Serpent 803173 - 21T Anodized Aluminium Pulley Shim for Vintage 720-09  [SER803173]

Serpent SER803173 Pulley Shim 21T Aluminium Coated
Price:
CAD$28.39
Brand:
Serpent
Model:
SER803173
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Slim anodized pulley shim built for durability

The Serpent 803173 - 21T pulley shim is machined from anodized aluminium to keep weight low while adding toughness to your Vintage Series 720-09 drivetrain. The anodized finish improves surface hardness and resists abrasion so the shim handles frequent running without adding bulk.

Cleaner operation and lower belt wear

This pulley shim helps reduce debris trapping around gear teeth, limiting sand, grass, and grit from lodging in the belt path. Less debris means fewer belt failures and longer service intervals, making routine maintenance simpler for club races or backyard sessions.

Will this fit other Serpent pulleys besides the 720-09 setup?

The shim is made for the Vintage Series 720-09 configuration. It may fit other Serpent pulley assemblies but you should verify dimensions before installing.

Any tips for installing the Serpent 803173 - 21T shim?

Clean the pulley and belt area first, then slide the shim into place ensuring flush seating. Check belt tracking and tension after installation and run at low speed to confirm alignment.

How often should I inspect the shim and belts?

Inspect after heavy runs or every few sessions. Look for scalloping on belt teeth and any wear on the shim surface; clean debris away to keep belts moving smoothly.

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