hi, i'm a beginner with a heavy comfort bike (95 lbs) that's got these Pee Wee Herman fat tires on 26.7" wheels. the thread grooves are very shallow and offers hardly much traction over dirt and sand.
i only ride on the sidewalks and trails, but almost took a bad spill a few times going over some patches of sand....while going completely straight.
is it ok to get some mountain bike tires for the front only?
i swapped the front tires once with an older mountain bike and it seemed ok. i went into a horse trail at the park by accident and it was pretty decent going over all dirt, rocks and gravel.