Traxxas Progressive Rate Springs for Ultra-Shocks RC Shock Spring - 4957R

The Traxxas TRX4957R progressive rate springs are a set of four Ultra-Shocks-specific replacement springs designed for front and rear suspension use on compatible Traxxas models. Progressive rate springs are stiffer as the shock compresses further, giving the suspension a softer initial feel for small bumps while increasing resistance under heavier loads — a useful characteristic for mixed terrain driving where conditions change quickly. These springs are a direct Traxxas spare part, engineered specifically for Ultra-Shocks and are not interchangeable with standard Traxxas shock bodies.

Key Features

• Progressive rate spring design provides a variable spring rate — softer early in the stroke, firmer under full compression
• Compatible with Traxxas Ultra-Shocks only — not a universal fitment across all Traxxas shock types
• Sold as a set of four, covering both front and rear shock positions in one purchase
• Direct OEM Traxxas replacement part, ensuring correct fitment and spring rate for Ultra-Shock equipped models
• Part number TRX4957R makes it straightforward to confirm you are ordering the correct spring set

What's Included

• 4 x Traxxas progressive rate springs (front and rear, for Ultra-Shocks only)

What You Need

• Traxxas Ultra-Shock assemblies already fitted to your model (springs are not compatible with standard Traxxas shocks)
• Basic hobby tools for shock disassembly and spring replacement