100g carbs in 500ml DIY drink · Roadman Cycling Collective +

100g carbs in 500ml DIY drink

Hi all — looking for advice on a DIY high-carb bottle.

I’m planning a 500ml bottle with 100g carbs using maltodextrin + “dextrose” (glucose) (I can swap to fructose if that’s smarter). I’ve seen suggestions that maltodextrin + fructose is better for higher intakes, but I’m not sure on the best ratio or how to avoid GI issues with such a concentrated mix.

Questions:

If aiming for 80–100g carbs/hour, what ratio would you use (e.g., 1:0.8 malto:fructose vs 2:1)?
If I stick with maltodextrin + dextrose, is it meaningfully worse than adding fructose?
Any practical tips to reduce stomach risk with 100g/500ml (sip + chase water, split across bottles, etc.)?
How much sodium/electrolyte would you add to a bottle like this?

Context: UK riding, mix is mainly for longer rides; I can carry an extra water bottle.

Thanks — interested in what’s worked in the real world (and what’s backfired).

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