Newb question.....Leaf spring car.

[Dragoon55]

So how old is to old 5 or 6 years,

Wouldnt want to give a specific number, but I know lots of guys still running cars from the late 90's and winning and nobody has experienced any kind of failure due to tube sweat. Now most all of these cars are 2 x 2 SQR rail cars. Now with some of these newer, flimsy 1-3/4 "Crash & Trash" cars they may not go as long. I myself would never run anything less than 2" RND, preferably 2 x 2 SQR. JMO