- Adjustable length with spacers for compatibility with 135, 142, and 148 mm 12 mm thru axle hubs, providing a snug fit for a range of bike models. - Reliable connection with tapered heads on both ends, ensuring secure fit in most bike trainer mounting holes and reducing slippage during intensive workouts. - Robust 6061 aluminum alloy construction to withstand rigorous use while maintaining structural integrity through training sessions. - Frame protection enhanced by spacers shaped to match the contour of frame dropouts, offering additional protection against potential damage during training. - Use scenario 1: Set up an indoor trainer for road or mountain bikes with 135/142/148 mm thru axles to achieve stable, precise alignment during steady-state rides. - Use scenario 2: Rotate between bikes with different hub spacings on the same trainer without needing multiple adapters. - Use scenario 3: High-intensity interval training where secure mounting and dropout protection help prevent slippage and frame damage during hard efforts.