Features: Adapts a thru axle hub bike for a Saris bike trainer Fits most 142x12mm thru axle bikes with 1.00 or 1.75 thread pitch Made from highest quality materials to allow high levels of hardness and sturdiness Designed for indoor trainer use only Compatible with current Saris-branded basic trainers Not compatible with CycleOps "PRO" or PowerSync trainers Made in the USA