Now that I have upgrade my tires I'd like to get my speedometer corrected for the larger size. I think there are some simple devices, such as JScan, that can be used to just correct the speedometer. However, I'm thinking of spending a few extra $ to gain more control/access of the system with a product such as Tazer. I would welcome any thoughts on what devices are available and what the folks on this forum might recommend. Thanks in advance.