- Versatile Compatibility: This bicycle trainer axle features an adjustable length with spacers, fitting thru axle hubs of 135mm, 142mm, and 148mm. It accommodates bike frames up to 176mm wide, ensuring it works seamlessly with a variety of bike models. - Reliable Secure Mounting: Engineered with tapered heads on both ends, this skewer provides a snug fit in most bike trainer mounting holes. Enjoy a secure connection during your workouts, eliminating concerns about slippage. - Durable Construction: Made from high-quality 6061 aluminum alloy, this hub axle is designed to endure rigorous training sessions while maintaining its strength and integrity over time. - Enhanced Frame Protection: Our MTB Road Bike Thru Axle Spacers are specifically shaped to align with frame dropouts, offering extra protection to your bike frame during intense workouts and preventing potential damage. - Practical Use Cases: Ideal for indoor cycling enthusiasts looking to maintain their fitness routine during inclement weather. Perfect for competitive cyclists who need a reliable setup for training sessions at home. Excellent for mountain and road bikers seeking a robust solution for their bike trainer needs.