Jaco, my personal opinion on how many grams of carbs is the following: Its impossible to replace lost calories in an edurance event, but just be replacing a little bit your body can still be very efficient and perform. I dont agree with taking in 100grams of carbs that would bloat me terribly before and event, and it depends on how u r taking the carbs in and what type of carbs, for example a serving of 32Gi in a 750ml bottle of water, would bloat me too much. I go with 25grams in 230ml's of water instead, and 2 slices of low GI toast for breakfast with a bit of jam, if the race is soon after my morning intake then its ok to just sip on a little drink and or maybe nibble on something light. If its many hours afterwards well then you will need to snack on some more carbs to keep your levels topped up. BUT, lets look at South African reality. I am on the hub, so cycling is the focus, lets take it as we see it. Whats the average time of a cycle race in this country, 2.5 - 4hrs, most of the decent athletes are doing around 3 or so hours for events. So first off, what are your glycogen levels for an event. They should be full, and that all comes down to natural daily eating, ensuring frequent healthy meals, plenty of fruit and veg, and recovery meals after training session to restore glycogen. At top up your body can store around 500grams of glycogen which is existent in water of course, so a little more weight, but this should give you 90min - 2hours of energy, and just hydrating yourself and assist in good usage. So now take in a pre race meal, 2 slices of toast add another 60minutes of energy, plus and energy drink? So I think overloading on carbs leads more to discomfort than necessity. I have raced 94.7 on 2 bottles of water, finished in 2h21 and felt strong to the finish. My method, decent pre race meal, and the week before decent eating. I did it to prove to some colleagues that if your body is efficient at utilising its own natural stores ie: fat, glycogen, protein, then you dont need to go mad on carb feeding. If I go 3 hours, then YES, additional carbs required and I take in calorie not carb weight as a measurement so I will look to around 200-250calories per an hour in an ironman event, I use chews to keep my topped up, of course I am burning more than 250 an hour but direct replacement is not possible, fat store tapping is, and its an amazing fuel if you tap into it consistently. Bottom line, how many grams of carbs you require I think is not necessary, look more at the type of event you are doing, stick to the basics, and look at calories you are taking in per an hour to assist with energy balance. later ME