Anyway... About the fabled and oftentimes puzzling 'Klein geometry': US built frames (Trek too) usually have a longer top tube (in relation to the seat tube) than European frames. Most in the latter category and about the size of this Quantum Race on offer here have a top tube that is 2 cm shorter. I'd advise a deeper riding position or a shorter stem (less than 10cm) to comfortably ride bikes like these. That, or just long arms/upper body.
Anyway... About the fabled and oftentimes puzzling 'Klein geometry': US built frames (Trek too) usually have a longer top tube (in relation to the seat tube) than European frames. Most in the latter category and about the size of this Quantum Race on offer here have a top tube that is 2 cm shorter. I'd advise a deeper riding position or a shorter stem (less than 10cm) to comfortably ride bikes like these. That, or just long arms/upper body.