I want to ride faster

[RoadRaven]

Hi... me again

Lise... technically speaking 28cm tyres are still "fats".

When you can, get some 23cm tyres (like Triske also describes) which are racing slicks. You can get several tread types, true "slicks" are treachorous on a wet down-hill or heavily cornered ride, but they are awesome in a TT...

If you wanna do a quick check on what will be fastest, check out what the pros choose - def not 28cm...

So, when you can, get some 23cm slicks and make another comparison
Enjoy your experimenting



EDIT: Oh, and I meant to also add that over a shorter distance you may only be talking seconds difference... over a moderate distance, perhaps a minute or two... it depends how you ride... as well as all the other variables as you have mentioned - weather, temperature, time of the month, health, hydration, nutrition etc tec

The best way to "test" your time is over a set course or courses as you have. I have a flat out and back 15km course, a couple of short steep hill courses, and a rolling to flat course with a consistent wind.