The C-Tug Sidewinder Wheels are designed to double the footprint of the C-Tug Cart's Kiwi puncture-free wheel, giving greater weight distribution and reducing the chance of the C-Tug Cart becoming "bogged down" in really soft sand or mud. The robust design of the Sidewinder means once it is fitted, it can't be removed. An extra set of C-Tug Kiwi Wheels can be purchased separately if you need to use the trolley without the C-Tug Sidewinder Wheels. This product has been discontinued.
I got these (in addition to the Kiwi Wheels) because I got tired of my cart getting stuck in soft sand at launch & recovery. I also got tired of air leaks with my original tires. The combination of these inserts and the plastic wheels allow the cart to be pulled over soft sand LIKE A BOSS! It is a huge improvement over the original C-tug wheels with the pneumatic tires...which were prone to air leaks. The "footprint" is much wider with these, allowing the weight to be distributed over a larger surface area. The product works exactly as designed. My only gripe is the total cost. I basically added $100 in addition to the price of the original C-tug cart to make it fully functional for my needs. It would be great if they...ya know...made it this way in the first place. Luckily, I used a gift card to pay for these upgrades.
These sidewinder add ons are a waste of money if you are trying to tote your kayak on soft beach sand . . . Save your money and go w/ a product that has the wheeleez tires or the hobie beachtrax 2. I wish I had never wasted money on this.
Junk this company just makes thing that cost money not thing that really work. These are sand catchers and they will grind up you axles as well, you may as well just drag your kayak across the sand. I like the c-tug but the add on just don't get it done...