Re: Drive Roller: Noob Help
My first motorized bicycle was friction and I built several DIY and I can tell you what Elmo says is true. Also note that plastic and wood rollers do not last at all if you plan on putting thousands of miles on like I did. Also note that JB weld and epoxy do not work for mechanical assemblies like we deal with here.
The best roller is made from a 2" piece of 1 1/4" OD iron pipe with wood cylinder wedged inside. $2 a foot and lasts for years.