Hi guys,

I need to fit in a tube, levers, some patches and rubber solution, chain breaking tool and spare links. Maybe cash. Should I get the small or medium

http://www.wiggle.co.uk/p/cycle/7/Le...ag/5360040994/

http://www.wiggle.co.uk/p/cycle/7/Le...ag/5360040995/

Putting it on a Specialized Toupe 143mm saddle. will it bulge out on the sides and chew my bibs?