Kayak carts

From KayakWiki

On a road or hard surface, a cart can be used. Some of the smaller carts can fold up and be stored inside the kayak. The wheels are typically held on with clevis pins so they can easily be removed to flatten the cart.

The most common are small carts that fits under the kayak.

Here's an unusual solution: A set of wheels as part of the kayak.

http://www.splashdance.com/small_cart.jpg

http://www.qsl.net/ws8g/kaywheels.jpg