There more durable than the plastic ones. There's no rebuild kits available that I know of for redcat shocks, but you might be able to find some O rings at the LHS or at a Local hardware store. But ya need to get some shock oil. If yoru tires are that flat you might want to consider thinking about new tires soon, or just do like I do and run them till they RIP right off the tire, WOO WHOOOO [sm=lol.gif] fun wow, that's the best when rubber flies 30 feet in the air in all directions. Matter of fact it's fun when any thing flies off my car means I must of been having fun at some point.