Change 700c rim to 650c I've bought a road bike for my wife. The bike size is 45cm or XXS. The problem is, the frame is high for my wife. Can I change the rim from 700c to 650 to reduce the problem? For info, my wife height is 155cm and her inseam is 68cm.
Changing to a smaller wheel may cause other problems, such as needing brakes with a longer reach (that won't work as well), or the bottom bracket is lowered, so the pedals may ground around corners.
This bike is super small already - the fundamental problem is, as you have guessed, the wheel size, which governs the dimensions of the frame.
I would be looking at a bike with 26&quot; wheels, or even 24&quot; - they generally didn't make road bikes with these wheels, so you might need to adapt a mountain bike or a kids bike. It is quite possible to put road bars and gears on these frames.