Let me tell you what was wrong because that's more helpful. The operational manual is very poor. It's anything but obvious that the front axle is tightened using an allen key - this doesn't accord with the video and you have to examine the axle very carefully to spot the allen key hex. The stays on the front mudguard were marginally too short and it took a lot of fiddling to stop it rubbing on the wheel. The rear light can be installed upside down easily an so the mudguard rattles against it on bumpy roads. maybe a sticker saying 'top'. All minor stuff apart from the instruction manual, which really is dire. Overall very happy with the bike. Your technical support guys are absolutely brilliant and it's been a rare delight not having to wait on the phone before talking to them