32 Spokes will be fine for someone weighing 180...ah, but here comes the but! Most wheel builders like Peter White, Zinn, Sheldon Brown etc will tell you that if you want a reliable wheel with very little problems then go with the 36. A 36 spoke wheel will be a tad heavier, but the reliablity will more then make up for the increased weight. I weigh 165 and have used 36 spoke wheels for years and rarely do I have any problems. In fact all my wheel problems have been due to crashes or hitting a railroad track that wasn't flush with the road! Otherwise I never have any problems and rarely do I even have to true them.