Comment by _coldfire 9 years ago Metal on metal also has a fraction of the rolling resistance. 1 comment _coldfire Reply gsnedders 9 years ago Though it looks like they're still rubber-wheeled with a guide-rail down the centre rather than steel-wheel on a pair of running rails.
gsnedders 9 years ago Though it looks like they're still rubber-wheeled with a guide-rail down the centre rather than steel-wheel on a pair of running rails.
Though it looks like they're still rubber-wheeled with a guide-rail down the centre rather than steel-wheel on a pair of running rails.