I'm considering the Rival RB11 Evo or RB10 for bag work and the RS11 Evo for sparring. I contacted Rival's customer support to ensure the right size for me and they suggested I get 16 oz sparring gloves and 12 oz (L) bag gloves. Considering I'm 240 lbs (hopefully not for long), I can see why 16 oz is required for sparring. My hands are normal (not big) so the L-sized bag glove recommendation also makes sense. However, I'm concerned that training on the heavy bag with 12 oz will see me completely out of breath when sparring with 16 oz. Is this a legitimate concern? (The other way around wouldn't be a problem, of course.) Alternatively, which high-quality 16 oz bag gloves available in Canada would you recommend instead? Elsewhere, some suggested that I just buy one pair of sparring gloves and use it on the heavy bag as well, but my understanding is that it will quickly make them inadequate for sparring. I'm an absolute (recreational) beginner, but my hands are important to me so I don't mind spending good money on high-quality gloves.
using 12 oz bag gloves and 16 oz sparring gloves shouldn't be a problem. You'll be tired and winded anyway until you learn to relax and breathe while training/sparring. That will come. Using the same gloves for bag work and sparring could be a problem. The bag work could wear the gloves out and if you're using an old canvas bag it could shred the hitting area and make it too rough for sparring. If you're using a leather bag or water bag, it could still shift the padding and make the gloves not useful for sparring. If you're going to be training alone or at home on the heavy bag, you might want to make sure that the gloves you get are easy to put on and take off by yourself. Some of them have straps that have to be wrapped around a few times tightly before they are fastened. Those are tough to put on/take off alone. EDIT: We've had good luck with Rival products, we've had bag gloves and sparring gloves and they've held up well. I don't know anything specific about the two gloves in your links, but they're Rival so you should get good service from them.
