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Warning against drilling or modifying the frame/fork, which voids warranty and risks failure, injury, or death.
Explains the two-part stem and elastomer insert allowing up to 2° vertical displacement for vibration damping.
Notes the antishock elastomer insert is a wearable part but does not compromise safety with extended use.
Instructions for placing the stem on the 1 1/8" fork steerer and removing the shipping sleeve, referencing fork manufacturer guidelines.
Specifies torque for lower (8Nm) and upper (6-10Nm) clamp bolts, noting upper bolt torque adjusts vibration damping.
Details the 2-year warranty against defects, limitations, proof of purchase, and exclusions like wear and improper use.
The TranzX Antishock Stem is a bicycle component designed to enhance riding comfort by providing vibration damping through a unique two-part stem structure. This innovative design incorporates a specially engineered elastomer insert that allows for vertical displacement, effectively absorbing shocks and vibrations encountered during cycling. The stem's primary function is to reduce the impact of road imperfections and trail chatter on the rider's hands and arms, thereby improving comfort and potentially reducing fatigue on longer rides.
The core of the Antishock Stem's functionality lies in its ability to provide up to 2 degrees of vertical displacement about a central pivot pin. This movement is facilitated by the elastomer insert, which acts as a shock absorber within the stem's structure. When the bicycle encounters bumps or uneven terrain, the stem's two parts, the stem base and the stem extension, can move relative to each other. The elastomer insert compresses and rebounds, dissipating the energy from the vibrations before they reach the handlebars and, consequently, the rider. This mechanical damping system is a passive yet effective way to smooth out the ride without adding complex hydraulic or pneumatic components. The design ensures that the damping effect is consistent and reliable, contributing to a more comfortable and controlled riding experience across various terrains. The stem is designed to be installed on a standard 1 1/8-inch fork steerer, making it compatible with a wide range of modern bicycles. The installation process involves securing the stem to the fork steerer and then attaching the handlebars to the faceplate, with specific torque settings for the bolts to ensure both safety and optimal performance.
The TranzX Antishock Stem is designed for straightforward integration into a bicycle's existing setup. Its installation process is similar to that of a conventional bicycle stem, with a few key considerations for optimal performance. Before installation, a plastic shipping and storage sleeve protects the stem's internal components; this sleeve should be removed as the stem slides onto the fork steerer. The stem is secured to the fork steerer using a lower stem clamp bolt, which requires a specific torque of 8Nm to ensure a secure fit without over-tightening. This precise torque setting is crucial for the stem's stability and the rider's safety.
Once the stem is securely mounted on the fork steerer, the handlebars are attached to the stem extension via a faceplate, which is held in place by four M5 bolts. An important feature for customization and performance tuning is the upper stem clamp bolt. This bolt's torque can be adjusted within a range of 6-10Nm. This variable torque setting allows riders to fine-tune the level of vibration damping according to their personal preference and riding conditions. A lower torque setting within this range might allow for more vertical displacement and thus more damping, while a higher torque might stiffen the stem slightly, offering a more direct feel. This adjustability empowers riders to optimize their comfort and control.
The stem's design also emphasizes safety and durability. It is crucial for users to follow all instructions and precautions provided by the fork manufacturer regarding the use of a star nut or compression plug, as these components are vital for the overall integrity of the bicycle's front end. The stem's two-part construction and the elastomer insert work in conjunction to provide the antishock function, making it a complete system for vibration reduction. The visual design of the stem is sleek and integrated, ensuring it complements the aesthetic of most modern bicycles. The pivot pin, M6 bolt, stem base, stem extension, and faceplate are all clearly identified components that contribute to the stem's overall structure and function.
The TranzX Antishock Stem is designed with durability and minimal maintenance in mind, focusing on reliable performance over its lifespan. A key aspect of its maintenance profile relates to the elastomer insert, which is the heart of its antishock mechanism. The manual explicitly states that "The Antishock elastomer insert is a wearable part, but will not affect safety with extended use." This is an important piece of information for users, indicating that while the elastomer may experience wear over time due to repeated compression and rebound cycles, its degradation will not compromise the structural integrity or safety of the stem itself. This means riders can continue to use the stem confidently, even if the damping properties of the elastomer might subtly change over very long periods of use. This design choice simplifies maintenance, as there is no need for routine replacement of the elastomer insert for safety reasons.
Beyond the elastomer, general maintenance for the Antishock Stem aligns with standard bicycle component care. This includes periodically checking the torque settings of all bolts—the lower stem clamp bolt (8Nm), the upper stem clamp bolt (6-10Nm), and the four M5 bolts securing the faceplate. Ensuring these bolts are tightened to their specified torques is crucial for both safety and optimal performance. Loose bolts can lead to instability, poor handling, and potential safety hazards, while over-tightening can damage the components. Regular inspection for any signs of wear or damage to the stem body, faceplate, or bolts is also recommended. Cleaning the stem with appropriate bicycle cleaning products and avoiding harsh chemicals will help preserve its finish and material integrity.
The warranty information provided also sheds light on maintenance considerations. The stem is warranted for two years against defects in workmanship, highlighting the manufacturer's confidence in its initial quality. However, the warranty does not cover "normal wear and tear, routine maintenance, improper installation or improper use of the stem." This underscores the importance of correct installation and adherence to the recommended torque specifications, as well as general responsible use. Any modification of the stem is explicitly stated to void the warranty, emphasizing that the stem is designed to function as a complete, unmodified unit. This also implies that users should not attempt to disassemble or alter the internal components, including the elastomer insert, as this could compromise its performance and safety. In essence, the maintenance philosophy for the TranzX Antishock Stem is largely preventative, focusing on correct installation, appropriate torque management, and regular visual inspections, with the understanding that the core damping component is designed for extended wear without safety implications.
General| Material | Aluminum |
|---|---|
| Clamp Diameter | 31.8 mm |
| Steerer Diameter | 1 1/8 inch |
| Travel | 30 mm |
| Color | Black |
| Type | Suspension |
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