Hi Joe.
Similar to you I started Keto in order to help my cycling, in my case it was to improve endurance as I have always struggled to eat on the bike.
This weekend I did a flat 46 miles in around 3 hrs, zone 2, at an average of around 145w. I felt no need to eat at all, and in fact I didn’t eat for a couple of hours after returning home - no hunger at all. It was very hot in the UK this weekend so I went through about a litre of water an hour. I add some zero carb electrolyte tablets to my bottle, these make a huge difference.
I am two months into Keto, 20-30g net per day, craving carbs often, but managing to resist. Ketosis markers have tailed off on the pee sticks, which leads me to conclude that I am getting fat adapted - no way I could sustain my exercise regime on 20g of carbs a day and feel as energentic as I do at the moment.
Keto has changed my cycling dramatically; I have never been a climber, I have much more of a sprinters build and generally I would be at the head of the pack in most bunch sprints.
But that has gone now, Keto appears to have robbed me of the ability to sprint like I used to. What has replaced it is much, much better endurance and I now have the ability to climb quite well.
So for me, adding back any level of carbs seems unnecessary, fat is very clearly now fuelling my rides, I personally don’t think that small hits of carbs would help me at this point.