This question is about Cycling
Yes, potatoes can be a good fuel source for cycling. Potatoes are a good source of carbohydrates (the preferred fuel source for working muscles), are easily digested, and offer similar performance improvements to sports gels [ 1 1
[1] Salvador, A.F., McKenna, C.F., Alamilla, R.A, et. al. (2019). Potato ingestion is as effective as carbohydrate gels to support prolonged cycling performance. Journal of Applied Physiology, 127(6), 1651-1659. https://doi.org/10.1152/japplphysiol.00567.2019