BROTHER CYCLES ALLDAY | A single-speed frame for enjoying city riding, gravel, and touring alike

Not for racing, but for freely exploring any road that catches your eye.

The BROTHER CYCLES ALLDAY is a single-speed frame that combines the beautiful silhouette of a track bike with the freedom of gravel riding and touring.

The classic appearance features a horizontal 4130 chromoly frame paired with a lugged flat crown fork. It naturally adapts to everything from light city cruising to adventurous rides on unpaved roads.

It offers tire clearance for up to 700x35C tires, and features removable cantilever brake mounts. Additionally, it has eyelets for front and rear racks and fenders, allowing you to customize it freely to suit your lifestyle and riding style.

Rather than solely pursuing competitiveness or speed, this is a bike that inspires you to think, "Where shall I go today?" As its name "ALLDAY" suggests, it's a frame with the appeal to make you want to ride all day long.

Features

• Wide tire clearance accommodating up to 700x35C
• Design that blends the appeal of track bikes and gravel bikes
• Removable cantilever brake mounts
• Compatible with cantilever, V-brakes, and medium-drop calipers
• Standard front and rear rack and fender mounts
• Bottle cage mounts, ideal for touring
• Double-butted 4130 chromoly frame
• High rust prevention performance with ED coating
• 120mm rear spacing + dropout adjusters
• Versatile for city riding, gravel, and touring

SPEC

• Brand: BROTHER CYCLES
• Model: ALLDAY
• Frame Material: 4130 Chromoly Steel (double-butted / ED coating)
• Fork: Lugged flat crown fork (removable cantilever mounts)
• Brake compatibility: Cantilever brakes / V-brakes / Medium-drop calipers
• Max tire clearance: 700c × 35mm
• Rear spacing: 120mm
• Seatpost diameter: 27.2mm
• Headset standard: 1-1/8 inch Ahead
• BB standard: 68mm ISO thread
• Frame weight: 2.0kg (54cm)
• Fork weight: 1.0kg (uncut)
• Safety standard: ISO 4210 compliant

Among single-speed frames, this model offers a particularly wide range of "play styles."

While it definitely has a cyclocross-track vibe, its charm lies in not being overly competitive and naturally blending into touring and daily use. With 35C tire clearance, you can easily enjoy not only paved roads but also riverside paths and forest trails.

Add a rack and fenders, and it excels as a commuter or touring bike; assemble it as a simple single-speed, and it has an outstanding presence in the city. This frame is recommended for those who want to carefully build a bike that truly reflects themselves.