Featuresr high strength and high end aluminium alloy rollerr 3 screw fixed stand super stable triangle structurer roller distance adjustment hole design fits 16 29 mountain bike road bike folding bike etcr widening and thickening stable baser highly tough belt very durabler foldable design without wasting space after foldingr r note there must be a noise from tire friction to some degree when cycling on the cycling roller indoors it is normal and not as a quality problem