vladi wrote:

Could you please elaborate on tires a bit more?

There can be a large difference in wattage between tires due to factors such as rolling resistance, aero, puncture protection.

Some general guidelines:
Tire width should be less than 105% of wheel width (tires typically measure wider than advertised)
If you flat on a sprint, the race is probably over (tubeless can offer better puncture protection, especially with sealant use).
20/23 conti supersonics, latex tubes

Good places to start:

Tom Anhalt's blog offer some information including a rolling resistance spreadsheet:
http://bikeblather.blogspot.com/


Josh Silca's 5 part series on his blog gives some good insight into pressure and other factors affecting speed:
https://silca.cc/blogs/journal?page=2