CST Scout 20″ × 4″ eBike Tire — Fits Super73, Rad & Similar Fat-Tire eBikes

The CST Scout 20″ × 4″ is a high-traction eBike tire built for 20″ fat-tire platforms like Rad Power Bikes and Super73.
Designed to support higher system weight, this tire delivers predictable grip during acceleration, cornering, and braking — especially important for passenger-capable and cargo-style eBikes.

This is a stability-focused tire that prioritizes control, traction, and safe braking over rolling speed, making it well-suited for urban riding, mixed surfaces, and everyday eBike use.

Best Use

Rad Power 20″ fat-tire eBikes

Super73-style 20″ platforms

Passenger or cargo-rated eBikes

Riding where traction and braking control matter most

Why This Tire

Wide 4″ footprint increases stability under load

Aggressive tread pattern improves braking and cornering traction

Designed to handle eBike torque and weight

Helps maintain control when riding with two passengers

Weight: ~1674 g per tire (about 3.69 lbs)

Fits Super73 / Rad & Similar 20″ eBikes

Designed for 20″ × 4″ fat-tire eBike platforms, including:

Rad Power 20″ fat-tire models
 Super73 (S1, S2, RX, R-Series)
Ariel Rider X-Class (20″ versions)
Juiced Scorpion / HyperScorpion
Yadea models with 20″ × 4″ tire clearance
Other 20″ fat-tire eBikes with passenger or cargo capability

Rider Advice

Recommended for Rad Power and similar 20″ eBikes carrying additional weight, including a second passenger.
The wide casing and tread pattern improve grip during starts and stops, helping manage braking forces and maintain stable handling.

This is not a lightweight or fast-rolling tire — it’s built for traction, durability, and control on higher-mass eBike platforms.