[JEEPIN'75]

What is the difference? which one is better? and how can you tell the difference?

[SirGCal]

Depends what your doing.

Radial is more common today and more used for road tires. They hold their round shape well and are good on-road tires. Good in dry and wet road conditions as well as can be made into a good off-road tire also.

Bias-ply tires are good off-road tires; older technology. They tend to be a little more flexy for grabbing the rocks and such plus resisting punctures and what not well. They also flat-side when sitting over time so in the morning they are often harsh for a few miles until they warm up and round out. Alot of the very-large size tires are bias-ply.

[MSHarnett]

Yeha, what he said. The technical diffrence is the internal belts. The Radials have belts the criss cross I guess you'd say where as the bias just go from side to side.
For off road, in most cases the bias rule, on road, always go with a radial. I've run both, and will never use a bias on road again. Radials tend to last longer too. Oh, and it'll say right on the side if its a radial or not. Most tires are radials, but there are alot of extreme traction tires that are bias, ie, many types of swampers.

I have a set of Interco SS LTBs (33x13.5) for off road only now, and on road I run BFG MT (32x11.5). Two seprate sets of rims makes it easy to swap for trail runs.

[red99tj]

radials are more appropriate for street use, bias ply i would use for trail only