42391 TRF421X 13.0mm Steering Post for Tamiya 9803477  [9803477]

13.0mm Steering Post - Key Details

This Tamiya 9803477 13.0mm steering post is a precision replacement made to fit the 42391 TRF421X reference. It serves as the pivot between the steering assembly and the front uprights, helping keep steering centered and responsive when you make setup changes.

Material quality and accurate machining matter for repeatable steering feel; this component is supplied as a single machined aluminium alloy shaft to replace worn or damaged originals and to support fine tuning where minimal play is required. Always verify the part code 42391 TRF421X against your chassis parts list before fitting.

Installation notes: follow your chassis manual to remove the front assembly, inspect related bearings and hexes for wear, then slide the post into place and secure with the existing fasteners. Do not force parts; correct alignment of the post prevents binding and preserves predictable steering geometry.

Tuning role: installing a correctly sized, well-machined steering post reduces linkage slop, sharpens toe and Ackermann response, and helps deliver more consistent lap-to-lap steering feel during setup changes and track testing.

Use this item as a routine maintenance replacement or as part of stepwise chassis tuning when precise steering inputs are required on 1/10 scale touring car setups.