Originally Posted by
akcrawler
I have a new machine with 21" tires so I can run tracks and it tops out at about 15-20mph. I am sure I could get another 5-10mph with the bigger tires, but I bought it to cross rough stuff and marshy areas. Most of the time I run in those conditions at around 1/4 throttle. I would like to try some of the larger tires some day, but practical applications for speed are really limited where I ride. I want the larger tires for reduced ground pressure so I can stop using the tracks in the summer, not top speed. I guess the top speed enhancement would be kinda fun for running up an down the dirt road in front of our house...hmmm! At least the rest of the guys gave you some good things to check, but if you have the smaller tires you probably won't get a lot more out of it.