Fueling Long Rides: A Practical Nutrition Playbook

Every rider I know has a bonk story. Mine happened on a hilly loop I'd ridden a hundred times, about three hours in, when my legs simply stopped answering the phone and the last ten kilometres home turned into a grim, wobbling crawl. The frustrating part is that it was entirely preventable. Fuelling a long ride isn't complicated, but it does need a plan you actually follow, and most of us don't until we've paid for it once or twice.

Why You Bonk in the First Place#

Your body runs on two main fuels while you ride: fat and carbohydrate. Fat is nearly unlimited even on a lean rider, but you can only burn it fast enough to sustain easy pedalling. The moment you push the pace, climb, or chase a wheel, your body leans hard on carbohydrate, which is stored as glycogen in your muscles and liver.

The problem is that glycogen is a small tank. You've got roughly ninety minutes to two hours of hard riding in there, depending on your size, fitness, and how full you started. When it runs dry, you don't get a warning light. You get the bonk: hollow legs, foggy thinking, sometimes a shaky, irritable feeling that experienced riders learn to recognise a few minutes too late.

The whole point of on-the-bike fuelling is to keep topping up that carbohydrate so you never fully empty the tank. That's it. Everything below is just the how.

The One Number That Matters: Carbs Per Hour#

If you remember nothing else, remember this: on rides longer than about two hours, aim to take in carbohydrate every hour rather than waiting to feel hungry or flat.

Rough targets I've found work for most riders:

• Rides under 90 minutes: water is usually enough. Maybe nothing else, unless you're going full gas.
• 90 minutes to 2.5 hours: somewhere around 30 to 60 grams of carbohydrate per hour.
• Long, hard rides and races (3 hours plus): work toward 60 to 90 grams per hour, and lean toward the higher end only if you've trained your gut for it.

That top figure comes with a caveat I want to be honest about: 90 grams an hour is a lot, and it only works if you're using drink mixes or gels designed with more than one type of sugar (typically glucose plus fructose), because your gut absorbs them through different doors. Try to shove 90 grams of a single sugar down and you'll spend the back half of your ride looking for a hedge. Most amateurs are perfectly well served by the 60-gram range.

To make it concrete, 60 grams of carbohydrate looks like roughly:

• Two standard energy gels, or
• One 750 ml bottle of a proper carbohydrate drink mix plus one gel, or
• A banana plus a small handful of dates plus a few sips of a sports drink.

Start Early, Not When You're Empty#

The single biggest mistake I see is waiting. Riders feel fine for the first hour, so they don't eat, and then they try to claw their way out of a hole once the legs go. It doesn't work like that. Once you're bonking, digestion is slow and miserable, and it can take twenty to forty minutes for food to actually reach your legs.

Start fuelling within the first 45 minutes, while you still feel great and your stomach is calm. Then keep a rhythm. I set a simple recurring alarm on my head unit for every 20 minutes as a nudge to take a few bites or a swig. It feels fussy for the first hour. It feels like genius at hour four.

A workable timing rhythm#

1. 0–45 min: ride steady, sip water, settle the stomach.
2. From 45 min: begin taking carbohydrate, small and frequent.
3. Every 20 min after that: a bite of a bar, half a gel, or several mouthfuls of drink mix — whatever adds up to your hourly target.
4. Last 30 min: if you're nearly home, you can ease off solid food, but keep sipping if it's still a hard effort.

Little and often beats one big feed. Your gut handles a steady trickle far better than a sudden brick of food, especially when your heart rate is up and blood is being pulled away from digestion toward your working muscles.

Drinks, Gels, and Real Food: Building Your Mix#

There's no single best fuel. The best fuel is the one you'll actually eat and your stomach will tolerate at effort. Here's how I think about the three categories.

Drink mixes#

A carbohydrate drink mix is the most underrated tool in the box because it delivers fluid, carbs, and electrolytes together. On hot days it's often the backbone of my whole plan. The trade-off is that you're locked into one flavour for the ride, and getting sick of sweet liquid three hours in is a real thing. My habit is to run one bottle plain water, one bottle mix, so I always have a palate cleanser.

