Easy to Use Adjustment: To accommodate rear axles of various widths, this skewer provides precise adjustment and includes spacers of different thickness, ensuring a proper fit between your bike and trainer. Easy to Install: your existing thruaxle with this adapter to improve wear resistance and quickly start indoor training. Durability Assured: Made from a resilient alloy, this cycle trainer skewer is durable, wearresistant, and sturdy, avoiding deformation or rust for longterm use. Maximized Bike Adaptability: Provides three thread pitch options P1.0, P1.5, and P1.75 and fits 135148mm rear axles, ensuring seamless biketrainer connections across a wide range of bike models. Use scenarios You own multiple bikes (for example, road and gravel) and want to train on a single trainer: select the appropriate thread pitch and spacers to achieve a secure fit for each bike model. Your current thruaxle is worn or incompatible with the trainer: it with this adapter for continued reliable indoor training without a trainer. You travel or switch bikes frequently: the adjustable spacers and multiple thread pitches simplify switching between bikes with different rearaxle widths, reducing setup time.