Originally Posted by
CACycling
I swapped out the stock tires on my wife's comfort bike (26 x 1.95 similar to the Kenda Kross tires the OP mentioned) for the 26 x 1.25 tires I mentioned in my earlier post. She instantly picked up roughly 3 MPH average speed (going from 12 MPH to 15 MPH was a huge difference). Maybe it was all in her mind but it showed up clearly on my cyclocomputer.
This seems right to me. I cannot imagine it's 'just feel'. Big freaking knobbies vs. nothing? How can you not be faster?