Doesn't have to be registered in CA. Roller is like bowling ball material - more easy on the tire than the metal roller. Start by pedalling (starts at 5mph) - you can disengage by pulling clutch and pressing button. Kill switch on the handlebar. Thumb shift speed control. It's pretty quiet - has a muffler. Aluminim bracketing - no rust. US Engines motor. Will slip when wet, but shouldn't damage if you disengage motor reasonably fast. 20 mph per tank, tank is pint and a half. 32x1 ratio, little more oil during break-in period. Weight: 9.5lb. Well centered - when disengaged can even ride with no hands
