Gates 21R4140 Automatic Continuously Variable Transmission (CVT) Belt - Drive Belt

Gates G-Force RedLine CVT Belt Overview

The Gates G-Force RedLine CVT Belt is a power sport specialty, high-performance continuously variable transmission belt built for demanding drivetrains. Part number 21R4140 uses an OE-improved design with aramid cord, EPDM belt material, and a double-notched construction to support stronger acceleration and reduced energy loss in severe off-road use.

For buyers searching for a Gates CVT belt for UTV and side-by-side applications, 21R4140 is part of the G-Force RedLine line developed for performance-focused CVT systems. It is a black, fabric-bottom, notched belt with a 26-degree angle, 1.219-inch top width, 1.134-inch pitch width, and 42.625-inch outside circumference.

Key Features

• Gates G-Force RedLine CVT Belt for high-performance CVT drivetrains
• Part number 21R4140 for application-specific replacement searches
• Aramid cord material for strength and stability under load
• EPDM belt material with double-notched construction
• Fabric bottom and notched profile for CVT operation
• OE-improved comparison rating
• Dimensions: 31 mm top width, 15.9 mm thickness, 1083 mm outside circumference

Product Line Details

The Gates G-Force RedLine CVT Belts line is positioned for performance CVT systems that see higher load, heat, and speed demands than standard service use. Gates engineered this belt family to reduce speed-ratio loss and energy loss in extreme off-road environments while supporting stronger acceleration and higher top speed potential in the right application.

Detailed Description

Gates 21R4140 is a continuously variable transmission belt built for power sport specialty use. Its aramid reinforcement, EPDM construction, and double-notched profile are selected to handle the operating demands of CVT-equipped vehicles where belt consistency and heat resistance matter. The belt’s RVS-R section, 26-degree angle, and OE-improved design make it a focused replacement choice for performance-minded maintenance and repair.

This part cross-references Dayco XTX2251 for the same application. Search terms such as Gates 21R4140 CVT belt, G-Force RedLine belt, and high-performance UTV CVT belt are commonly used by shoppers comparing replacement options for side-by-side and off-road drivetrains.

What This Belt Helps Address

• Slipping or inconsistent CVT belt engagement
• Reduced acceleration caused by worn belt material
• Heat-related belt wear in off-road driving
• Loss of speed ratio efficiency under load
• Noise or vibration associated with belt deterioration

Installation Notes and Tips

Verify belt dimensions, section designation, and CVT system requirements before installation. Confirm the 31 mm top width, 15.9 mm thickness, and 1083 mm outside circumference match the original specification for the vehicle. Inspect pulleys, clutch faces, and belt alignment during service so the new belt can seat correctly and operate within the intended range.

For fitment-focused searches, use the exact part number 21R4140 along with the vehicle make and model. This helps narrow results for Gates CVT belt replacement needs on compatible UTV and side-by-side applications.

Quality Assurance

Gates manufactures this belt as part of its G-Force RedLine performance CVT lineup, using aramid cord reinforcement and OE-improved construction details to support consistent service in demanding environments. No warranty information was provided in the product data.