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Like with all our Toro Genuine Parts, Toro belts are designed and manufactured to fit a specific application on a wide range of Toro mowers. Goodyear Tire and Rubber Company, our belt partner, continually works side-by-side with us to make sure each belt is specifically designed for the drive and will perform as promised. Toro belts are extensively lab and field tested before they are ever specified for a Toro product to assure our customers of maximum performance.

Belts may be identical in size but not in construction. If the wrong belt is used, the belt may not only fail, but the belt failure may cause other components to be severely damaged as well.

The ins and outs of belts:

Tensile Cords

Polyester (Vytacord)- Applications: Misaligned pulleys, shock loading, limited take up, moderate twisting.

Fiberglass - Applications: Less severe drives, medium-duty clutching, added stability, High temperatures.

Kevlar (Flexten)- Applications: Severe loads where stretch and shrinkage must be kept to a Minimum.

Cushion - Provides the necessary support for the cords. It also prevents distortion and collapsing.

Fiber loading - Provides unidirectional support which helps resist abrasion, reduce noise and controls the co-efficient of friction.

Cogs -  Provides increased flexibility for specific types of belts and applications.

Top Fabric - Increases flexibility, provides wear resistance from backside idlers and joins individual belts.

Cut Edge

Cogged - most common loads, better flexibility.(Click here for image)

Laminated - simulated dry envelope for improved clutchability. (Click here for image)

Envelope - Provides a long-wearing driving surface and the proper co-efficient of friction. (Click here for image)

High Friction Envelope for common standard loads.

Dry Envelope - used for shock loading, misalignment and clutching drives.

Toro belts are typically designed to last 1,500 hours or two seasons. Toro engineers factor in allowances for stretching and wear over the expected life of a belt to assure the machine will run at top performance.


Belts break for one of two reasons:

  • Wear
  • Running into fixed objects such as stakes, rocks, stumps, etc.

Wear - What causes belts to wear out?

Dished-out pulleys - As a mower accumulates hours, the pulleys will start to dish out (get wider). Once this starts to occur belts are subject to premature failures. Debris migrates to the pulley and accumulates in the groove which causes excess friction that accelerates belt wear.
Improper tension - It's important to make sure there is always proper tension. In fact, Toro provides instructions on the cutting deck that show how to properly tension the belt (Typically, the recommended deflection at the midpoint between two pulleys).

A belt is like a fuse - it's designed to be the weak link. Belts are designed to break to prevent other costly components in the cutting system from breaking. It's far more economical to replace a belt than many other components.