800 Calories in a Bike Bottle
Endurance fuel for ultras, bikepacking, and adventure races. Real food you can drink ā just mix and go.
Find Your FlavorYou've trained for months. Your nutrition shouldn't be the weak link.
Gels are dead weight
800 calories in gels = 8 GU packets, half a pound of sticky wrappers. That's bulk, trash, and constant fumbling.
"Was I supposed to chew that?"
Try chewing a bar while redlining on a climb. Your jaw is tired, your stomach says no, and you're losing time.
Chews? Do the math.
800 calories in energy chews = 9 packets, 1.2 lbs of gummies. 4 Hour Fuel is 200g of powder mixed into water you're already carrying.
The simple fix
800 calories in a single bottle
4 Hour Fuel is a powdered endurance superfood ā real food ingredients you can drink. Mix in seconds. No wrappers, no chewing, no GI drama. Just efficient calories that keep you moving for hours.
Pick Your Flavor
Four flavors, one mission ā keep you fueled without slowing you down.
What Athletes Say
Used by expedition racers, ultrarunners, and bikepackers worldwide.
"It will always go down, and STAY down"
"Between expedition races and endurance MTB races, I keep a steady supply of 4HF on hand. Sometimes Iām yearning for something savory, sometimes Iām yearning for something sweet (Iām looking at you, Banana Chocolate!) - but it will always go down, and STAY down. Cheers to many many more miles of fun, fueled with 4HF!! "
"90% of our calories. We never got sick of it."
"24-hour races are all about efficiency if you want to be competitive. In the 2021 USARA nationals, we used 4-hour fuel as 90% of our calories. We never got sick of it and felt powerful on every stage. My team's race plan now includes 4-hour Fuel!"
Lebn Lovejoy
USARA Nationals 5th place - Team BlueJay
"The best supplemental calories in a mixable form I have ever found"
"My name is Mateo and I am an ultra endurance bike pack racer based in Bend, Oregon. I have been using your product now for a few months and cannot praise it enough. With the rigors of training, travel and racing, your product is honestly the best supplemental calories in a mixable form that I have ever found."
Stay Fueled
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Simple Ingredients
No artificial flavors, colors, or preservatives. Just what your body needs.
Proven Performance
Tested by endurance athletes in ultras, Ironmans, and multi-day events.
Stomach Friendly
Designed to be easy on your gut when the miles pile up.