Twiggy tube.
» size 20"
» Weight 84gs/0.16lbs
» Ultra light weight tube
» 0,6mm wall thickness

FattyLight tube.
» fat but lightweight 20" tube.
» Weight 216gs/0.48lbs
» Special butyl 20” rubber tube with extra large diameter.
» While inflating, the rubber won't expand as much as regular tubes do,
» so the tube wall thickness doesn't decrease.
» Therefore, less material is necessary and the FattyLight tube becomes
» a strong light weight tube.