inputs.text: know fast im really going 1991 westfalia vw van - due slightly oversize tires speedo reading always question even though milagemarker test close installing unit hud found 6miles limit 65 oregons limit i5 consistent 200 mile test similar unit son bought year ago installed 2013 toyota prerunner trailertug performed equally well different manufacturer no longer available install lineof sight ws washer blades not interfere road view handy