i would say the 28 will be faster!
even with high air load in te 40mm once, the 40mm wil be slower.
i think if u want to use the slick tires more, go for a 30 or 32 mm
that will end up as the best of both worlds i guess
What did you decide?Nano's are not particularly fast tires on hard roadsI have your conti's and they are a fairly fast tire. Also, The GP4000 in 28 I have is one of the fastest tires made, and measures 31 on my 22ID rims (or about 29 on 19ID rims)
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