Back in the 60's and 70's safety skids were quite popular. Seide was the best known one. I believe yours is one of the other brands.
Purpose was to hit the pavement before a flat was totally down on the rim..
When you see the shower of sparks coming from under the trailer it is a good indication you have a flat.
Rick Davis 1602 K8DOC
61 tradewind, plus a few others
13 Ram 2500 TD
99 Dodge TD 577K miles
What RickDavis stated. And exclusively on single axle trailers for obvious reasons.
1966 Mercury Park Lane 4 DR Breezeway 410 4V, C-6, 2.80 - Streamless.
1966 Lincoln 4 door Convertible 462 4V 1971 Ford LTD Convertible 429 4V Phoenix ~ Yeah it's hot however it's a dry heat!