This Arrowmax AM-910030 AM Medius Belt S3M 348MM Front + Rear (2) is a matched pair of S3M profile belts intended for RC-scale drivetrains, specified at 348mm length for both front and rear runs. The set is presented as a direct replacement option where S3M tooth engagement is required, and it is designed to be used in typical on-road and touring car belt-driven layouts.
Installation notes: route each belt over the designated pulleys following your chassis routing, avoid excessive twist, and set tension to the chassis manufacturer’s recommended slack to prevent skipping or premature wear. During tuning, belt tension and pulley alignment influence drivetrain smoothness and lash; use incremental changes and verify with short runs.
Tuning role: replacing worn belts with correctly sized S3M belts restores consistent tooth engagement and can reduce drivetrain backlash, contributing to repeatable throttle response and steering feel on carpet, asphalt, or smooth concrete surfaces common to 1/10 on-road setups.
For modelers maintaining belt-driven RC cars, this AM-910030 set provides two matched S3M 348mm belts to replace worn belts and retain consistent drivetrain engagement; verify pulley profile and path length before fitting.
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