will this work for 1X11- 51 Teeth drive terrain?

Yes. It's designed for 1x11 speed drive train. I use it on a 11-51 cassette.

Can I attach this 5100 w/o the G link which was part of my prior shimano deraillor?

It should bolt to your existing derailleur hanger.

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Shimano Deore Rd-M5100 Rear Derailleur

Product ID: 450501060

Details

Brand
SHIMANO
Colour
Black
Item weight
490 g
Material
Alloy Steel
Mounting type
Shimano Rear

⚙️1x11-speed precision shifting

⛰️Supports up to 51T max cog

🛡️Shadow RD chain stabilizer tech

C$9121

Duties & taxes included

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Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Shift like a pro, ride like a legend.

MAXIMIZE YOUR GEAR RANGE - Compatible with cogs up to 51 teeth, giving you the climbing advantage every time.
EFFORTLESS 11 SPEED SHIFTING - Experience seamless gear transitions with Shimano’s 1x11-speed drivetrain compatibility.
ROCK SMART LOW PROFILE DESIGN - Stay trail-ready with a sleek derailleur that resists damage from rocks and rough terrain.
CHAIN STABILIZER FOR SILENT RIDES - Minimize chain slap, drop, and noise with the innovative Shadow RD stabilizer system.
LIGHTWEIGHT YET DURABLE ALLOY BUILD - Crafted from premium alloy steel, balancing strength and weight at just 490g.

The Shimano Deore RD-M5100 Rear Derailleur is a high-performance 1x11-speed component featuring Shadow RD chain stabilizer technology for reduced noise and chain slap. Designed with a low-profile aluminum alloy body, it supports up to a 51-tooth cog, ensuring stable and reliable shifting on rugged trails. Weighing only 490 grams, it combines durability with lightweight efficiency, making it a top choice for serious mountain bikers.

Specifications

ASIN	B088XPFXGT
Best Sellers Rank	#68,774 in Sporting Goods ( See Top 100 in Sporting Goods ) #54 in Bike Shifters & Parts
Brand Name	SHIMANO
Case Material Type	Aluminum
Color	Black
Country of Publication	Germany
Customer Reviews	4.6 4.6 out of 5 stars (167)
Included Components	Rear Derailleur
Item Dimensions L x W x H	12.7L x 9.5W x 17.1H centimeters
Item Weight	490 g
Manufacturer	SHIMANO
Manufacturer Part Number	IRDM5100SGS
Material Type	Alloy Steel
Model Number	IRDM5100SGS 3/15
Mount Type	Shimano Rear Direct Mount
Number of Items	1
Number of Teeth	11
UPC	192790618708

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