I burned off a few Deserts on the rear of my F8. They are tough as nails, wear well and handle good but are spooky on wet pavement. They were discontinued in 17" a couple years ago so unless you have a line on old stock or an 18" conversion, they aren't really an option anymore.
Camel Tank auxiliary fuel tank for F series BMW twins. www.Camel-ADV.com
'09 BMW F800GS, '14 KTM 1190 ADV-R