JGbike Compatible MTB groupset for Shimano M8000 M7000 M5100 11 Speed shifters & Rear Derailleur, KMC X11 Chain,Sunrace 11-46T CSMS8 11-50T CSMX80, Shimano CSM8000/M5100 51T Cassette

Q: i have a 7 by 3 21 gear drivetrain right now. what do i have to do to figure out if this will work on my bike?

The cassette will not fit on a 7-speed hub. Replace the entire wheel with something compatible. Make sure the axle spacing matches your frame. You will also need to make this a 1 x 11. If you want to do a 2x11, get the option with the 11-42 tooth cassette. If you opt for the 2x11 , I would recommend the removal of the outer chainring, replace it with a chain guard to take up the outer step on the spider and protect your calf. This will give you a 32x11 top gear and a 22x46 low gear (I am assuming your crankset is a 22/32/42). If you opt for the 1x, you should just get a new crankset. An inexpensive one with a square taper should do the trick. I would suggest a 28 to 32 tooth front sprocket. Your choice depends on the terrain you plan to ride and your fitness. I noticed a response that says you need an XD adapter. I do not think this is the case. Get a Shimano 10/11/12 compatible hub and this cassette should slide right on.

Q: What chain do you recommend for this cassette ?

must use any 11 speed chain and 116L long. thanks. KMC/shimano/sram whatever,

Product ID: 235873098

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Details

Brand
JGbike
Colour
Shimano 126L
Material
Metal
Item weight
1.62 Kilograms
Mounting type
Clamp-On Mount

🔗Durable KMC X11 chain

⚙️11-speed precision shifting

⛰️Wide 11-51T cassette range

Frequently Bought Together

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Description

🚵‍♂️ Shift Up Your Ride, Own Every Trail!

EPIC HILL CONQUERING POWER - Tackle any terrain effortlessly with a wide-range 11-51T cassette, giving you the perfect gear ratio for steep climbs and fast descents.
SEAMLESS 11 SPEED SHIFTING - Experience ultra-smooth gear changes with Shimano’s RD-M5100-SGS derailleur and SL-M5100-R shifter, engineered for precision and reliability on every trail.
LIGHTWEIGHT DURABLE BUILD - Crafted from premium metal components, this groupset balances strength and weight for a responsive, agile ride.
UNIVERSAL UPGRADE COMPATIBILITY - Easily upgrade your 8-10 speed MTB to 11-speed without hassle, maximizing performance without buying a new bike.
PERFECT GIFT FOR CYCLING ENTHUSIASTS - Packaged for gifting, ideal for pro riders, weekend warriors, or anyone ready to elevate their mountain biking game.

The JGbike Compatible MTB Groupset is a high-performance 11-speed drivetrain kit featuring Shimano’s M5100 derailleur and shifter, a wide-range 11-51T cassette, and a durable KMC X11 chain. Designed for all-mountain bikes, it offers seamless gear transitions, broad gear ratios for tackling hills, and easy compatibility upgrades from 8-10 speed systems. Lightweight yet robust, this groupset is perfect for riders seeking reliable, cost-effective performance enhancements.

Specifications

Manufacturer	JGbike
Bike type	All Mountain
Color	Shimano M5100+KMC 126L
Size	11-51T Silver
Material type	Metal
Sport	Cycling
Batteries included?	No
Item model number	M5100-CSM5100-51T
Package Dimensions	21.8 x 21.6 x 14.2 cm; 1.62 kg
ASIN	B08CZ4LGZF

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