29-inch Aluminium Alloy Mountain Bike Frame with Disc Brake Compatibility

This 29-inch aluminium alloy mountain bike frame serves as the core structural element for building a modern off-road bicycle. It is designed to accommodate the larger 29-inch wheel size, a popular choice for mountain biking due to its improved rollover capability over obstacles. The frame’s construction from aluminium alloy offers a balance of durability and manageable weight, making it a practical choice for trail and cross-country riding. Key features include a mounting point for disc brakes, which provide consistent stopping power in various conditions, and an internal cable routing system. This frame is offered in a black green finish and comes in two distinct sizes, allowing riders to select a fit based on the provided riser measurements.

Frame Specifications and Geometry

The provided dimensions outline the specific geometry of this mountain bike frame, which influences handling, comfort, and fit. These measurements are essential for ensuring compatibility with other bicycle components and for determining the overall ride feel once the bike is fully assembled.

Key Stated Dimensions

The frame's beam length is specified as 590mm, which contributes to the distance between the front and rear of the bike and affects stability. The rear fork length is 385mm, a measurement relevant to rear wheel placement and chainstay length. The head tube dimensions are given as 44-55 * 110mm, which dictates the size of the headset and fork steerer tube required. The 'Five-Way' measurement, noted as 34 * 68mm, typically refers to the seat tube cluster dimensions where the seat stays and chain stays meet the seat tube. The 'Open gear' measurement of 135mm indicates the spacing for the rear wheel hub, a standard dimension for many mountain bike frames.

Size and Fit Options

This frame is available in two size variations, differentiated by the riser size: 30.8mm in diameter by either 410mm or 460mm in length. The riser likely refers to the seat post dimensions. These two options allow for some adjustment in frame effective seat tube length, enabling a better fit for riders of different heights. The specific choice between the 410mm and 460mm option should be made based on a rider's individual measurements and preferred riding position.

Construction and Features

The frame's design incorporates several modern mountain bike features aimed at performance and aesthetics. Its construction and included hardware focus on providing a solid platform for a custom build or a replacement frame.

Material and Build Quality

The frame is fabricated from aluminium alloy, a material favoured in bicycle manufacturing for its good strength, relatively light weight, and resistance to rust. This makes the frame suitable for the demands of mountain biking, where it must withstand impacts and variable loads. The use of aluminium contributes to a responsive ride quality and provides a cost-effective foundation for a performance-oriented bike.

Disc Brake and Internal Routing

A key feature is its compatibility with disc brake systems, as indicated by the inclusion of a dedicated brake bracket in the package. Disc brakes offer superior modulation and consistent performance in wet or muddy conditions compared to some rim brakes. Furthermore, the frame utilises an internal cable routing system, often referred to as 'innerline' routing. This design channels brake and gear cables through the inside of the frame, protecting them from external damage and giving the bicycle a cleaner, more aerodynamic profile with fewer external clutter.

Assembly and Practical Application

This product is a frame only, meaning it requires the rider to source and install all other components like wheels, drivetrain, brakes, handlebars, and saddle. This offers flexibility for a custom build but necessitates technical knowledge or professional assistance.

For the Custom Bike Builder

This frame is an ideal starting point for cyclists wishing to build a mountain bike tailored to their specific component preferences and riding style. The internal routing requires careful installation of cables and housings, and all listed frame dimensions must be cross-referenced when purchasing compatible parts such as the fork, seat post, wheelset, and crankset. The included brake bracket is a necessary item for mounting the rear disc brake caliper.

As a Replacement Frame

For mechanics or individuals looking to replace a damaged frame on an existing 29-inch mountain bike, this frame presents a potential option. Critical checks for compatibility include matching the rear hub spacing (135mm Open Gear), headset standard (44-55 * 110mm head tube), and seat post diameter (30.8mm). Ensuring the geometry is suitable for the donor bike's intended use is also vital.