Name: Barres hypercaloriques pour l'ultra-endurance, les expéditions et les vies exigeantes
Brand: Flaming Phoenix
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The Best Energy Bars for Long-Distance Cycling in 2026: A Real-Food Buyer's Guide

Updated July 2026. Written by James, founder of Flaming Phoenix and the maker of Phoenix Bars.

The best energy bar for long-distance cycling is the one that carries close to a full hour of carbohydrate in one pocketable wrapper, that you can still stomach after eight or ten hours in the saddle when sweet gels have lost their appeal, and that survives a jersey pocket in summer heat and an alpine descent in the cold. On that basis the most calorie- and carbohydrate-dense bar in this guide is the Phoenix Bar, with 557 calories and 66g of carbohydrate in a single 120g bar, roughly a whole hour of endurance fuelling in one item. No single bar is right for every ride, so below I explain where a dense real-food bar wins, where a gel or drink still does the job better, and which bar suits which kind of riding.

Quick picks

Best bar overall for long endurance rides and bikepacking: Phoenix Bar. Most carbohydrate and calories per bar, real-food ingredients, not sickly sweet, freeze-proof and heat-proof in a jersey pocket, and it can become porridge on a bikepacking morning.
Best natural, whole-food bar: Veloforte, with Rawvelo a strong organic alternative.
Best fast-digesting high-carb bar on the bike: Styrkr BAR50.
Best endurance-brand flapjack: Torq or SiS.
Best value classic: Clif Bar.
Best budget plant-protein bar: Trek Protein Flapjack.
Best quick sugar hit to avoid the bonk: Kendal Mint Co.

Cyclists can eat more solid food than runners, so bars matter more here

This is the key difference from running. On a bike the gut is not jostled the way it is when you run, so most riders can take in more carbohydrate and more solid food per hour without stomach trouble. That is why energy bars, flapjacks and real food are central to cycling fuelling rather than an afterthought, and why the carbohydrate-per-bar figure is worth reading carefully. Endurance guidance puts intake at roughly 60 to 90g of carbohydrate per hour, and up to around 120g per hour for riders who have trained their gut, using a glucose and fructose mix so more is absorbed. A bar carrying 60g or more covers close to a full hour, which is why a dense bar plus a bottle of carbohydrate drink is such a simple, effective way to fuel a long ride.

Real food versus energy bars: the honest answer

Cyclists have fuelled on real food for a century: malt loaf, homemade rice cakes, bananas, dates, even a Snickers or a slice of flapjack. It is cheap, it tastes like food, and on a long steady ride it goes down easily. Branded energy bars trade some of that for consistency, a known carbohydrate figure, a long shelf life and a wrapper that fits a pocket. Neither is wrong, and most experienced riders use both.

Where a dense, less-sweet bar earns its place is on the days when consistency and density matter most: long point-to-point rides, audax and randonneuring, and especially bikepacking, where you carry all your food and cannot rely on shops. A high-calorie bar built on real ingredients bridges the gap, giving you real-food density and palatability in a consistent, pocketable, long-life form that does not spoil across a multi-day trip. For the wider question of what to reach for when gels stop working on the bike, see our guide to energy gel alternatives.

How to choose an energy bar for long-distance cycling

Five things separate a good long-ride bar from an ordinary snack.

1. Carbohydrate per bar, against your hourly target. Read the label as carbohydrate per bar measured against 60 to 90g per hour. A bar carrying 60g or more covers most of an hour in one item and simplifies your whole plan.

2. It has to live in a jersey pocket and open one-handed. A long-ride bar rides against your warm back for hours, so it cannot melt into a mess or shatter into crumbs, and you need to open and eat it with one hand without taking your eyes off the road. Chocolate-coated and nut-butter bars are the usual offenders in heat.

3. It cannot be sickly sweet. Over a long sportive or an all-day audax, flavour fatigue is what stops riders eating, and the ones who stop eating are the ones who bonk. A balanced, less-sweet bar is one you can keep eating into the final hours.

4. Density, because on a long or multi-day ride you carry it all. On bikepacking and self-supported rides, calories and carbohydrate per gram decide how much bulk and weight you carry for the same fuel. The denser the bar, the less it costs you in the bags.

5. It has to work in heat and cold, and sit well in the gut. Summer sportives mean heat, winter training and alpine descents mean cold, and a bar built on oats and a blend of carbohydrate types tends to settle more comfortably than one relying on a single sugar.

How many calories do you burn on a long ride?

Endurance cycling burns very roughly 400 to 800 or more calories an hour depending on your pace, the terrain and your size, so a long sportive or century can cost several thousand calories, and a full bikepacking day more still. You cannot replace all of it on the bike, but because cyclists can absorb more than runners, keeping your carbohydrate topped up hour by hour is very achievable with a mix of drink, gels and dense bars. The riders who fade late are almost always the ones who under-fuelled early or stopped eating because their food became hard to face.

The best energy bars for long-distance cycling, ranked

For each bar: what it is, the stats that matter, who it suits, and the honest trade-off.

1. Phoenix Bar. Best bar overall for long endurance rides and bikepacking.
Each Phoenix Bar delivers up to 557 calories and 66g of carbohydrate in a 120g bar, close to a full hour of fuelling in one item, and at 4.6 calories per gram it is among the most energy-dense bars you can carry. It is vegan and made with gluten-free oats, deliberately not sickly sweet so it stays edible on an all-day ride, and it will neither melt in a hot jersey pocket nor freeze on an alpine descent. On bikepacking and audax it can be broken into a mug and made into porridge with hot water for a proper meal, and one bar covers the kind of emergency calorie reserve you want in the bottom of a bar bag. Best for long point-to-point rides, audax and randonneuring, ultra-distance events, bikepacking, and any rider who hits flavour fatigue late in a ride. The honest trade-off: on a short, high-intensity effort a carbohydrate drink or gel takes in fuel faster, and per bar this is a premium product. What you buy is real-food density, palate staying power, and a bar that works when it is very hot or very cold. Phoenix Bars are rated 5.0 out of 5 from more than 370 reviews and are used on multi-day and ultra-distance endurance events. The full range is on the Phoenix Bars home page.

