Blogs

The Brompton 13T Rear Sprocket 3mm (For 3-Speed and SRAM 6-Speed) is a replacement sprocket designed for specific Brompton rear hub systems. It is compatible with Brompton 3-speed BSR wheels and 3/6-speed SRAM/Sachs rear wheels. The 13-tooth sprocket is part of the rear drivetrain and works with the chain to transfer pedalling power to the rear wheel.

The Brompton Advance Suspension Block And Fittings is designed for Brompton folding bikes equipped with the Advance rear frame. Positioned between the main frame and rear frame, the suspension block helps smooth out bumps and uneven surfaces while reducing excessive bounce and harsh impacts during riding. Lightweight and effective, it is designed to provide a smoother and more comfortable ride, particularly when riding over rougher roads and uneven terrain.

The Brompton Right Brake Lever with Integrated Underbar 3-Speed Shifter combines braking and three-speed gear control in a single handlebar assembly. Designed for Brompton folding bicycles with a 3-speed drivetrain, the integrated shifter provides a compact way to control the internal hub gearing while keeping the handlebar controls together.

The Brompton Advance 4-Speed Sprocket Set is a replacement component for Brompton bicycles equipped with the Advance (Mk6) 4-speed drivetrain. Designed for compatibility with selected C Line, P Line, T Line and electric Brompton models, the set is intended for maintaining and replacing the rear sprocket assembly of compatible bicycles.

The Brompton Borough Roll Top Bag (Large) is the largest bag in the Borough range, offering 28 litres of storage for serious commuting, everyday carrying and multi-day cycling trips. Designed with a classic roll-top opening and multiple storage compartments, the bag provides plenty of space while keeping your belongings organised and easy to access.

The Borough Waterproof Roll Top Bag Small is a compact, all-weather front bag designed to carry your everyday essentials while keeping them protected from wet weather. With 9 litres of packing space, there is plenty of room for a rolled-up jacket, a book, snacks and other daily essentials. A watertight front pocket provides additional storage for smaller items such as cards and keys.

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.