Oversized bezel with 109mm outer diameter to fit 85mm Acewell speedometers into larger dash apertures.
The black anodised CNC aluminium top ring fits perfectly into BMW R80GS and similar binnacles which have a 105mm diameter speedometer hole.
When fitted with the lower plastic retaining ring, the speedometer is able to clamp into a dash mounting hole of between 93mm and 100mm, for example the BMW R75/5.
