What is the max/min rider height and weight?
Helix has been designed to accommodate riders between 5' to 6'4" and carry up to 250 lbs (113 kg). There is a large range of adjustability possible to achieve the desired fit.
Given the current spec, the saddle height can be raised or lowered to the appropriate height to accommodate a 5' - 6'4" rider. The saddle can also move forwards and backwards. The seatpost also has a 20mm setback that can be reversed to achieve a 20mm forward position. The stem has a 20mm rise that can be flipped to achieve a 20mm drop.
If any of these adjustments are not enough, it is always possible to replace the stem, seatpost, handlebar and crankarms to achieve a better fit. The seat post dimensions are 27.2mm x 400mm and the steerer tube diameter is 28.6mm.