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XT M8100 12 Speed Upgrade Kit with Sunrace 11-51T (SH+) Cassette and SRAM 12spd chain

Product codeSH_M811_Sunrace_KMC_12spd
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Shimano XT M8100 1×12-speed Upgrade Kit w Sunrace 11/51T cassette SRAM Chain

The Deore XT M8100 is Shimano’s newest weapon in search of mountain bike fun and adventure. As the first group of components designed specifically for mountain bikes ever, the Deore XT M8100 continues its success story based on high durability and reliable performance.

Scope of delivery

    • 1 Shimano XT SL-M8100 Clamp 12-speed Shift Lever right
    • 1 Shimano gear wire 2050mm and gear cable SIS OT-SP41 1800mm
    • 1 RD-M8100 (10-51)12-speed Rear Derailleur SGS
    • 1 Sunrace 12-speed Cassette Silver MZ903 – 11/51T
    • 1 SRAM GX 12 Speed Chain

The original mountain bike group continues its legacy: XT M8100 1×12-speed Group from Shimano

The original mountain bike group continues its legacy of remaining the standard for mountain bikers everywhere. Nearly three decades in, the DEORE XT brand is defined by its trail-tested durability, reliability and performance. Recognizing that today’s mountain bikers are riding faster and confidently on more technical terrain, the legacy of DEORE XT is more important than ever. In 2019, our pinnacle mountain bike technologies will trickle down to SHIMANO DEORE XT M8100.

Shimano XT SL-M8100 Clamp 12-speed Shift Lever

The Shimano XT SL-M8100 12-speed Rapidfire Plus shift lever with clamp construction features a lightweight, ergonomic and compact design. In addition to the shifting behavior, the performance also increases. With 20 % quicker lever access time and 35 % less force. Enhancing lever access and shifting speed, the new RAPIDFIRE PLUS shift levers offer light operation force and more versatility. Shimano’s new I-Spec EV lever design features greater flexibility in mounting for a clean and ergonomic cockpit. And for double chainring systems, the lever simplifies front shifting with a lightweight and compact design that shifts up and down with a single lever.


    • 20% quicker lever access time
    • Compact design and lightweight
    • Quicker lever access and light operation force maintains rider concentration
    • Greater flexibility and action-optimized cockpit layout
    • 2-WAY RELEASE for instant push/pull movements

Product features

    • Use: MTB
    • Group: XT M8100
    • Model: RD-M8100-R
    • Shifter Type: Rapidfire Plus
    • Mounting: Clamp
    • Gear rear: 12-speed
    • Optical Gear Display: No
    • Instant Release: Yes
    • Multi Release: Yes
    • 2-Way Release: Yes
    • Cable adjust: Yes


    • Main lever body: Aluminum Painted
    • Lever body:Aluminium, GFRP
    • Clamp bolt: Stainless steel


    • approx. 125g (manufacturer information)

Shimano XT RD-M8120 (10-45) / RD-M8100 (10-51) 12-speed Rear Derailleur

The Shimano XT RD-M8120/RD-M8100 12-speedrear derailleur features an elegant yet aggressive angled design and an attractive anodised aluminium surface. The derailleurs feature bigger 13-tooth pulleys and include Shimano’s proven Shadow RD+ low profile technology. The use of a single or a double system requires the installation of the specific single or double rear derailleur.


    • Shadow RD+ For optimal chain retention
    • RD-M8120-SGSWorks with 12-speed 10-45-teeth cassettes
    • RD-M8100-SGSWorks with 12-speed 10-51-teeth cassettes

Product features

    • Use: MTB
    • Group: XT M8100
    • Model: RD-M8120/8100
    • Mount: Direct Mount
    • Technology: Shadow RD+
    • Gradations:SGS-Type
    • Compatible chain:CN-M8100 12-speed
    • Max. teeth large sprocket:45/51T
    • Min. teeth large sprocket: 45T
    • Max. teeth small sprocket: 10T
    • Min. teeth small sprocket: 10T
    • Max. Front Difference:0T
    • Total Capacity: 41/45T

Pulley cage

    • Type-SGS long


    • Aluminum
    • GFRP
    • Stainless steel
    • Steel


    • approx. 284g – RD-M8100 (manufacturer information)
    • approx. 290g – RD-M8120 (manufacturer information)

SunRace MZ903 12-speed Cassette 11-51

The Sunrace MZ800 is a 12-speed cassette with 11-51T and is fully compatible with the standard freewheel hub. This is the solution for those who don’t have an XD freewheel and want to drive 1×12.

It is compatible with Sram XX1 Eagle, X01 Eagle and GX Eagle 12-speed rear derailleurs.

Product features – MZ903 12-speed cassette 11-51

    • Use: MTB
    • Suitable for Freehub: Shimano HG
    • Suitable for: 12-speed
    • Teeth: 11-51
    • Gradation: 11-13-15-17-19-21-24-28-33-39-45-51


    • Black


    • 510g (manufacturer information)

SRAM GX – 12 SPD Chain


The GX Eagle chain is designed with SRAM’s Eagle geometry. It features solid pin construction, Eagle PowerLock™ and smooth, efficient shifting that you can count on every time.




Application: XC, Trail, Enduro
Gearing: 12-speed


Technical Information:


Links: 126
Closure: PowerLock™ master link
Pin Type: hollow
Directional: yes
Recommended Groupset: SRAM GX Eagle
Material: steel


Gear Range



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