This question is about Cycling
You should eat every 20-30 minutes on a bike ride. Eating small amounts more frequently provides muscles with a continuous supply of glucose and also minimizes GI upset. For longer rides, you should refuel 45-60 minutes after starting and consume 10-20 g/carbs every 20-30 minutes, for a total of 30-60 g/hour [ 1 2
Jeukendrup A. (2014). A step towards personalized sports nutrition: carbohydrate intake during exercise. Sports medicine (Auckland, N.Z.), 44 Suppl 1(Suppl 1), S25–S33. https://doi.org/10.1007/s40279-014-0148-z
Kerksick, C. M., Wilborn, C. D., Roberts, M. D., Smith-Ryan, A., Kleiner, S. M., Jäger, R., Collins, R., Cooke, M., Davis, J. N., Galvan, E., Greenwood, M., Lowery, L. M., Wildman, R., Antonio, J., & Kreider, R. B. (2018). ISSN exercise & sports nutrition review update: research & recommendations. Journal of the International Society of Sports Nutrition, 15(1), 38. https://doi.org/10.1186/s12970-018-0242-y