WTB Raddler Gravel Bike Tire (700 x 40) Tubeless Folding –

Product Overview

The WTB Raddler Gravel Bike Tire (700 x 40) Tubeless Folding is purpose-built for riders who refuse to compromise between speed and control on mixed terrain. Whether you’re carving through loose gravel, navigating tight cyclocross corners, or cruising wide fire roads, this tire delivers a confident, efficient ride. Engineered with a semi-slick center tread and aggressive outer knobs, the Raddler balances low rolling resistance with exceptional cornering grip—making it ideal for everything from long-distance bikepacking to fast-paced gravel racing.

At the heart of the Raddler’s performance is its SG2 puncture protection system. This dual-layer defense mechanism significantly reduces the risk of flats caused by sharp debris like glass, thorns, or metal shards. That means more time riding and less time fixing, whether you’re deep in remote trails or commuting across urban gravel paths. The high-volume casing further enhances comfort by absorbing vibrations from rough surfaces, while still maintaining responsive handling and lightweight agility. With tubeless compatibility, you can run lower pressures if desired—increasing traction and cushioning without sacrificing efficiency.

Key Features

• Semi-Slick Center Tread: Minimizes rolling resistance for faster speeds on smooth or packed sections of gravel and pavement.
• Aggressive Outer Knobs: Provide reliable grip and stability during hard cornering on loose, technical, or uneven terrain.
• SG2 Puncture Protection: A two-layer barrier that defends against cuts and punctures from common trail hazards, giving you peace of mind on long rides.
• High-Volume Casing: Offers improved comfort and traction without adding weight, helping you maintain momentum over varied surfaces.
• Tubeless Ready Design: Enables customizable pressure settings for optimized grip, reduced rolling resistance, and easier flat prevention.
• Sidewall Customization: Choose between sleek black for a modern look or tan for retro style and a marginally lighter build.

Technical Specifications

• Tire Type: Tubeless Ready, Folding Bead
• Size: 700 x 40C
• Tread Pattern: Semi-slick center with aggressive shoulder knobs
• Puncture Protection: SG2 (Dual-layer)
• Sidewall Options: Black or Tan
• Intended Use: Gravel, cyclocross, fire roads, bikepacking, endurance riding

Benefits & Use Cases

The WTB Raddler excels wherever versatility meets performance. Its tread design strikes a rare balance: the smooth center allows for efficient pedaling on open stretches, while the pronounced outer knobs bite into loose soil, sand, or wet roots when cornering. This makes it equally suited for fast group rides on groomed gravel paths and solo adventures on rugged backcountry routes.

For bikepackers and endurance riders, the Raddler’s combination of comfort, durability, and puncture resistance is especially valuable. The high-volume casing soaks up chatter from rough pavement and washboard surfaces, reducing fatigue on long days in the saddle. Meanwhile, the lightweight construction ensures quick acceleration and nimble handling, so you don’t feel weighed down during climbs or technical descents.

On cyclocross courses, the tire’s responsiveness and cornering confidence help you navigate tight turns and off-camber sections with precision. And thanks to its tubeless-ready design, you can fine-tune your setup based on conditions—running higher pressures for speed on hardpack or dropping them slightly for extra grip on muddy or rocky ground.

Whether you’re building out a dedicated gravel rig or upgrading an existing setup, the Raddler offers a dependable upgrade that supports both performance and reliability. Its availability in two sidewall colors lets you tailor not just function but also aesthetics—black for a clean, contemporary look or tan for that classic vintage vibe.

Important Notes

This tire comes in both black and tan sidewall options. While both versions share the same core performance characteristics, the tan sidewall variant is noted to be slightly lighter, which may appeal to riders prioritizing minimal weight—though exact differences are not specified. Always follow proper tubeless installation procedures, including using fresh sealant and checking bead seating, to ensure optimal performance and prevent air leaks.

As with any high-performance tire, regular inspection for wear, cuts, or embedded debris helps maintain safety and longevity. Proper storage away from UV light and extreme temperatures will also preserve rubber integrity over time.