# Rear Derailleur Microshift MSH-RD-M21L, 6-7 speed (2/3x6/7), long cage, max 28–30T, min 13–14T, capacity 43T

**URL:** https://aio.lv/en/product--microshift-msh-rd-m21l--11853558
**Data updated:** 2026-03-09 17:29 (EET)
**Category:** Bicycle accessories
**Manufacturer:** Microshift
**Manufacturer code:** MSH-RD-M21L
**EAN:** 4710495436340
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 15.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--microshift-msh-rd-m21l--11853558

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Microshift MSH-RD-M21L is a rear derailleur designed for 6- and 7-speed drivetrains (compatible with 2x or 3x chainset configurations). It features a long cage for increased chain wrap, compatibility with Shimano-style systems, a maximum sprocket range of 28–30T, minimum sprocket 13–14T and a total capacity of 43T. Suitable for replacing or upgrading drivetrains on commuter, hybrid and touring bikes.

## Long description

Microshift MSH-RD-M21L is a rear derailleur designed for 6- and 7-speed drivetrains and intended for use with 2x or 3x chainset configurations. The unit features a long cage to increase chain wrap and stabilize shifting across a wide gear range. Engineered to work with Shimano-style systems, it supports large sprockets up to 28–30 teeth and small sprockets down to 13–14 teeth, providing a total chain capacity of 43 teeth. The derailleur is suitable for replacing worn components or upgrading gear systems on commuter, hybrid and touring bicycles.
Advantages
The long-cage design improves chain retention and maintains consistent derailleur tension across multiple chainring setups. Compatibility with common Shimano-style shift systems makes installation and adjustment straightforward for mechanics familiar with standard rear derailleur setups. The specified sprocket range and total capacity enable reliable operation with a broad selection of freewheels commonly used on older or value-oriented 6- and 7-speed bikes.
Suitable for
 Commuter bicycles with 6- or 7-speed drivetrains
 Hybrid and city bikes requiring durable, easy-to-service components
 Touring bicycles using 2x or 3x chainring configurations
 Replacement of worn or damaged rear derailleurs on compatible setups
Key specifications
 Compatible speeds: 6 and 7-speed drivetrains
 Chainring compatibility: 2x and 3x chainset configurations
 Cage length: long cage for increased chain wrap
 Maximum sprocket supported: 28–30 teeth
 Minimum sprocket supported: 13–14 teeth
 Total chain capacity: 43 teeth
 Shifter compatibility: Shimano-style indexing
How to use
Mount the derailleur to the bike’s derailleur hanger and align it according to standard rear derailleur installation procedures. Set the B-tension and high/low limit screws to match the cassette or freewheel size, and route the chain through the jockey wheels ensuring correct chain wrap. Connect the shift cable, adjust cable tension using the barrel adjuster, and test indexing across all gears, making fine adjustments to the limit screws and cable tension as necessary for smooth shifting.
Usage recommendations
Use with compatible 6- or 7-speed shifters and ensure the derailleur hanger is straight before installation. Periodic lubrication of pivots and checking cable condition will prolong service life. When pairing with larger sprockets near the stated maximum, verify B-tension to avoid contact between the upper jockey wheel and the largest sprocket.

## FAQ

### How much does the Rear Derailleur Microshift MSH-RD-M21L 6-7s long cage cost, and is it available for purchase?

The price is 18.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Microshift products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Microshift service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11853558/67251909_large.webp