Shimano Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black

Q: Will this replace stx rc?

Yes it will as long as your low sprocket on your cassette is as least a 30t. There are cheaper Shimano derailleurs that will also work. What makes this one special is it can be used on a 1x setup with a 11-40T cassette.

Q: Will this replace an sis megarange?

A highly qualified "Yes". Be prepared to become a self-taught expert in bicycle derailleurs in the process. Expect to discover that you need other parts, such as a hanger-adapter. You will almost certainly need to replace your shifter cable and housing, as the cable entry is different, necessitating rerouting, and hence a different length cable and housing.

Product ID: 499632307

Secure Transaction

Details

Brand
SHIMANO
Colour
Black
Material
Aluminium
Mounting type
Braze-On Mount
Manufacturer
SHIMANO

🔧SGS Long Cage for max chain wrap

⚙️Double Servo tech for precision

🚴‍♂️7/8 speed drivetrain compatibility

Frequently Bought Together

Shimano Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black

KMC Chain 8SP X8-Silver/Grey - X8.93

SHIMANO Unisex Cshg4008140 CS HG400 8 Speed Cassette 11 40T, Silver, 40 Teeth UK

Description

⚙️ Shift into the future of smooth rides — don’t get left behind!

EFFORTLESS UPGRADE - Plug-and-play rear derailleur that fits a broad range of bikes, making your ride smoother instantly.
LIGHTWEIGHT DURABILITY - Crafted from robust aluminium, balancing strength and minimal weight at just 381 grams.
EXTENDED CHAIN CAPACITY - SGS Long Cage design supports up to 45 teeth, perfect for versatile riding styles and steep climbs.
SMOOTH SHIFTING MASTERY - Double Servo mechanism ensures ultra-precise gear changes, conquering any terrain with ease.
WIDE SPEED COMPATIBILITY - Seamlessly works with both 7 and 8-speed drivetrains, maximizing your bike’s performance range.

The Shimano Acera RD-M3020-SGS Rear Derailleur features advanced Double Servo technology for precise shifting, a long cage design supporting up to 45 teeth chain wrap, and compatibility with 7 and 8-speed drivetrains. Made from durable aluminium and weighing only 381 grams, it offers a reliable, lightweight upgrade for versatile cycling performance.

Specifications

UPC	192790897738
Color	Black
Size	SGS Long Cage
Material type	Aluminium
Number of items	1
Included components	Rear Derailleur
Batteries included?	No
Department	Rear Derailleur
Item model number	ERDM30208SGSL
Product Dimensions	17.81 x 2.13 x 10.31 cm; 381 g
ASIN	B0BGFBSYQ3

Have a Question? See What Others Asked

Will this replace stx rc?

Will this replace an sis megarange?

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products