Take the guesswork out of bike fitting. The Ergon TF2 Bike Fitting Tool Setback is a professional-grade measuring tool designed to help cyclists, bike fitters, and bike shops achieve precise, repeatable adjustments for the perfect rider-to-bike connection. Whether you're fine-tuning your current setup, comparing components, or transferring your ideal fit to a new bike, the TF2 delivers millimeter-accurate measurements that make dialing in your position easier, faster, and more consistent. Its innovative measuring technology allows you to accurately measure and adjust saddle height, saddle setback, saddle-to-handlebar reach, stem length, and crank length. Easily compare saddle and component positions when making changes or transferring your fit between bikes, even with different frame geometries. The TF2 also simplifies measurements of stem length and saddle-to-stem dimensions, making precise setup adjustments more efficient and repeatable. Built for durability and professional-level accuracy, the TF2 is an essential tool for bike fitters, bike shops, home workshops, and serious cyclists. Its versatile design maintains exceptional measuring accuracy across different bike types, components, crank lengths, and interface standards.