I'm 100kg in weight, and 187cm tall, and I'm looking at the 58cm size. I'm planning to do a lot of sprint training on my new bike, and I'm wondering whether I'm risking my collarbone and teeth trying to save 500 dollars.
Thank you!
Welcome!
I've cycled with a lot of people, I can't think of many guys who were 100kg. Point being: you are very much an outlier at that weight. 2 consequences: as advised above, it's probably not advisable to buy a very lightweight frame. The thing is, you'd probably be fine, but if you're not, you'll end up paying for it in ways that retrospectively you'll feel were silly for the 100g of weight saved. Second, tyre clearance. Enjoying the bike is directly linked with comfort, even if nobody really wants to hear that. At that weight, honestly, I'd advise you run bigger tyres than 32C. And so, if you want to look watch YouTube content, the videos on the latest endurance/ all road bikes by Ribble may help. And Pirelli launched 35 and 40C slick tyres and they said they can't make enough of them, they fly off the shelves. So I'd suggest you look at long teng 301, for example. From the top of my head I can't think of too many road bikes that can take 35C or more, without becoming gravel bikes. I'm 80-84kg. 20 extra kilos is a LOT of weight without adjusting carbon materials, tyre volume and so on.
So, ultimately, get something that clears (way) more than 32C for comfort, and confirm with the factory that at your weight, they have no reservations. What matters is that you enjoy your time on the bike, safely.