There's a lot of BS on the web about Froome's diet. Note the lack of quotes: red flag. If you want to read what Froome himself says about his diet, read this: https://www.redbulletin.com/int/en/s...nutrition-tips
He eats carbs like anyone else, though he puts more emphasis on protein than do most.

There's no proof that eating low carb produces better performance. OTOH there is a lot of evidence that performing low-carb produces better performance. IOW try to eat as little as possible during a ride but drink plenty of water. You can also try to eat as little as possible, of anything, before a ride. Then get plenty of carbs after the ride to restore glycogen. This regimen improves performance in everyone. It also takes weeks or months before one's metabolism changes to increased fat burning, which is one of the main purposes of base training.

There are some LCHF athletes who eat that diet when they are not performing but then eat plenty of carbs during their activities. There are claims saying that works, too, but I don't know if their performance differs from those who eat the usual percentages of macros.

Eat small portions and ride and eat like Froome says he does and you'll have fun on your bike, which is the whole point.