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.

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

Product ID: 476106412

Details

Brand
SHIMANO
Colour
black / black
Item weight
0.39 Kilograms
Material
Aluminum
Mounting type
Braze-On Mount

🔧SGS Long Cage for max chain wrap

⚙️Double Servo tech for precision

🚴‍♂️7/8 speed drivetrain compatibility

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€ 89.68

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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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, elevating your ride instantly.
LIGHTWEIGHT DURABILITY - Crafted from robust aluminum, balancing strength and minimal weight at just 381g.
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 adaptability.

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 aluminum and weighing only 381g, it offers a reliable, lightweight upgrade for versatile cycling performance.

Specifications

ASIN	B0BGFBSYQ3
Best Sellers Rank	#104,848 in Sporting Goods ( See Top 100 in Sporting Goods ) #128 in Bike Shifters & Parts
Brand Name	SHIMANO
Case Material Type	Aluminum
Color	black / black
Customer Reviews	4.7 4.7 out of 5 stars (182)
Included Components	Rear Derailleur
Item Weight	0.39 Kilograms
Manufacturer	SHIMANO
Manufacturer Part Number	ERDM30208SGSL
Material Type	Aluminum
Model Number	ERDM30208SGSL
Mount Type	Braze-On Mount
Number of Teeth	45
UPC	192790897738

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€ 89.68

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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