Calculate your ideal Effective Top Tube (ETT) and Reach for a perfectly balanced riding position.
Ideal Effective Top Tube
0 mm
Primary Length Metric
Frame Reach0 mm
Horizontal distance
Stem Length90 mm
Recommended
Ape Index1.0
Arm-to-Height Ratio
Understanding Reach: Modern mountain bikes use a “Long Reach / Short Stem” philosophy for stability, while Road bikes rely on the Top Tube length and stem to balance weight over the front wheel.