Boston Custom

Boston Single Speed Folding Bike Frame

Single Speed or Fixed Gear

The Boston Custom frameset is built with horizontal track drop outs, so it’s ready to become a single speed or fixed gear build, as unique as you are. Chromoly fork included.

The Essentials

• Supports single speed or fixed gear
• Wheel Size: 700c
• Folding Time: 20 sec.
• Folded Size: 36″x28″x12″ (complete)
• Approx Weight: 5.2 pounds (2350g)
• M.S.R.P: $499.99


Great For

• Custom fixed gear builds.
• City riding.
• Lightweight maneuverability.
• Simple maintenance.

Bike Sizing

• 19in Frame: For riders 5’3″ – 5’10”.
Standover height is 28″
• 21in Frame: For riders 5’11” – 6’4″.
Standover height is 29″


The Montague Boston Custom is a full-size, folding frameset with track dropouts. This frame takes 700c-wheels for ideal riding in the city. It can support a flip-flop hub so the rear wheel can operate as either a fixed-gear or free-wheel setup. The Boston is a fast bike for the urban rider who wants simplicity with excellent performance. The Clix quick release and the patented folding system convert the folding bike from full-size to trunk-size in less than 20 seconds.

Boston Custom Folding Bike Frame
Boston Folding Bike Frame CLIX QR

CLIX Folding System

Clever integration of the patented CLIX System allows the BOSTON to be folded in under 20 seconds without the use of tools. A flip of the CLIX quick release lever on the top tube and the bike folds to a compact size.

Folding Integrated Technology

The BOSTON frame is designed around a patented folding system. The Folding Integrated Technology (F.I.T.) is based around frame construction concepts designed for serious full suspension downhill bikes. Not only does this make folding easier but it makes this bike the strongest folding bike on the market.

Learn More
Boston Frame Folding System Closeup
Boston Dropouts Fixed Gear Closeup

Singlespeed or Fixed Gear

The BOSTON Custom frame is built with simplicity in mind. Feel one with your bike with just one gear. The setup provides a low weight, low maintenance drivetrain perfect for city riding.


Color Matte black front and rear frame.
Material Custom drawn 7005 Series Aluminum tubing with FIT System.
Sizes 19”, 21”
Bottom Bracket 68mm English Threaded
Seat Post Diameter 30.0mm
Head Tube Diameter 1-1/8″
Fork Cromoly straight blade for caliper rim brake. 1-1/8″ steerer tube.
Rear Frame O.L.D. Spacing 120mm. Horizontal dropouts.


Find a local dealer or distributor to purchase your new Montague folding bike.

How to Buy

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