The main point to consider when you want to make a good choice in your off road tires is to consider what kind of terrain you’re going to be riding over, which will make a huge difference to you when you make the tire selection.
For Muddy Terrain
If you envision mud being an issue on your trail, and you see no way clear to avoid it, then you’re going to want to use narrow tires which have lugs that are spaced quite widely so that you don’t end up having your frame and forks covered in mud. The buildup can create havoc with your speed and with your stability.
For Softer Terrain
When the conditions are such that you’re going to be riding over softer areas, things such as rocks that are loose, soft dirt and etc, the best bet for you will be to pick a wide tire with broad knobs.
These will give you a great deal more stability and help you to keep traction and that the tread be thick and stable, to give you a firm base of support.
For Hardpacked Terrain
When your surface is going to be hard packed, then you’re going to want tires that have very close spacing between the hard knobs, and it may be that you don’t want any center knob whatsoever.
The hard packed surface will accept a narrower tire than you might use when conditions see you riding a soft surface, and you want to make sure that your knob is two times the width at the base at it is high.
If the knob is too tall, your tire’s going to deflect when you’re cornering.
