Adjustable length for versatility The trainer axle features an adjustable length with spacers to accommodate thruaxle hubs from 135 mm to 148 mm, fitting bike frames up to 176 mm wide for compatibility across different models. Stable training experience Tapered heads on both ends provide a secure fit in most trainer mounting holes, reducing slippage and improving stability during workouts. Aluminum alloy build Made from 6061 aluminum alloy for durability and longevity, able to withstand regular use without compromising strength. Enhanced frame protection Tailored spacers protect your bike frame against potential damage during intense training by fitting snugly into the dropout shape. Use scenario: road and gravel bikes Ideal for 135 to 148 mm thruaxle spacing on road and gravel bikes; adjust length with spacers to fit frames up to 176 mm wide and ensure a stable trainer connection. Use scenario: multimodel compatibility Works across various models with up to 176 mm frame width; switch between bikes without changing hardware. Use scenario: intensity training with protection During intense intervals, tapered heads and snug spacers minimize movement and protect the frame dropout from wear.