School me on weld on rock rings

rock rings are just to help protect the bead of the rims. (rim stiffeners) They are not beadlocks. They are usually used with internal beadlocks.

The DIY weld on bead lock kits is what you would want if you want a cheaper alternative for a real beadlock to run low pressure.
 
when installed properly, the internal beadlocks offer a double beadlock... most people would then run a rim stiffener to keep the bead from getting bent up...

you could also run the weld on beadlocks... if you have aluminum wheels you can get an aluminum ring for them, but most people would want a steel outer ring to help resist warping and gouging....
 
well how do the internal ones work?

the tire has an inner tube type device that is inflated to apply pressure to the bead from the inside out, which keeps the bead from being pressed in.

Example

beadlock.jpg
awww.4x4groupbuy.com_store_images_Staun_Internal_Bead_Lock_15_x_9_5_10_Wide.jpg
 
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