Cane Creek | Thudbuster G4 ST Suspension Seatpost

Short-travel suspension comfort for smoother everyday riding.

The Cane Creek Thudbuster G4 ST Suspension Seatpost is a short-travel suspension seatpost designed to reduce vibration and impact on rough roads, gravel paths, and uneven terrain.

Using Cane Creek’s proven parallel linkage system, the Thudbuster ST absorbs bumps while maintaining a consistent pedaling position. Elastomer springs provide controlled motion without the bounce or pedal-bob common with coil spring suspension posts. The result is a smoother ride that reduces fatigue and back discomfort, allowing riders to stay comfortable over longer distances.

Key Features

• Parallel Linkage Suspension Design
Cane Creek’s patented linkage system absorbs impacts while keeping the saddle angle and pedaling position consistent.

• Elastomer-Based Suspension
Dense elastomer springs absorb energy efficiently and provide smooth, self-damped movement without unwanted bounce.

• Adjustable Ride Feel
Includes three elastomers (Soft, Medium-Firm installed, and Firm) to tune suspension response to rider weight and riding style.

• Serviceable Pivot System
Threaded aluminum axles and PTFE bushings provide durability and allow the linkage pivots to be serviced over time.

Technical Specifications

• Discipline
Gravel / Commuter / Hybrid / E-Bike

• Component Type
Suspension Seatpost

• Suspension Travel
50 mm

• Post Diameter
31.6 mm

• Post Length
375 mm

• Setback
0 mm (unweighted)

• Post Material
Forged aluminum

• Clamp Design
Single-bolt saddle clamp with angle adjustment

• Pivot Hardware
Hard anodized aluminum axles with flanged PTFE bushings

• Weight
580 g (31.6 mm version)

• Max Rider Weight
150 kg / 330 lbs

• Color Options
Black (#000000)

Model Codes

• 31.6 × 375 mm
SP6A316

Compatible with standard bicycle saddle rails and frames designed for 31.6 mm seatposts.