Shimano SLX CS-M7100-12 Cassette

Shimano SLX CS-M7100-12 Cassette

Conquer any trail with absolute control and confidence. The Shimano SLX CS-M7100-12 is a high-performance, race-ready 12-speed mountain bike cassette that inherits top-tier technology from Shimano's elite Deore XT and XTR families. Delivering exceptional durability, fast shifting, and a highly competitive weight, the SLX cassette is engineered for modern trail riders, enduro racers, and demanding E-MTB setups who refuse to compromise on shifting precision under load.

Featuring a rigid and weight-optimised BEAM SPIDER construction, the CS-M7100-12 increases structural stiffness to lower inertia, ensuring instantaneous acceleration and highly responsive power transfer. Built around Shimano's lightweight Micro Spline freehub standard, this cassette accommodates an ultra-compact 10-tooth starter cog—maximising your high-speed potential while offering a massive, hill-flattening gear range.

Key Technologies

• Hyperglide+ Tooth Profile: The defining feature of Shimano's 12-speed revolution. Hyperglide+ guides the chain smoothly up and down the cassette gears. You can keep pedaling hard while shifting out of the saddle or clawing up a steep, technical climb without standard popping, grinding, or lag.

• BEAM SPIDER Construction: Minimises overall weight while maximising drivetrain stiffness. The lighter construction reduces wheel rotational inertia, allowing you to spin up to speed faster.

• Micro Spline Interface: Seamlessly integrates with modern Micro Spline freehubs, spreading mechanical torque more evenly across the aluminum splines to prevent freehub body wear and scoring.

Dual-Ratio Options for Your Riding Style

Tailor your gearing to match your terrain, fitness, and rear derailleur cage length. The SLX CS-M7100-12 is offered in two versatile ratios:

1. The 10-51T Ratio (Wide Range / Enduro Spec)

• The Perfect Choice For: Rugged climbs, heavy trail riding, and riders who want a "climb-anything" rescue gear.

• Gear Steps: 10-12-14-16-18-21-24-28-33-39-45-51T

• Why Choose It: Offering a massive 510% gear range, this setup ensures you never run out of options on steep forest walls. It utilises 11 durable steel sprockets and 1 lightweight aluminium climbing sprocket (51T) to save weight.

• Weight: ~534 g

2. The 10-45T Ratio (Rhythm Step / Cross Country Spec)

• The Perfect Choice For: Fast-paced XC racing, flatter trail networks, and riders who prefer smaller gear jumps to maintain a highly consistent pedaling cadence.

• Gear Steps: 10-12-14-16-18-21-24-28-32-36-40-45T

• Why Choose It: Providing a tightly spaced 450% range, this cassette minimises rhythm interruptions between gear changes. It is constructed from 11 steel sprockets and 1 lightweight aluminium sprocket (45T).

• Weight: ~513 g

Technical Specifications

• Model Series: SLX M7100 Series

• Speed Compatibility: 12-speed

• System Type: HG 12-speed (Hyperglide+)

• Spider Arm Material: Aluminium (1x Beam Spider)

• Sprocket Materials: 11x High-strength steel sprockets, 1x Lightweight anodised aluminium sprocket (largest cog)

• Compatible Chain: HG 12-speed (e.g., CN-M7100, CN-M8100)

• Freehub Body Interface: Micro Spline exclusively

Pros & Cons

• Hyperglide+ technology delivers flawless, incredibly fast shifting under full pedaling loads, both up and down the gears

• Stiff Beam Spider design saves weight, improves wheel acceleration, and ensures direct power transfer

• Dual-ratio offering lets you opt for either extreme climbing capability (10-51T) or tight cadence-holding rhythm (10-45T)

• Outstanding value—delivers nearly identical performance to Shimano XT and XTR at a fraction of the cost

• Highly durable nickel-plated steel cogs handle a lifetime of muddy, abrasive off-road abuse

• Only compatible with Micro Spline freehubs; will not fit traditional HG or SRAM XD freehubs

• Slightly heavier than XT or XTR versions as it uses 11 steel cogs instead of multiple aluminium or titanium sprockets

CS-M7100-12 User Manual

Shimano Warranty

All product warranties are in accordance with the manufacturer's policy (see link in the product details above). In most cases, this is a limited warranty that applies only to the original owner and excludes normal wear and tear, accidental damage, negligence (failure to clean/maintain the product), and improper installation (see User Manual link in the product details above). However, if you experience a problem with the product you purchased from bicyquel _ (original invoice required), please let us know so we can assist you with the appropriate procedure.