Blogs

The Brompton 12-Speed Chain Tensioner Nut and Washer is a replacement hardware set designed for Brompton bicycles equipped with the 12-speed drivetrain. The 12-speed system combines a 3-speed internal gear hub with a 4-speed external cassette, providing 12 gear combinations for a wider range of riding conditions. This product is identified as Q Part Q103581 and is specifically designed for the 12-speed drivetrain.

Built for Everyday Rides and Adventures in Any Weather When you need extra space without adding bulk to your Brompton, the Borough Waterproof Roll Top Rack Bag is a practical solution for carrying your essentials on the rear of the bike.

The Brompton Basket Bag Small (part of the Borough bag family, often referred to as the Borough Basket Small) is the compact, highly agile sibling to the massive 23L large basket. Easy access storage for everyday rides. Just like its larger counterpart, it attaches directly to the Front Carrier Block on your Brompton frame, meaning that carrying your daily essentials has zero effect on your steering or balance.

The Brompton Be Seen Light for G Line represents a significant engineering shift in Brompton’s integrated safety ecosystem. Designed specifically for the larger-wheeled, adventurous Brompton G Line (launched in late 2024/2025), this lighting kit moves away from universal rubber straps and clips. Instead, it features a bespoke, flush-mounted, and highly aerodynamic design engineered to stay permanently on the bike—even when fully folded.

The Brompton Borough Basket Large is arguably the most versatile, user-friendly, and popular luggage option in the Brompton ecosystem. Operating like a premium, heavy-duty shopping tote engineered specifically for a folding bike, its open-top design makes it the ultimate choice for grocery runs, daily commuting, and tossing in miscellaneous gear on the fly.

The Borough Waterproof Pouch for G Line represents a crucial evolutionary step in Brompton’s on-bike cockpit storage solutions. Launched alongside the larger-wheeled, adventure-focused Brompton G Line, this specialized pouch moves away from the traditional velcro strap attachments used on older 16-inch Brompton models. Instead, it features a semi-rigid, custom-molded mounting interface designed to lock natively onto the G Line's unique cockpit architecture.

The Brooks Cambium C17 Special (Natural) is an elevated, premium variation of the iconic C17 saddle. While it shares the same beloved 60° commuter-and-touring geometry as the standard model, the Special Natural edition leans heavily into organic heritage aesthetics. It swaps the synthetic all-weather nylon top for an untreated, premium organic cotton canvas and features a stunning, raw liquid-rubber coated organic base.

The Brooks Saddle Cambium C17 is a premium, all-weather saddle that has become one of the most popular upgrades for Brompton riders worldwide. Known for blending traditional Brooks comfort with cutting-edge, maintenance-free materials, the C17 is a vulcanized rubber saddle designed for an angled, commuting, and touring riding position (typically a 60° spine angle, which perfectly matches the Brompton "M" and "H" type handlebars).

A Brompton is more than just a bicycle—it is a precision-built companion for urban living. To preserve that experience indoors, a dedicated storage surface helps bridge the gap between riding and living space.

The Brompton Replacement Front Wheel Axle Fittings (Standard) is a replacement hardware kit designed for Brompton bicycles equipped with traditional steel forks and standard front wheel assemblies. Although compact in size, these components play an essential role in securing the front wheel and maintaining proper wheel alignment.

Brompton CatEye GVolt 60 is a premium front lighting system designed specifically for Brompton folding bicycles. Mounted at the fork crown rather than the handlebar, it remains unobstructed by front luggage and integrates neatly with Brompton’s unique folding design.

The Brompton Brake Caliper with SwissStop FlashPro BXP Pads is a popular upgrade for riders seeking improved braking performance, better modulation, and reliable wet-weather control. Featuring a dual-pivot caliper design and high-performance SwissStop brake pads, this setup delivers smooth and predictable braking while remaining easy to maintain through replaceable cartridge-style pad inserts.

The Antusi Q5 Smart Rear Light is a popular third-party integration for Brompton enthusiasts. While not manufactured directly by Brompton, it has become a staple "super-upgrade" because it fits perfectly into the Brompton aesthetic and solves common lighting issues on folding bikes.

The Brompton Advance Rear Mudguard Roller Wheel is a tiny but essential component specifically engineered for the P Line and T Line models. Unlike the standard mudguard wheels found on the C Line, this "Advance" version is designed to work with the superlight rear frame and the unique Advance Mudguard system. It ensures that when you fold your bike (without a rack), it remains stable and can be "trolled" smoothly.

The Brompton Advance Front Mudguard is a specialized component engineered specifically for the P Line and T Line series. It represents a significant upgrade over the standard "Classic" mudguards found on the C Line, prioritizing weight reduction, aerodynamics, and a cleaner aesthetic.

The Brompton Advance Complete Rear Rack Kit is a marvel of weight-optimized engineering. Specifically designed for the P Line and T Line, this rack is significantly lighter and more streamlined than the classic version found on the C Line. It transforms your "Superlight" Brompton into a more stable rolling machine without sacrificing its lightweight DNA.

The Advance 4-Speed Shifter with Integrated Brake Lever is a pinnacle of Brompton’s "Superlight" engineering. Originally developed for the P Line and later the T Line, this component was designed to be as light as possible while managing the precise shifting required for the external 4-speed drivetrain. Unlike the classic 2 or 3-speed shifters found on the C Line, this is a trigger-style shifter that offers a much more tactile, modern "click" feel.

The 20-inch Front Wheel for G Line represents the biggest structural shift in Brompton's history. Moving away from the traditional 16-inch (349mm) standard, this wheel is built to handle gravel, light trails, and the increased stresses of hydraulic disc braking.

The 16" Puncture Pouch, Multitool & Inner Tube is one of the most clever official accessories released by Brompton in 2025. It targets a specific problem: providing a complete puncture-repair solution that stays on the bike without occupying the front carrier block or the internal frame tube (where the classic Toolkit resides). Originally inspired by the "sandwich bag" seen on the limited-edition CHPT3 V4, this pouch is now a standard accessory for the 16-inch wheel lineup.

The 140mm Center Lock Brake Rotor is a milestone for Brompton, as it is a core component of the G Line—the first-ever Brompton series to feature hydraulic disc brakes. Unlike the rim brakes found on the C, P, and T Lines, this system provides consistent, powerful stopping performance even in wet or muddy off-road conditions.