WTB Riddler

The Riddler is a hybrid performer. Its fast-rolling center tread makes it surprisingly efficient on pavement, but it truly shines on gravel and mixed-surface terrain where those aggressive side knobs can dig in during cornering.

While the Riddler is engineered as a tubeless-ready clincher, it is fully compatible with standard inner tubes. However, running them tubeless is highly recommended to take full advantage of the lower tire pressures and puncture protection benefits.

The 37mm width is a classic gravel size that balances speed with a decent air volume. While it handles light gravel and hardpack dirt exceptionally well, it may feel less forgiving than wider tires if you frequently ride on very chunky or technical rock gardens.

This model features integrated protection layers in both the tread and the sidewalls. This dual-layer approach is designed to resist cuts and flats from sharp trail debris, making it a durable choice for long-distance mixed-terrain rides.

Yes, the 120 TPI (threads per inch) casing is more supple than lower-count options. This flexibility allows the tire to conform better to the ground, resulting in a smoother ride quality and improved traction over uneven surfaces.