NEAT TIMES,there is no truth to the slime in tires exploding,expanding or any of that nonsense....I live in texas and it has been over 103degrees daily or higher that the asphalt gets go hot that is is sticky and if you were to walk more than 10 feet with no shoes on you would be hopping around like a kid in a candy store....I have been riding my bike for 3 1/2 years with the 10.00 thick tubes filled with slime and have never had one blowout......The thick tubes with slime have actually saved me a few times....Lets put this rumor to rest,Unless you have a site with proof to this theory....Hi Mifletz, If Your Heart Is Set On A Friction Drive Get The Kit From "bike Motor Parts", About $160. And The Dax Titan 4 Cycle Engine $175. You Will Have Everything You Need Eccept Gas And Oil For The Crank Case. I Would Get The 1 1/4" Roller And The New 1 1/2" Roller Also. There Is Not Much To Go Wrong. Kevlar Tire Or Tuff Plastic Like Liner. Some Are Having Trouble With Green Slime Exploding The Tire, Especially In The Heat. Let Us Know How You Do. Send Pics If You Can. Ron .![]()