I purchased a 2015 GL1800 with a Roadsmith conversion from Honda of Russellville in June of this year. On my initial lengthy trip to Colorado in July, I noticed the speedometer and odometer is off about 10%. Is this typical of the tires used on Roadsmith conversions, and can this be corrected with a calibration, or do I need to add some device to correct the problem? Also, since I live in the Houston, TX area, is there a Roadsmith dealer or representative in the area? Thanks