29-Inch Aluminium Alloy Mountain Bike Frame with Disc Brake Mount and Internal Routing

Building your own trail-ready mountain bike starts with the right frame. This 29-inch aluminium alloy frame provides a solid, lightweight foundation designed for off-road use. It comes ready for modern components, featuring a mount for disc brakes and internal cable routing to keep your build looking sleek. Available in a subdued black green finish, the frame offers two riser size options to help dial in your riding position. This detailed guide covers its construction, key dimensions, and practical considerations for your next build project.

Features and Construction

This frame is built with specific features aimed at modern mountain biking. The core material and design choices focus on providing a reliable platform for a custom build.

Material and Build

The frame is constructed from aluminium alloy. This material is widely used in bicycle frames for its favourable strength-to-weight ratio, offering a stiff and responsive feel that can enhance power transfer from the pedals. The welding and tube shaping are executed to create a unified structure. A key feature is the internal cable routing, often referred to as 'innerline'. This system guides brake and gear cables through the inside of the frame's downtube, protecting them from dirt, moisture, and potential snags, which also contributes to the bike's clean, uncluttered appearance.

Size and Practical Fit

The frame is designed specifically for 29-inch wheels, which are known for their ability to roll over obstacles more easily than smaller wheel sizes, contributing to momentum and stability on trails. Critical frame dimensions are provided to help assess fit and component compatibility. The head tube measures 44-55mm in diameter and is 110mm long, dictating the stack height for your headset and fork. The beam (likely the top tube) has a length of 590mm, influencing the bike's reach. The seat tube junction, described as the 'Five-Way', is 34mm in diameter and 68mm long, which will accommodate a standard seat post.

Uses and Placement

This frame is suited for riders looking to assemble a mountain bike tailored to their preferences. Its design supports both recreational trail riding and more committed off-road use.

Event or Professional Use

For riders participating in endurance events or regular trail riding, the 29-inch wheel platform combined with the aluminium frame offers a efficient and robust option. The internal routing helps safeguard crucial brake and shifting performance in muddy or wet conditions. The disc brake mount is essential for the consistent, powerful braking required in technical terrain, regardless of weather. The specific geometry, including a 385mm rear fork length and 135mm rear axle spacing, provides a stable and predictable ride character for handling varied trails.

Everyday Home Use

For the home mechanic or enthusiast, this frame presents a clear project for building a personal mountain bike. The two riser size options—410mm and 460mm lengths—allow for adjustment in handlebar height and cockpit setup to match riding style, from aggressive cross-country to more upright exploratory riding. The black green colour offers a neutral, low-maintenance finish that won't show trail dust as readily as lighter colours.

Benefits and Buying Value

Choosing a frame as the starting point for a bike build offers control over the final specification. This frame's design provides several practical advantages.

Reuse and Low Maintenance

Aluminium as a material does not rust, which simplifies long-term care; routine cleaning with a damp cloth is usually sufficient to maintain the frame's appearance. The internal routing not only looks clean but also reduces the need for frequent cable cleaning or replacement due to external exposure. As a standalone frame, it allows you to select new, high-quality components or reuse compatible parts from a previous bike, extending the life of serviceable gear.

Why Choose This Product

This frame stands out for its clear specification geared towards modern 29er mountain biking. The provided dimensions (head tube, beam, rear fork) offer concrete data for verifying component compatibility, which is crucial for a successful build. The inclusion of two riser sizes adds a layer of customisation often not found at this level. It provides a blank canvas for creating a bike that precisely matches your intended use, whether for local trails, bike-packing, or fitness riding, without the cost or compromise of a pre-built complete bicycle.