They say you can mix it half strength and use it as a ride beverage. I think it's kind of hard to digest to use during the ride, it probably depends on your level of exertion. If you try it, I recommend just putting it in one bottle. If your stomach starts to feel like there's a lump of lead in it, drink the Gatorade instead and save the Endurox 'til after the ride. I use Cytomax during the ride, but I can't say that I can tell a difference between it and Gatorade, Powerade, etc. I don't care for Accelerade. Just doesn't work that well for me. Your mileage may vary.

Different question... how long have you been riding at this distance & frequency? If you're "pushing the envelope" pretty hard, you can expect to be pretty wiped out. Still, getting some carbs that your body can metabolize quickly right after the ride will help get you over the post exertion slump more quickly.