Sorry for the long delay. I should be checking request & such. Been riding, alot.
The kenda sizes on my X are as follows: Front 4.60 @ 17", Rear 5.10 @ 17".
I curently have over 2,500 miles on these tires & they are not half worn out on the back & maybe only a quarter worn on the front. Grip on & off pavement is very good. We have a lot of sand & mud here in Florida.
I'm very pleased w/ these tires & paid less than 100USD delievered to my office.
I use very thick tubes w/ 8 to 10 oz of Ride-On in each tube. W/ Ride-On there is an on going balance factor & because the tubes can be used again, it is a real savings.
Hope this helps anyone interested in the Kenda 270s.