Wow. I didn't really read the specs I guess. I just thought they were bigger but. They do their job, that's a good thing. They take up less space on my trailer wall or any other box you can put them in when the trailer is plugged in or moved. Because they are made of hard rubber, they are lightweight. The rope is long enough even for large tires. When I say "hard" it's not 100% accurate. The bottom of the pad set, which they don't show, is slightly dented, but that doesn't affect performance. I said the rubber is durable and doesn't feel like the hollow plastic pieces I've had in the past.