I've found that anything between 30-60g of carbohydrates per hour of cycling is sufficient. Because the intensity of the Transbaviaans is relatively low, you'll probably rather go for 30-40 g carbs per hour in the first few hours and then up it a little during the last 2-3 hours of the race. Also, why do eat biltong on the ride? It takes a long time to digest as it's mostly protein and makes you feel "heavy". Rather try a peanut butter and syrup sandwich instead. Try to stay away from too much chocolate when you ride. It'll make you spike and then drop again, making you feel lousy on the bike. Rather try bananas and energy bars (pvm, jungle oats, etc.). Your other snacks are on the money!!
