Ez nem kerdes. Szegyen gyalazat lenne, ha a regi jobb lenne. Azokat meg szemmel terveztek.
http://www.reynoldsc...is-wider-better
"I recently reviewed wheel wind tunnel data that I collected in 1989, and it surprised me to see that the overall aerodynamic drag values were similar to drag values of wheels manufactured and tested in 2014. With all of the significant advancements that have occurred in wheel design in the last twenty-five years, how is it possible that wheel drag has not improved significantly?
The answer is clear when we examine trends in tire diameters. During the late 1980s and early 1990s, 18 mm and 19 mm tires were popular. Because tire diameters were often smaller than rim widths, the separated airflow easily re-attached. As a result, aerodynamic drag values were similar to today’s.
Today’s drag values – derived from 25 mm tires mounted to a 25 mm or 26 mm rims - have a similar relationship to the tires and wheels from the late 1980s and early 1990s. The key similarity is that the separated airflow can re-attach, and this enhances aerodynamics. "
Nincs nagy eltérés? Csupán a mai szélesebb felnikre szélesebb gumi való&azzal lesz egységesebb a gumi-felni kettős, lesz hatékonyabb a rendszer légellenállás szemponjtából.
Csak őszinte leszek.. 24mm-es gumi 17.5mm belső szélességű felni kombó után a hátam közepére sem kívánom a 20-as gumikat 13mm-es csirkeráfon. 