I wouldn't call 622x18 wide, but rather standard. I've run everything from 20-32s on rims that wide. Narrow tires mate with the rims VERY well aerodynamically and yes, I've field tested this! I am measurably slower when I run a 23mm tire on a 18mm rim as opposed to a 20 (same tires, tubes and rims).
However, wider tires mate better with wider rims. Right now I'm running 22-24mm wide rims (22 on the roadbike, and a 24mm wide 29er rim for my commuting wheelset). 23mm tires mate wonderfully with the 22 rim. The 32mm tires that I use for CX and commuting match up very nice with the 24mm wide rim.
Definitely agree with you about "horses for courses" though. I ran a 20mm tire up front in a crit once. Never again.
In God we trust, all others bring data.
- W. Edwards Demings
If God invented marathons to keep people from doing anything more stupid, the triathlon must have taken Him completely by surprise.
Specificity, specificity, specificity.
The plural of "anecdote" is not "data".
- Frank Kotsonis
| current weight: 190.0