Best Energy Gels and Bars for Long Cycling Rides
Proper fueling during long rides keeps your power steady and your mind sharp. We'll show you how to pick the right gels and bars for your next century or mountain pass.
Your legs hit a wall around kilometer 80. The power drops, cadence falls, and suddenly that headwind feels twice as hard. You've heard about cycling energy gels and bars, but you're not sure which ones work, when to take them, or whether they actually make a difference. They do — if you choose right and use them correctly.
Why Fueling Matters on Long Rides
Your glycogen stores run dry after about 90 minutes of hard riding. Once that happens, your body shifts to burning fat, which is slower to convert into energy. You'll feel it: legs get heavy, focus drops, and mental fatigue kicks in hard. A carbohydrate-based gel or bar can restore glucose to your bloodstream within 15–20 minutes, keeping your pace steady and your brain sharp.
Research from the Journal of Sports Sciences shows that riders who fuel at the right intervals maintain power output 8–12% better than those who don't. On a four-hour ride, that's the difference between finishing strong and grinding the last hour.
Gels vs. Bars: When to Use Each
Energy gels are carbohydrate concentrates in pouches. They digest fast (15–20 minutes) and require water to be absorbed properly. Gels work best when you need quick energy — late in a ride, before a hard climb, or when stomach space is tight.
Energy bars are solid, with a mix of carbs, protein, and fat. They digest slower (30–45 minutes) and don't need water. Bars work better early or mid-ride when you're not yet in the bonk zone, and when you want something that feels like food.
A practical approach:
- First 90 minutes: food from home (oats, toast, banana) or a bar if you're already out
- 90–180 minutes: a bar or two gels with water
- Beyond 180 minutes: alternate gels and bars every 45 minutes, always with 200–300 ml of water
What to Look For in a Gel or Bar
Carbohydrate content is the main event. A good gel has 20–25 grams of carbs per pouch. A good bar has 30–50 grams, depending on size and your calorie goals. Too little and you won't get the energy boost; too much at once and your stomach won't handle it.
Ingredient mix matters. Simple sugars (glucose, sucrose) work fastest. Some gels add fructose for variety, which can reduce stomach bloat compared to pure glucose. Bars with oats and dates digest a bit slower but feel more like real food.
Electrolytes in gels (sodium, potassium) help with hydration and muscle function, especially on hot days or rides over three hours. They're a nice-to-have, not essential.
Flavor and texture are personal. If you hate the taste, you won't use it consistently. Test new products on training rides, not race day.
How to Plan Your Fueling on Windy Days
Headwind and crosswind add muscular and mental load. If you're riding into a sustained headwind, your energy expenditure climbs 15–25% compared to calm conditions, depending on wind speed. That means you need to fuel sooner and more often than you would on a sheltered day.
This is where MoguWind Plan comes in handy. You can see the wind forecast for each kilometre of your route before you ride. If the route profile shows a headwind section between km 40 and 80, you know to pack an extra gel or bar for that stretch, and to fuel up before you hit it. By matching your fueling strategy to the actual wind you'll face, you stay ahead of the bonk instead of chasing it.
The MoguWind app on Garmin also shows you wind intensity at each point during your ride, so you can adjust your pace and fueling on the fly. If a headwind section comes earlier than expected, take fuel sooner. If you catch a tailwind, you can save a gel for later.
Practical Packing Tips
Store gels and bars where they're easy to grab: jersey pockets, saddle bag, or frame bag. Keep them at room temperature — cold gels are sluggish to digest, and bars can harden in the cold.
Carry more than you think you need. It's better to finish with leftovers than to bonk because you miscalculated. On a 3-hour ride, aim for 150–200 grams of carbs total from fueling. On a 5-hour ride, plan for 250–350 grams, depending on your weight and pace.
Always pair gels with water. Drink 150–200 ml of water per gel, sipped over 10–15 minutes. This keeps absorption steady and avoids stomach upset.
The Bottom Line
Energy gels and bars are not luxury — they're fuel. The right choice keeps your glycogen topped up, your power stable, and your mind clear. Start with gels or bars that match the first 90 minutes of your ride, then settle into a rhythm: a gel every 45 minutes, or a bar every hour, always with water. Test products on training rides to find flavors and brands that sit well in your stomach. And if you're riding in wind, plan your fueling around the sections where you'll need it most. Your legs will thank you.