Greetings, Recently my 2015 John Deere 825i's electronic speedometer would not register over 15 MPH even though I knew I was going much faster. I ended up taking it into my dealer to have them trouble shoot and repair it. My dealer checked their D-TAC for a solution. They found a D-TAC solution 98282 listed for the problem. They reprogrammed my Gator's computer with it's tire size and corrected the problem. My Gator has OEM stock tires that have never been changed. The tires are in like new condition. The service tech said John Deere is aware of the problem but because my Gator is out of warranty I was changed $47.83 Labor, $2.00 Misc, and $4.08 sales tax Total: $53.91. I'm sharing this so if other owners have the same problem, this may be the fix for yours. My 825i has otherwise been an excellent UTV and it's used daily around our property.