Bonking isn’t a character flaw. It’s a chemistry failure. When your liver glycogen drops below a certain threshold, your brain literally shuts down muscle recruitment to preserve glucose for itself. Your legs feel like concrete. Your decision-making vanishes. And you’re still 30 kilometers from home.
This shopping list is built around the specific metabolic demands of cycling: sustained sub-maximal effort, high sweat rates, and the need for fuel that digests while your blood flow is diverted to working muscles. No gimmicks. Just the products and principles that work.
Why Your Body Needs a Different Fuel Mix on the Bike
Cycling is unique among endurance sports. Unlike running, where impact limits how much blood goes to your gut, cycling lets your digestive system keep working at moderate intensities. But at high output — say, a 45-minute threshold effort — your gut blood flow drops by up to 60%. That’s when solid food becomes a problem.
Your body burns a mix of carbohydrate and fat during any ride. The ratio depends on intensity. At zone 2 (conversational pace), you’re burning roughly 50% fat. At threshold, it’s nearly 100% carbohydrate. The average cyclist stores about 400-500 grams of muscle glycogen and 80-100 grams of liver glycogen. That’s roughly 1,800-2,400 calories of stored carb. At 300-400 calories per hour of burn (typical for a 70kg rider at moderate pace), you have about 4-6 hours before the tank hits empty.
The Two-Hour Rule
Under 90 minutes, you don’t need to eat on the bike — assuming you ate a normal meal within 3 hours of starting. Above 2 hours, you need fuel. The rule of thumb: 60-90 grams of carbohydrate per hour for rides lasting 3+ hours. That’s roughly 240-360 calories per hour from carbs alone. Protein and fat slow digestion, so save those for after the ride.
What Happens When You Ignore This
Bonking isn’t gradual. It’s a cliff. One minute you’re riding fine. The next, your power output drops 30% and you feel dizzy, irritable, and cold. Your body has switched to emergency mode — breaking down muscle protein for glucose. That’s not just uncomfortable. It undermines your training adaptations for the next week.
The Core Shopping Categories — What to Buy and Why
Here’s the short version: you need three categories of fuel for rides, and two categories for recovery. That’s it. Everything else is optional.
| Category | When to Use | Key Product Examples | Calories per Serving |
|---|---|---|---|
| Gels | During ride, especially high intensity | GU Energy Gel (100 cal), Maurten Gel 100 (100 cal), Hammer Gel (90 cal) | 90-100 |
| Drink Mix | During ride, steady fuel + hydration | Skratch Labs Sport Hydration (80 cal), Tailwind Nutrition (100 cal), Gatorade Endurance (100 cal) | 80-100 per scoop |
| Chews/Bars | Pre-ride, or during moderate pace | Honey Stinger Chews (80 cal), Clif Bloks (100 cal), Clif Bar (250 cal) | 80-250 |
| Recovery Drink | Within 30 minutes post-ride | Skratch Labs Recovery (250 cal), Hammer Recoverite (200 cal) | 200-250 |
| Electrolytes | All rides over 1 hour in heat | Nuun Sport (15 cal), SaltStick Caps (0 cal) | 0-15 |
Gels — The High-Intensity Fuel Source
Gels are concentrated carbohydrate in a small packet. They work because they hit your bloodstream fast — typically 10-15 minutes to feel the effect. The problem: some people get gut rot from them, especially when it’s hot or when they’re pushing hard.
GU Energy Gel ($1.50 per packet) uses a maltodextrin-fructose blend. That matters. Single-source carbs (maltodextrin alone) max out absorption at about 60g per hour. A blend of glucose and fructose can push that to 90g per hour because they use different transport channels in the gut. GU’s formula is solid for most riders. The caffeine versions (Espresso Love, Jet Blackberry) have 20-40mg per gel — enough to sharpen focus without jitters.
Maurten Gel 100 ($2.50 per packet) is the premium option. It uses a hydrogel technology — the gel forms a soft structure in your stomach that moves through the digestive system more gently. Riders who get GI distress from GU often tolerate Maurten. It’s also completely neutral in taste — no flavor, no acidity. The tradeoff: price and availability. You’ll find it in specialty running stores or direct from Maurten.
Verdict: Buy GU for everyday riding. Buy Maurten for race day or long hot rides where GI tolerance is critical.
When NOT to Use a Gel
If you’re riding under 90 minutes, skip the gel. Your body has enough stored glycogen. If you’re already nauseous, don’t force a gel — switch to a drink mix or chew instead. And never take a gel without water. It’s hypertonic, meaning it draws water into your gut. Without water to dilute it, you’ll cramp.
Drink Mix — Your Hourly Fuel Foundation
Drink mix is the most efficient way to fuel a long ride. It combines carbohydrate with electrolytes and water in one bottle. You sip continuously, which keeps blood sugar steady and hydration on track. No stopping. No chewing. No sticky fingers.
Skratch Labs Sport Hydration Mix ($1.20 per serving) is the gold standard for hot-weather riding. It has 80 calories per scoop, with 380mg sodium and 160mg potassium per serving. The sodium content is key — most riders lose 800-1,200mg of sodium per liter of sweat. Skratch uses real fruit powder (lemon, lime, orange) and cane sugar. No artificial sweeteners. No weird aftertaste.
Tailwind Nutrition ($1.50 per serving) takes a different approach. It’s designed as a complete fuel — 100 calories per scoop, with enough electrolytes and a small amount of protein (5g) to support longer efforts. Some riders find they can use Tailwind as their only fuel source for 4+ hour rides without needing gels. Others find the sweetness cloying after a few hours.
Verdict: Use Skratch Labs for hot days or when you want to pair with solid food. Use Tailwind for simplicity — one bottle, one source, no decisions.
