Just to play devils advocate here and to put a BC lens on it. The biggest buzz word in land use planning right now is Accessibly. Now that can be taken to mean many things, but one of the main barriers to entry is cost. especially among low income families. I realize this is deeeeep in the comments about a $12000 ebike. Mountain bike trails have always been open to all non motorized users as no charge. if you want to gain advocates, get the hikers, dog walkers and trail runners on you side. they out number ebikers by several orders of magnitude.
Historically trails were volunteer built and maintenance. That is not as true these days as it was, but still most trail development comes from provincial funding in one form or another. To take infrastructure which has either been developed by volunteers or by tax dollars and to add a user fee to it is problematic when viewed in terms of accessibility.
again just playing devils advocate.