I recently bought my first single speed/fixed gear bike. It's a biria w/ white weinmann rims. After doing research I figured their 55cm option would suit me best. I'm about 5'9-5'10.

When I got to the shop they had me stand over the frame of the 55cm and lift the bike. They then recommended I get the 48cm bike they had. I don't know too much about these bikes, so I took their advice.

Isn't 48cm too small for me? Or is there a chance they measure their frame sizes differently?

On a side note, I saw the bike online for $299, but when I got to the store it was tagged at $449. They honored the online price, but I thought about it and wondered if they recommended me the 48cm because they didn't want to get rid of their 55cm at that price.

Thoughts?

Thanks for looking