Gels#

Gels are compact, predictable, and fast. They're brilliant for a hard climb or the closing hour of a race. The downsides: they're sticky, they generate wrappers you have to pocket (never litter — it's the one unforgivable sin out there), and taken without water some can sit heavily. Always chase a gel with a few sips unless it's specifically an isotonic one.

Real food#

For long, steady endurance rides — the four-hour café spin, the all-day adventure — real food keeps you sane. Options that travel well and sit kindly:

• Bananas (nature's gel, if slightly bruised by hour two)
• Rice cakes or small sandwiches with jam or honey
• Dates, dried figs, or fig rolls
• A slice of malt loaf or a homemade oat-and-syrup bar
• The classic café stop: a flapjack and a Coke has rescued more rides than any lab-designed product

The honest trade-off: real food is cheaper, tastier, and gentler over long durations, but it's slower to digest and less precise, so it's a poor choice when you're going genuinely hard. Match the fuel to the intensity.

Don't Forget Fluid and Salt#

Fuel and hydration are two sides of the same problem, and it's easy to nail one while ignoring the other. Dehydration will flatten you just as effectively as an empty glycogen tank, and it sneaks up faster in heat.

A few practical guidelines rather than rigid rules:

• Drink to thirst on cool days, and a bit ahead of thirst when it's hot.
• Roughly one bottle (500–750 ml) per hour is a sensible starting point, adjusted up in heat and hard efforts.
• On long or sweaty rides, include electrolytes, especially sodium. If you're a heavy or salty sweater — white crusty marks on your kit are the giveaway — you'll want more than a plain drink provides.

You don't need to weigh yourself before and after every ride like a lab rat, but doing it once or twice tells you a lot. If you finish a two-hour ride two kilograms lighter, you're under-drinking, simple as that.

Practise It Before It Counts#

Here's the rule that separates riders who fuel well from riders who just own a lot of gels: nothing goes in your race-day plan that you haven't rehearsed in training.

Your gut is trainable. Ride after ride of taking carbohydrate on board teaches it to absorb more without complaint, which is exactly why seasoned riders can handle 90 grams an hour that would floor a beginner. Use your long training rides as dress rehearsals:

• Test the exact products you'll race on, in the amounts you plan to use.
• Find out which flavours you can still stomach after three hours.
• Learn how your body reacts to caffeine gels, if you use them, and when in the ride they help most.
• Note anything that causes stomach trouble and cross it off the list for good.

A sportive or race morning is the worst possible time to discover that a new gel doesn't agree with you. Sort it out on a quiet Sunday when the only cost of getting it wrong is cutting the ride short.

Putting It Together: A Sample Four-Hour Plan#

To show how the pieces fit, here's a plan I'd genuinely run for a hard four-hour ride in mild weather:

• Before: a normal carbohydrate-based breakfast two to three hours out — porridge, toast, whatever sits well — plus a coffee.
• Bottles: one plain water, one carbohydrate-electrolyte mix, refilled at the halfway café.
• In the pockets: two bananas, two energy gels, a couple of rice cakes, and a small bag of dates.
• The rhythm: first food at the 45-minute mark, then something every 20 minutes, saving the caffeine gel for the final hour when the legs start negotiating.

That works out comfortably in the 60-grams-an-hour zone, mixes textures so I never get sick of any one thing, and leaves a spare gel for the emergency that occasionally shows up.

The Bottom Line#

Fuelling long rides isn't about expensive products or complicated formulas. It's about starting early, keeping a steady drip of carbohydrate going, drinking enough, and — crucially — practising the whole thing before the day it matters. Get those habits in place and the bonk stops being a lurking threat and becomes a story you tell about the bad old days. Set the alarm, pack the pockets, and eat before you're hungry. Your future self, ten kilometres from home, will thank you.