Dimension A = 60mm rise.
See more dimensions at right
These risers adapt the X-Line Handlebars, Part Number 040-0710 perfectly to BMW R1100GS, R1150GS and Honda Africa Twin RD07. (To use heated grips you have to drill holes for the wires.)
When using normal dirtbike style handlebars, most riders prefer the 60mm rise handlebar risers for these bikes listed above.