Is it true because of the tranny computer is set for 25"s; that moving to a larger tire size will cause lots of problems over all? My dealer is telling me so stay will the original size tires, any thoughts?
I have 26x12's in the back and 26x10's in front... I did lose a small amount of power, but gained some serious handling... I can still do low 60's on my GPS.... I would recomend to anyone to go up to 26's..... Im not sure about 26x12's on all the corners, unless you go mudding 90 percent of the time.... But 26's is the way to go....
I have 26" 589's on my Rincon and like them pretty well. The fronts are 9's and the rears are 12's. I wouldn't go with any wider tire upfront unless I rode nothing but mud. I don't do much mudding, but I do ride in a lot of snow and the 589's are great.
Currently running 26x10x12 frt and 26x12x12 rear and love the change it made in the bike ..........But, if I had to do it over again I wuld have gone with 26x10x12 at all 4 corners. The wide tires on the rear make it harder on tighter trails and sling a little more mud at ya. Since it is a sport utility quad, all 4 the same size make it look more to the sporty side than utility.
Your dealer is talking BS about the "tranny computer" being messed up by non-stock tire sizes. The only effect will be that the speedo will read slower than you are actually doing because it calculates the speed based on the speed of rotation of the output shaft from the gearbox based on having 25" tires. With 26" tires you travel 3.14" further with every rotation of the wheel than you would with 25" tires, therefore for the same rotation speed of the output shaft you will travel further (faster) on 26"ers. In practice, when the speedo reads 60mph you would actually be doing 62.4mph with 26" wheels fitted.
Also, the engine will produce no less power, but you will lose some acceleration as a 26" wheel requires 4% more effort to rotate it than a 25" wheel.
The long and the short of it is a slight drop in acceleration and a small increase in top speed - but the differences is very small. The biggest differences will be in ground clearance and handling !