+Ernesto De Obaldía, you'd likely need a 53 or maybe a 57. You may want to go to a bike shop and be fitted for a bike to know for sure. You can also call us for help - 904.425.1366. We have a newer version of the Forza, and here's the link: www.roadbikeoutlet.com/road-bikes.html - Please let us know if you have any other questions.
I hope so. If you need to return it you can, but the shipping is expensive. I'll cross my fingers that it fits you. Please let us know how it works out. Email via service@roadbikeoutlet.com or phone 904.425.1366 will be best. Thanks!