)
          B
          Brutus

          I purchased an old Tern Link seven speed folding bike that was a complete wreck. Among other issues the Shimano Tourney derailleur was a blob of rust. After I wasted money derusting it purchasing a new pivot bolt and shims for the pivot bolt etc. I noticed that there was a lot of friction when trying to pedal. Turns out the derailleur had been bent in an accident and was at an angle to the rear wheel inducing drag.

          The bike has only a singe chainring on the crank and the rear is 14-28T (28 minus 14 is only 14 tooth chain wrap capacity) so a short cage for quick shifts is ideal. Also since the wheels on the bike are only 20" in diameter it is desirable to have a short cage for as much road clearance as possible. It was a bit difficult finding a short cage derailleur at a decent price but this one is great. It seems like by the time the Revoshift hits a new number it has already shifted into that gear.

          I have many bikes and the Link is the one I want to use when I travel as it folds cost the least and looks like a beater so hopefully will be less prone to theft. But now it is the most responsive bike I have. It's really nice not having to wait for it to shift while negotiating traffic like with long cage derailleurs.

          The deraileur took around ten minutes to install. The cable feed is towards the bottom rear so it needs more cable sleeve than the Tourney (where the feed was at the top rear). Fortunately I had left a few extra inches of cable sleeve on the bike. Interestingly around six inches of the the cable itself needed to be clipped off upon installation. There is very little naked cable after the sleeve enters the housing. So if you find the cable sleeve to be too short you probably will only need a new sleeve but not a new cable.

          All in all I was very happily surprised by the quality of this derailleur and the improvement it made on my bike.;

          u
          user1

          Good for 7 speed. It is quiet and easy to tune.

          u
          user1

          Good for 7 speed. It is quiet and easy to tune.;

          D
          Dynamic Bicycles

          The derailleur body and internals are made primarily of steel including where the set screws are used to set top-bottom range. This made the setup easy and gives a sense of durability. At this price point everything on a Shimano derailleur is plastic. This Microshift setup shifts fast and smooth and I like the compact short cage design. Initial rides have been really enjoyable. Nice replacement for lower end Shimano derailleur.

          D
          Dynamic Bicycles

          The derailleur body and internals are made primarily of steel including where the set screws are used to set top-bottom range. This made the setup easy and gives a sense of durability. At this price point everything on a Shimano derailleur is plastic. This Microshift setup shifts fast and smooth and I like the compact short cage design. Initial rides have been really enjoyable. Nice replacement for lower end Shimano derailleur.;