TNi Aluminum Cog Nickel Black 11s (12-25T) Used | Aluminum Sprocket for Riders Seeking Lighter Weight

Only 113g. An ultra-light 11-speed aluminum cog for hill climbs and race-day performance.

Lighter, faster. TNi's aluminum cogs are made for riders who pursue these ideals.

Featuring CNC-machined 7075 aluminum, this 12-25T cog achieves an impressive reference weight of just 113g. This allows for significant weight reduction compared to typical steel sprockets, providing a major advantage in hill climbs and race scenarios.

The close-ratio configuration of 12-13-14-15-16-17-18-19-21-23-25T is also ideal for road riders who want to maintain a precise cadence. The unique presence of the black nickel finish is another attractive feature.

Unlike manufacturer-original sprockets, this is a competition-oriented part that prioritizes weight reduction. It will deliver its full performance when used with proper adjustment and regular maintenance.

Features

• Features CNC-machined 7075 aluminum cogs
• Ultra-lightweight design with a reference weight of 113g
• Ideal for hill climbs and racing
• Close-ratio configuration for easy cadence maintenance
• Compatible with Shimano 11-speed freehubs
• Lockring included
• Unique appearance with black nickel color

SPEC

• Manufacturer: TNi
• Product Name: Aluminum Cog Nickel Black
• Number of Speeds: 11-speed
• Compatible Freehub: Shimano 11s
• Cog Configuration: 12-13-14-15-16-17-18-19-21-23-25T
• Gear Range: 12-25T
• Material: CNC Aluminum 7075
• Color: Nickel Black
• Reference Weight: Approx. 113g
• Accessories: Lockring
• Condition: Used, Excellent

Usage Notes

• This product is a lightweight component designed for race use.
• Durability and shifting performance may be inferior to manufacturer-original sprockets.
• Precise rear derailleur adjustment is required.
• Recommended for use with new SHIMANO or KMC high-end chains.
• Please ensure the chain moves to the correct cog during shifting.
• Improper use may cause tooth wear, damage, or chain skip.

The biggest appeal of this model is its lightness. At 113g, it is exceptionally light compared to typical sprockets and greatly contributes to weight reduction for hill climbs and race-day wheels.

However, since this product prioritizes weight reduction over durability and shifting performance, careful adjustment and maintenance are essential. This part is better suited for events, races, or hill climbs rather than everyday use.

The condition is good, and opportunities to find this item are rare nowadays. This is a must-see item for those who are particular about weight reduction.

※As this is a used item, there may be minor scratches from use and storage. Please check the product images for detailed condition.