A Common Mistake
Drink mix is not a substitute for water. If you put two scoops of Skratch in a bottle and sip it over 2 hours, you’re getting electrolytes and carbs — but you’re not getting enough total fluid. On a hot day, you need 500-750ml of fluid per hour. If your only bottle has mix, you’re under-hydrating. Carry a second bottle with plain water, or plan to refill at stops.
Chews and Bars — Chewing as a Mental Break
Sometimes you don’t want another gel. Chewing something — even something sweet and sticky — provides a mental reset. It also signals to your brain that you’re eating, which can help with perceived effort. But chews and bars come with tradeoffs.
Honey Stinger Chews ($1.00 per packet) are my pick for moderate-pace riding. They’re made with honey and brown rice syrup — less processed than pure maltodextrin. Each packet (8 chews) has 80 calories and 20g carbs. They’re easy to eat one at a time over 30 minutes. The texture is soft, not rock-hard like some chews after sitting in a jersey pocket for 3 hours.
Clif Bloks ($1.20 per packet) are similar but with a firmer chew. They come in flavors like Margarita (with salt) and Mountain Berry. The Margarita version has 170mg sodium per serving — useful for salty sweaters. The main downside: they can get sticky in heat. If you’re riding in 35°C, the Bloks will melt into a single blob in your pocket.
Clif Bar ($1.50 per bar) is a pre-ride or mid-ride option for easier days. 250 calories, 44g carbs, 10g protein, 4g fat. That’s a lot of protein for a ride. Protein takes longer to digest and can cause stomach issues at high intensity. Save Clif Bars for the first hour of a long endurance ride, or eat one before you start. Don’t try to eat one while climbing.
Verdict: Honey Stinger Chews for general riding. Clif Bloks Margarita if you want extra salt. Clif Bars only for pre-ride or very easy pace.
Electrolytes — The Overlooked Performance Factor
Most cyclists focus on calories and forget about salt. That’s a mistake. When you sweat, you lose sodium, potassium, magnesium, and calcium. If you replace water without replacing electrolytes, you dilute your blood sodium levels — a condition called hyponatremia. Symptoms: nausea, headache, confusion. In severe cases, seizures.
Nuun Sport ($0.50 per tablet) is the simplest option. Drop one tablet in a bottle of water. It fizzes and dissolves. Each tablet has 300mg sodium, 150mg potassium, and 25mg magnesium. Only 15 calories. No sugar. It’s not a fuel source — it’s pure electrolyte replacement. Use it on rides over 2 hours in hot conditions, or if you’re a heavy sweater (you’ll know if your jersey is white with salt crystals after a ride).
SaltStick Caps ($0.30 per capsule) are for riders who want precise control. Each capsule has 215mg sodium, 63mg potassium, 22mg calcium, and 11mg magnesium. Take one capsule every 30 minutes on hot rides. No taste. No sugar. No calories. They’re the choice of pro cyclists and ultra-endurance athletes because they separate hydration from fueling completely.
Verdict: Use Nuun when you want flavored hydration without calories. Use SaltStick Caps when you want precise electrolyte dosing.
Recovery — The Window That Actually Matters
The 30-minute window after a ride is real. Your muscles are primed to absorb glucose and amino acids. If you eat within that window, you replenish glycogen faster and start muscle repair sooner. If you wait 2 hours, your recovery rate drops by roughly 50%.
Skratch Labs Recovery Mix ($2.00 per serving) has 250 calories, 30g carbs, and 20g protein per serving. The protein comes from whey and milk protein isolate. The carb-to-protein ratio is about 1.5:1, which is close to what research suggests for optimal post-exercise recovery. Mix with cold water or milk. Chocolate flavor is the best.
Hammer Recoverite ($2.50 per serving) has 200 calories, 30g carbs, and 20g protein. It uses a different protein source — soy and rice protein — which makes it suitable for vegan riders. The amino acid profile is slightly lower in leucine than whey-based options, but it’s still effective. The taste is mild, not overly sweet.
If you don’t want a specialized recovery drink, chocolate milk works. Seriously. One cup (240ml) has about 180 calories, 26g carbs, and 8g protein. It’s cheap, widely available, and backed by research from multiple sports science labs. The downside: no added electrolytes, and the sugar content (about 24g) is from lactose and added sugar, not the specific maltodextrin blends that optimize glycogen resynthesis.
Verdict: Buy Skratch Labs Recovery if you want the best-tasting and most effective option. Use chocolate milk if you’re on a budget or traveling.
What to Do When Your Stomach Rebels
Gut issues are the number one reason cyclists fail to fuel properly. Here’s the failure mode: you’re 3 hours into a ride, you take a gel, and 15 minutes later you’re doubled over with cramps. You stop eating. You bonk 30 minutes later. The ride is ruined.
The most common cause is taking a hypertonic gel without enough water. Gels are concentrated sugar solutions. They pull water from your bloodstream into your gut to dilute them. If you’re already dehydrated, that causes cramping. Solution: drink 150-200ml of water with each gel. Not a sip. A proper drink.
Second cause: training your gut. Your digestive system adapts to what you feed it, just like your muscles adapt to training. If you only fuel once a month on long rides, your gut won’t be ready. Practice fueling on every ride over 2 hours. Start with 30g carbs per hour, work up to 90g over several weeks.
Third cause: the wrong product for your gut. Some people can’t tolerate maltodextrin. Some can’t handle fructose. Some react to caffeine in gels. The fix: test different products on training rides, not race day. Try GU, then Maurten, then Honey Stinger. Find what works for you.
If you’re consistently getting gut issues despite proper hydration and training, see a sports dietitian. There may be an underlying issue like fructose malabsorption or IBS that needs a tailored approach.
