Wabi Thunder Complete Build

Meet the Thunder, a TIG-welded Reynolds 725 steel track-style bike built for single-speed and fixed-gear riding, with the versatility to go far beyond smooth pavement. With room for wider tires and mounts for fenders and racks, it is ready for mixed terrain right out of the box. Coming in just over 20 pounds*, it is built to order with your choice of bars, saddle, and gearing.

What's New. These latest builds now feature our Wabi Pro headset, made for us by FSA  based on their premium Orbit-X design, as stock. In addition, we've adjusted the frame design to accommodate a wider range of cantilever, V-brake, and mini-V brake options.

Lightweight By Design. The Thunder’s heat-treated, double-butted Reynolds 725 chromoly frame is built to be light enough for fast city riding yet strong enough to handle mixed terrain. Oversized main tubes and slim stays keep the bike responsive and smooth, giving you a versatile ride that adapts easily to where you take it, all without adding unnecessary weight.

Ready For Any Route. Thunder’s geometry is built for longer days, rougher surfaces, and more varied terrain than a traditional track frame. It delivers stability when the pavement gets patchy, comfort on extended rides, and confident handling through fast corners, bike lanes, and light gravel paths.

Precision In Every Component. Each Thunder complete build includes proven, durable components from brands like Tektro, FSA, Tange, Andel, and Kenda. Every part is chosen for reliability and performance on mixed surfaces, keeping the bike smooth, predictable, and low-maintenance.

Purpose-Built Versatility. The Thunder’s fork and frame include mounts for fenders and racks, giving you the flexibility to set it up for commuting, adventure rides, or all-weather use. Removable cantilever brake posts let you choose from a range of brake styles to match your needs, whether you want more power, extra clearance, or a specific feel. With room for tires up to 44 mm, the Thunder adapts easily to the kind of riding you want to do.

Simplicity, Evolved. While the Thunder expands where you can ride, it still stays true to the Wabi philosophy. The clean lines, logo-free aesthetic, and thoughtful steel craftsmanship highlight the bike itself—no distractions, just a well-built machine ready to roll.

Built For You. Every Thunder is built to order from the frame up, with free choices for bar style, saddle, and gearing. Premium upgrades from Brooks, Sugino, SRAM, Phil Wood, Fizik, and more are also available at special discounted pricing.

BASE SPECS

• Frame: TIG-welded Reynolds 725 double-butted, heat-treated tubing.
• Fork: Brazed tapered chromoly steel with an investment cast crown, 1 1/8" steerer, and forged fork ends.
• Wheels: Lightweight 700c tubeless-ready wheels with black machined rims, silver sealed-bearing, flip-flop hubs, and silver 32h double-butted spokes.
• Crankset: Cold-forged alloy 170mm crank arms, 144BCD.
• Gearing: 46T chainring; 18T freewheel & 18T fixed cog. Freewheel/single speed is the default on the drive side.
• Chain: 1/2" x 3/32" single speed chain.
• Brakes: Forged aluminum cantilever brakes mounted to removable cantilever posts.
• Saddle: Synthetic leather in a choice of racing, sport, or comfort fit.
• Seatpost: 27.2mm alloy post with 24mm setback single-bolt design.
• Stem: 26mm clamp alloy stem with -17 degree rise for a classic horizontal-stem look. Length based on frame size HERE. 
• Headset: 1-1/8" threadless sealed-bearing design.
• Handlebars: Alloy bars in 5 styles with width based on frame size HERE. 
• Tires: 700C x 35mm Kenda all-terrain tires.
• Avg. Weight (55cm): ~20.5 pounds (depends on configuration)

Size Chart

We highly recommend review our sizing page before purchasing. We recommend looking at both your height and your actual inseam / standover height. The guide below can also provide some general guidelines.