The three that work for me:
- Heed, strawberry flavor. On longer events I’ll carry two bottles with Heed, shorter rides, just one.
- Clif Blocks, margarita flavored. I try to take in a block every 15 minutes or so but doesn’t always work out that way.
- GU roctane gels, vanilla orange flavor. About 1 per hour on long events.
I used to cramp pretty bad, even just doing a 2 hour cross country mountain bike race, but with the above and a lot more riding/training over the years I rarely if ever have issues nowadays and I’ve done some pretty long events–100 mile gravel and 50-60 mile mountain bike races.