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I've had mine to the 120 mark indicated. Not sure what the error ratio might be as speed increases but when Tom, Wendy , and I all went to the PA grand canyon Tom got me looking at those road side radar things and between 60 and 80 mph my speedo is dead on by the speed indicated on those.




Theres definately something wierd going on between my bike with a larger front tire and the stock tires too. Remember when wendys milage on the trip meter was like 5 miles different from mine?

But yeah I pass a speed checkpoint everyday due to the roadwork happening on my route and its always dead on. ranging from around 30mph to 70/80ish. Ive thought about the possibility that its reading other cars around me, but I happened to be on the road by myself a couple times and got clocked at the same speeds.