well based on size i would say the 138 (or 139 whichever that size is), but if youre used to using a 125 fish going to a 138 would be a big jump. I recommend the 134 for short term, but in the long run a 138 would help you more. take your pick
Does anyone else find the Ronix boards run a bit small? I ride a 143 Covin and my bro rides a 137 One, and they both seem shorter than that. Go for the 144! By the way, I'm about 5'11 180lbs and I wouldn't want the 143 Covin to be any smaller.
They measure them end to end. So if you have a board that is pointed on the ends you are really getting a smaller board. My ronix rep told me that the one is about 5cm smaller than they are marked due this.