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.

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.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

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

Product ID: 481941776

Details

Brand
SHIMANO
Color
Black
Item Weight
0.39 kg
Material
Aluminum
Mounting Type
Braze-On Mount

🔧Long cage with 45T chain wrap capacity

⚙️Double Servo mechanism for precision shifting

🚴‍♂️Compatible with 7/8 speed drivetrains

8972 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

Description

⚡ Shift Like a Pro, Ride Like You Own the Road!

EXTENDED GEAR RANGE - Long cage design handles up to 45 teeth, perfect for tackling varied terrains.
TRUSTED PERFORMANCE - Backed by Shimano’s 2-year warranty and a stellar 4.7-star rating from riders worldwide.
LIGHTWEIGHT DURABILITY - Crafted from robust aluminum, balancing strength with minimal weight (0.39 kg).
VERSATILE COMPATIBILITY - Seamlessly fits 7 and 8-speed drivetrains for broad bike compatibility.
PRECISION SHIFTING MASTERY - Double Servo mechanism ensures ultra-smooth, accurate gear changes every ride.

The Shimano Acera RD-M3020-SGS Rear Derailleur is a high-performance, long-cage derailleur designed for 7 and 8-speed drivetrains. Featuring Shimano’s Double Servo mechanism for precise shifting and a 45-tooth chain wrap capacity, it offers versatile compatibility and durability with its lightweight aluminum construction. Ideal for cyclists seeking reliable, smooth gear transitions backed by a trusted 2-year warranty.

Specifications

ASIN	B0BGFBSYQ3
Best Sellers Rank	#73,500 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #29 in Rear Bike Derailleurs
Brand	SHIMANO
Brand Name	SHIMANO
Case Material Type	Aluminum
Color	Black
Customer Reviews	4.7 out of 5 stars 189 Reviews
Included Components	Rear Derailleur
Item Weight	0.39 Kilograms
Manufacturer	Shimano
Manufacturer Part Number	ERDM30208SGSL
Material	Aluminum
Material Type	Aluminum
Model Number	ERDM30208SGSL
Mount Type	Braze-On Mount
Mounting Type	Braze-On Mount
Number of Teeth	45
UPC	192790897738
Warranty Description	2 years

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

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

8972 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

View all Trustpilot reviews