I keep on breaking spokes on the drive side and the non drive side of my training clinchers. The rims are MA-40 Mavics and the hub is Suntour Superbe Pro. It is 36 spoke, cross 3 and 12 gauge spokes. The spokes snap at the hub bend during a heavy sprint. The wrench here, says that for a strongish (glowing me) rider of around 160 lbs, the rear wheel requires better than 12 gauge, no matter how smooth the roads are. He wants to rebuild using double butted 14-12-14 gauge also cross 3. He also says that straight 12 gauge is for weight weenies, not the real world. I am ashamed to say that I thought all along that the higher number is the lighter wire (not the other way around). This wrench is Spanish only speaking, and my Spanish is only fair. Is his advise on the money? Garth Libre Surfside Fl