Bonking isn't a fitness problem.
It's a fuelling problem.
The truefuels system is built for long rides, sportives and the
moments where your legs want to stop but your race doesn't.
Informed Sport certified · Built by Alistair Brownlee · 4.86★ (200+ reviews)
60–90% of endurance athletes underfuel.
The wall, cramp and overheating are fuelling failures — not fitness failures.
Hitting the Wall
Most cyclists ride on 30–40g of carbs per hour. Race science puts the target at 60–90g. That gap doesn't show until hour three — then it shows all at once...
Energy Gels
40g of fast carbohydrates per gel — start at 40–60g carbs/hr in training, build gradually, arrive at race day absorbing 80–90g/hr without GI distress.
Shop NowCramps
Leg cramps on the third climb. Four to six hours in the saddle depletes sodium and potassium faster than most riders replace — water alone doesn't close that gap...
Electrolytes
390mg of sodium per sachet — matched to what your body actually loses in sweat, not inflated. Your hydration stays on track, from the first climb to the final descent.
Shop NowHeat
Summer sportives in Spain, France, or warm UK conditions — core temperature builds from the first pedal stroke. By the time you feel it, performance is already dropping...
CoreCtrl
4,000mg of L-Taurine per sachet — taken daily for 8 days before your event to help your body handle heat under load. Stay in control when the conditions turn against you.
Shop NowYour Race Fuelling Calculator
Enter your race details and get a personalised gel and electrolyte plan.
Products & Bundles
Start with a bundle or build your own stack. Bundles save you vs buying separately.
RACE READY SYSTEM
40× Energy Gels + 20× Electrolyte sachets + 8× CoreCtrl sachets + FREE truefuels bottle
TRAINING BUNDLE
20× Energy Gels (mixed low + high salt) + 20× Electrolyte sachets
Gel — Low Salt (0.25g)
40g carbs · 0.25g salt · cool rides · training
Gel — High Salt (1g)
40g carbs · 1g salt · summer rides · 4h+ efforts · heavy sweaters
Electrolytes
400mg sodium · 150mg potassium · 25mg magnesium
CoreCtrl™
4,000mg taurine · heat management · summer sportives
The Science
Energy Gels
Glucose uses SGLT1. Fructose uses GLUT5. The 1:1 ratio activates both transport pathways simultaneously — supporting absorption of up to 1.75g/min compared to 1g/min from glucose alone. Over a 4-hour ride, that's the equivalent of three extra gels worth of available energy. Start at 30–40g/hr and build gradually each week. The gut adapts to what you train it to handle.
Electrolytes
390mg sodium, 150mg potassium, 25mg magnesium per sachet — matched to sweat loss during endurance cycling. Not just for race day. The daily habit that helps keep neuromuscular function intact through a training week — and helps address the compounding deficit that causes cramps on long climbs.
CoreCtrl
4,000mg of L-Taurine, with potassium and magnesium to help support neuromuscular signalling under fatigue. Taken daily in the lead-up to your event, not just on the day. This is how you arrive at the start line with your reserves intact — and stay ahead of heat when conditions work against you on long summer rides.
"Cycling at elite level is a constant nutrition calculation. We built truefuels to handle that calculation for you."
— Alistair Brownlee, 2x Olympic Champion, truefuels co-founder
Alistair built truefuels because no existing product met the demands of elite triathlon — heat, duration, GI stress all at once. Tested by Alistair and 50+ elite athletes.
"Cycling at elite level is a constant nutrition calculation. We built truefuels to handle that calculation for you."
— Alistair Brownlee, 2x Olympic Champion, truefuels co-founder
Alistair built truefuels because no existing product met the demands of elite triathlon — heat, duration, GI stress all at once. Tested by Alistair and 50+ elite athletes.
Real fuel. Real sessions.
★★★★★ 4.86 from 200+ verified athletes
Useful tool in the nutrition box. Easy to digest even after many miles - added as a staple to my long distance running and cycling events. Good stuff.
The gels in my drink provided everything I needed for cycling. I first used them on the hottest day of the year and they replenished my salts brilliantly and a constant carb intake. I was able to maintain a consistent high level of output throughout this ride and others since. Excellent product and the right amount of flavour.
Very good taste and it is really doing the job - either during the excercise (indoor cycling!) or after a long run for recover purpose
Easy to digest and definitely gave me the carbs I needed for a long ride
Get a free personalised fuel plan for your next sportive or gran fondo.
Personalised gel and electrolyte plan based on your race distance, conditions and target time.
Your fuel plan is on its way.
Check your inbox — usually arrives within a few minutes.
No spam. One email with your plan. Unsubscribe anytime.
Frequently Asked Questions
At 60–100g carbs/hour over 4 hours: 8–10 gels (40g each). Use the calculator with your exact duration.
Start at 45–60 minutes. Take a gel every 30–45 minutes. On the bike you can eat more easily than running — don't wait until tired.
High-carb dual-transport gels — the same 1:1 glucose:fructose ratio that truefuels gels are built on. Up to 90g absorption per hour vs 60g from glucose alone.
Look for sodium, potassium and magnesium. truefuels sachets: 400mg sodium + 150mg potassium + 25mg magnesium.
40× energy gels, 20× electrolyte sachets, 8× CoreCtrl, FREE training bottle. £169.95.
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