The 3 Fueling Mistakes That Cause 90% of Century Ride Bonks
I've coached hundreds of century riders, and the same three nutrition mistakes show up over and over. Fix these and you're already ahead of 90% of the field.
Mistake #1: Eating for How You Feel, Not How You'll Feel
At mile 30, you feel great. You're not hungry. So you skip a gel. By mile 50, you're in a hole you can't climb out of.
The fix: Every bite you take at mile 30 is fuel for mile 75. You're always eating 45 minutes ahead. Set a watch alarm for every 15 minutes and eat regardless of how you feel.
Mistake #2: Starting Too Late
Most riders take their first gel at 45-60 minutes. By then, you've already burned through 30-50% of your muscle glycogen with zero replenishment.
The fix: Start eating at minute 20. A few bites of an energy bar, sips of drink mix — get the pipeline flowing before your tank starts dropping. Your gut needs time to ramp up absorption, and the earlier you start, the smoother it goes.
Mistake #3: One Fuel Type All Day
Eight identical gels over five hours is a recipe for taste fatigue, GI revolt, and eventually not being able to eat at all when you need it most.
The fix: Use a phased approach:
Miles 0-30: Solids (bars, rice cakes) + drink mix
Miles 30-70: Gels + drink mix (alternate flavors)
Miles 70-100: Liquid fueling primary + whatever your stomach tolerates
Mix sweet and savory. Rotate flavors. Your taste buds down-regulate after 3 hours of sugar — having salty pretzels or a different texture can reset your palate and keep fuel going in.
The Numbers That Matter
For a century at moderate intensity, most riders need 60-90g of carbohydrates per hour. That's roughly:
1 gel every 20 minutes, OR
1 gel + ongoing drink mix sips every 25 minutes, OR
Half a bar + a gel per hour in the first half, shifting to gels-only in the second half
Your personal number depends on your body weight, intensity, and trained gut capacity — but if you're eating less than 60g/hour on a century, you're almost certainly underfueling.
The Takeaway
Century rides aren't a fitness test. They're a fueling test. The riders who finish strong aren't necessarily the strongest — they're the ones who ate early, ate often, and ate smart.
If you want the complete 60-90-120 minute fueling system with personalized fuel plans, emergency protocols, and race day execution checklists — that's exactly what I built inside Century Fuel Coach.