29-inch aluminium mountain bike frame with disc brake mounts and internal routing

This 29-inch aluminium alloy mountain bike frame serves as the central structure for building a capable off-road bicycle. Designed around modern mountain bike standards, it features mounting points for disc brakes and utilises internal cable routing to keep gear and brake cables protected from the elements and external damage. The black green colour provides a subdued, trail-ready finish, while the frame’s geometry is built to accommodate 29-inch wheels, offering improved rollover capability on rough terrain. With specific dimensions including a 590mm top tube and 385mm rear chainstay, it creates a platform suitable for aggressive trail riding or general mountain use.

Features and Construction

Built from aluminium alloy, this frame provides a balance of strength and weight for mountain biking applications. Its construction includes specific interfaces and measurements designed to work with standard bicycle components.

Material and Build

The frame is constructed from aluminium alloy, a material commonly used in bicycle frames for its favourable strength-to-weight ratio and durability in off-road conditions. The frame features internal cable routing, where gear and brake cables pass through internal channels within the frame tubes rather than being mounted externally. This design helps protect cables from dirt, moisture, and impact, and contributes to a cleaner overall appearance. The frame includes disc brake mounts, which are compatible with standard post-mount or flat-mount disc brake calipers, allowing for the use of modern hydraulic or mechanical disc braking systems.

Size and Practical Fit

The frame is designed for 29-inch wheels, a common size for modern mountain bikes that provides improved traction and rollover over obstacles. The head tube measures 44-55 * 110mm, indicating a tapered design that accommodates a 1 1/8" to 1.5" tapered steerer tube fork. The seatpost diameter is 30.8mm, available in two length options: 410mm and 460mm. The top tube length is 590mm, and the rear chainstay measures 385mm, contributing to the bike’s overall wheelbase and handling characteristics. The bottom bracket shell is 34 * 68mm, compatible with standard threaded bottom brackets.

Uses and Placement

This frame is intended as the foundation for building a complete mountain bike, suitable for various off-road cycling activities.

Event or Professional Use

For riders building a bike for trail riding, cross-country, or general mountain biking, this frame provides a standard platform compatible with widely available components. Its 135mm rear dropout spacing is compatible with many quick-release rear hubs and some through-axle systems with appropriate adapters. The internal routing is beneficial for riders who frequently encounter mud, dust, or wet conditions, as it offers additional cable protection. The disc brake mounts allow for the installation of powerful braking systems necessary for technical descents and variable trail conditions.

Everyday Home Use

For the home mechanic or enthusiast building a personal bike, this frame offers a straightforward starting point. The aluminium construction does not require the same specific care as carbon fibre regarding torque settings and impact. The black green colour provides a neutral finish that pairs with various component colours. Having two seatpost length options (410mm and 460mm) allows for some adjustment to suit different rider heights or preferred saddle positions, though final fit will depend on the complete build including stem length, handlebar width, and fork choice.

Benefits and Buying Value

This frame offers value as a core component for a custom bike build, focusing on standard specifications and practical features.

Reuse and Low Maintenance

Aluminium frames are generally resistant to corrosion and do not require specific protective coatings beyond standard paint. The internal routing channels may require more effort during initial cable installation but can help reduce ongoing maintenance by keeping cables cleaner. Standard interfaces like the 34 * 68mm bottom bracket and 135mm rear spacing ensure compatibility with a wide range of new and existing components, potentially allowing for future upgrades or part swaps without needing a new frame.

Why Choose This Product

This frame is chosen for its adherence to common mountain bike standards—29-inch wheels, disc brake mounts, internal routing—which simplifies the component selection and building process. The provision of two seatpost sizes (410mm and 460mm) offers flexibility for different builds. It serves as a blank canvas for riders who wish to select their own components (fork, wheelset, drivetrain, brakes) to create a bike tailored to their specific preferences, rather than buying a complete, pre-configured bicycle.