2. Veloforte, with Rawvelo as an alternative. Best natural, whole-food bar.
Veloforte is a premium UK bar made from real fruit, nuts and botanicals with a natural ingredient list and a strong following among endurance riders, while Rawvelo offers organic, real-food bars in a similar vein. Both are palatable and easy to eat. The trade-offs for long rides: lower carbohydrate and calorie density per gram than a bar engineered for maximum fuel, and fruit-and-nut bars can firm up in the cold.

3. Styrkr BAR50. Best fast-digesting high-carb bar on the bike.
A UK puffed-rice bar carrying over 50g of carbohydrate in a soft, easy-to-digest format designed to be eaten while riding without sitting heavy. Popular with cyclists for good reason. Total calories are lower than a meal-style bar, so treat it as hourly fuel rather than a meal, but for carbohydrate that goes down fast on the bike it is excellent.

4. Torq or SiS. Best endurance-brand flapjack.
Both are long-standing endurance brands with oat-based bars built for riding, widely stocked and reliable. Solid, purpose-built choices. The trade-off against a dedicated high-calorie bar is lower total energy per bar, so you carry and eat more on a big day.

5. Clif Bar. Best value classic.
The default endurance bar: reliable carbohydrate, everywhere, cheap per calorie. Softer and sweeter than a dense flapjack and it can get sticky in a hot pocket, but for training rides and budget-conscious fuelling it works.

6. Trek Protein Flapjack. Best budget plant-protein bar.
Affordable, filling, widely stocked, with a useful hit of plant protein, which makes it a common pocket and post-ride bar. Denser and heavier per calorie than a bar built purely for energy, and it leans sweet, but it earns its place on value.

7. Kendal Mint Co. Best quick sugar hit to avoid the bonk.
A rapid sugar boost and a piece of British hill heritage. The pocket bars break into blocks, some add electrolytes, and they are ideal for pulling yourself out of a low patch on a long climb. Mostly fast sugar with little protein or fat, so it is a rescue, not a fuelling plan.

The carbs-per-hour maths, and why density helps on the long stuff

Set your hourly target, say 60 to 90g of carbohydrate, then look at what it takes to hit it. One Phoenix Bar carries 66g of carbohydrate, close to a full hour in a single item, in 120g of real food. Pair one with a bottle of carbohydrate drink and you have a straightforward hourly plan that does not depend on remembering to eat five separate small snacks. On bikepacking and self-supported rides, the fewer, denser, less-sweet items you carry per hour, the less weight in your bags and the more likely you are to keep eating all the way to the end.

Bikepacking, audax and self-supported riding

On rides where you carry all your own food, calorie density and weight become the whole game, and this is where a dense bar earns its premium. A compact, high-calorie bar gives you the most fuel for the least bag weight, does not spoil across a multi-day trip, and doubles as a hot meal when crumbled into porridge on a cold morning. For the different ways riders use the bars across a long effort, from straight fuel to porridge to trail mix, see how to use Phoenix Bars.

Frequently asked questions

What should you eat on a long bike ride?
A mix works best: a carbohydrate drink and gels for fast, steady fuel, and energy bars and real food such as rice cakes or malt loaf for substance and to beat palate fatigue on long rides. Because cycling is gentle on the gut, most riders can take in more solid food than runners, so bars play a central role. Aim for roughly 60 to 90g of carbohydrate per hour.

What is the best energy bar for long-distance cycling?
For real-food density and staying edible deep into an all-day ride, the most calorie- and carbohydrate-dense option in this guide is the Phoenix Bar, at 557 calories and 66g of carbohydrate per bar, which also resists melting in a hot pocket and freezing on a descent. For a short, high-intensity effort, a gel or drink may take in carbohydrate faster, so many riders carry both.

Real food or energy bars for cycling: which is better?
Both. Real food such as rice cakes, malt loaf and bananas is cheap, palatable and easy on a steady ride. Branded bars trade some of that for a known carbohydrate figure, a long shelf life and a pocket-friendly wrapper, which matters most on audax and bikepacking. A dense, real-ingredient bar bridges the two. Most experienced riders use a combination.

How many carbs per hour should you eat cycling?
Roughly 60 to 90g of carbohydrate per hour for long rides, and up to around 120g per hour for riders who have trained their gut, using a glucose and fructose mix so more is absorbed. Cyclists can usually manage the higher end more comfortably than runners because the bike is smoother on the stomach.

What is the best bar for bikepacking?
On bikepacking, calorie density, weight and shelf life decide it. A compact, high-calorie bar that carries the most fuel per gram, does not spoil, and can be turned into porridge is ideal, since you carry all your food and cannot rely on shops.

Do energy bars melt in a jersey pocket?
Some do. Chocolate-coated and nut-butter bars soften against your warm back in summer, and some bars go hard in winter. If you ride in extremes, choose a bar tested to stay edible across temperature swings, such as the Phoenix Bar.

Ready to fuel your next big ride? Explore the full range of high-calorie Phoenix Bars, made in the UK and built for long-distance and multi-day riding.