http://www.mtridersclub.co.uk/styles/pr ... esheet.css
notice that you have not made any changes to the width of the wrap at all.
not sure what you did.
download the stylesheet.css file to your computer using ftp only.
using your text editor, edit the file.
using your ftp, upload it back.
go to your admin panel, main page, purge the cache button.
go to the index, refresh your browser.