but 4 5" wheels for the most balance and smooth ride

It's got a foam base

Fixed Adjustable Non-Slip Shoulder Strap

all carried comfortably thanks to the adjustable shoulder strap

This is for the extra add on bag that attached to your double/triple roller

Ebonite Impact Plus Single Tote Black Bowling Bag bowling balls but 4 5" wheels forSingle ball bag Adjustable, removable shoulder strap with non slip pad Welded steel hardware Upright storage protects shoes Zippered front accessory pocket Separate side shoe compartments hold up to size 15 shoes Removable polyurethane foam ball cup Padded carrying handles Dimensions: 15" W x 9" D x 14" H 2 year limited warranty