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Yes, there is a difference between front chainrings for derailleur equipped bikes compared to bikes without a derailleur. Basically a derailleur suitable chainring "wants" to fall off. It's designed so that the chain is happy to climb onto the gear and also fall off the gear. There are various ramps for the chain to engage into. Non-derailleur chainrings ...

It is absolutely possible to skid the back wheel, but you really need to be deliberate about it to do it. In this case, however, it sounds like you were applying back pressure to slow down and noticed something surprising, so it was not likely to be the tire skidding. It was probably the cog slightly loosening. If you're going to apply any back-pressure at ...

The fixed gear mechanism is very simple - the cog is wound onto its thread so that when you pedal forward you are tightening the screw (as well as moving the bike forward). The opposite is also true, when you apply backward pressure, you're not just stopping, you're trying to loosen the screw. Most often you won't budge the cog, but it is possible that a ...

Although this has been answered I thought I'd chuck another suggestion in there. As Mac said there is a difference between chainrings meant for deraileurs and those meant for single-speeds. That's not to say you can't use the former without a deraileur, but as it is easier to derail the chain you should check your chainline is well set up. If your front ring ...

I had a similar problem on my mountain bike. My bike is a 2008 Giant trance x2. It would "ghost shift" under load usually going uphill. It would even miss shift locking the back wheel. Very frustrating. I took it to my local bike shop and they did some adjustments and replace the chain. Resulting in a little improvement but still basically unrideable. I ...