tyres for hybrids

[Apeman]

My pal has bought a Cube Hybrid and wants to know the narrowest tyre he can put on to reduce road drag. I reckon he could go to 25s. Any ideas welcome bearing he will be on roads all the time.

 

[Banjo]

Sheldon Browns website has info on what tyres go on what rims. Link here..http://www.sheldonbrown.com/tire_sizing.html

Scroll down until you come to a red and green graph which shows which tyre widths will fit on different rim widths.