I have a single speed bike with a flip-flop hub and recently I decided to try out the fixed side. When testing it out in the car-park I was applying backpressure to brake and found sometimes the mechanism slipping. I tried and recreated it a few times but I could not tell whether it was something in the machine slipping or just the tire slipping on the ground.
Is it normal for the tire to slip on the ground a little bit? All I did was to loosen the bolts, flip the wheel over and swap chain, and tighten up the bolts again. Is there any way it's possible to do the conversion 'wrong' or have slipping in the crank/hub? I don't want to ride the bike on the road like this if it could be unsafe.