I ordered Maxxis M7305 IT 110/100x18 rear tire for $60.00. Is that a good all-around tire? Is it hard to get the old tire off and put the new tire on? I wonder if I should get new sprockets and chain! The chain and sprockets have about 1000 miles on them. The cheapest set is RK sprocket sprocket and chain kit which is $140 but the gearing is 14/50 for faster acceleration. Stock is 14/49. Should I buy this kit?