Belt-driven RC Timing Pair S3M 348mm - Arrowmax AM-910038  [AM-910038]

AM Medius S3M 348mm timing pair

The Arrowmax AM-910038 AM Medius belt comes as a matched pair of S3M profile timing belts, made for belt-driven scale RC models and hobby drivetrains. Each pack includes 2 x 348mm white rubber belts intended to mesh with standard S3M pulleys used in many model transmissions.

These belts are intended for timing and power transfer between pulleys: they keep pulley rotation synchronized, allow fine tension adjustments for setup tuning, and the white finish helps with visual alignment and inspection. Fit them where an S3M tooth profile and a 348mm loop circumference match your pulley spacing.

Fitting is straightforward on most RC belt systems: route the belt over matching S3M pulleys, set a sensible starting tension, then perform a short low-speed check to confirm tracking and load distribution before running at speed. Small tension changes alter drivetrain compliance and can affect handling feedback on belt-driven layouts, so aim for even tension and avoid rubbing against pulley edges.

As a spare or setup component, this two-piece Medius belt set offers an easy replacement option to keep S3M-based drivetrains running with consistent timing when a 348mm belt loop is required.