Hi,

I've been looking to by a used 2010 quintana roo seduza and I am not sure whether I should get a medium or large. I'm around 6 ft tall with a 34 inch inseam, also my arm span from finger tip to finger tip is 6ft 3.5 in. Anyone have any ideas on the size I should buy? I posted the dimensions below: (don't pay to much to the inflated C-T length its due to the seat tube sticking up above the top tube height a bit)


size: XS-48 S-50 M-54 L-58
Seat tube C-T (cm) 50 54 58 62
Top tube length (cm) 49.5 50.5 53 56.5
Head tube length (cm) 10 8.5 11 15
Head tube angle 72.5 72.5 72.5 72.5
seat tube angle 78 78 78 77
Chainstay length (cm) 38.5 38.5 38.5 38.5
wheelbase (cm) 95.2 95.1 98.3 101.2
standover height (cm) 69.8 72.8 76.2 80
Front center (cm) 57.2 57.7 60.5 63.9
BB drop (cm) 4 6.8 6.8 6.8
Fork Rake (cm) 4.2 4.8 4.8 4.8
wheelsize 650 700 700 700
stack 45.3 48.6 51.4 55
reach 39.4 38.8 40.7 43

I have a '03 Tequilo, am 5'11 and have a 30" inseam. I am riding a medium and it fits me perfectly. Sounds like you outta try a large. Be aware that the top tube size is just as important, especially for comfort and efficiency in the aero position. I rode a lot of bikes before settling on a QR for the fit and feel of the cockpit.