42391 TRF421X Compatible 13.0mm Steering Post - Tamiya 9803477  [9803477]

Product Summary: 13.0mm Steering Post

This Tamiya 9803477 13.0mm steering post is a dedicated replacement for the 42391 TRF421X reference. It serves as the main pivot between the steering assembly and front uprights, helping to maintain steering centre and predictable response through setup changes.

Consistent steering feel relies on sound material choice and machining; this item is supplied as a single machined aluminium alloy shaft intended to replace worn originals and to support tuning where minimal play is important. Check the 42391 TRF421X part code for fit confirmation prior to installation.

Fitting notes: remove the front assembly according to your chassis handbook, inspect bearings and hexes for wear, slide in the post and secure using the existing hardware. Avoid forcing components; ensuring correct alignment prevents binding under steering loads.

Tuning role: replacing a worn steering post with a correctly sized, accurately machined unit reduces slop, sharpens steering response and aids in achieving repeatable lap-to-lap performance during setup trials.

Ideal for maintenance replacement or as part of gradual chassis tuning when precise steering input is required on 1/10 scale touring car setups.