Dimensions:

• Length: 30 feet 11 inches (9.4 meters)
• Width: 8 feet (2.4 meters)
• Height: 11 feet 1 inch (3.4 meters)
• Interior Height: 6 feet 10 inches (2.1 meters)

Weight and Capacities:

• Dry Weight: 6,750 pounds (3,062 kilograms)
• Payload Capacity: 1,880 pounds (852 kilograms)
• Hitch Weight: 780 pounds (354 kilograms)
• Gross Vehicle Weight Rating (GVWR): 8,630 pounds (3,915 kilograms)
• Fresh Water Capacity: 52 gallons (197 liters)
• Gray Water Capacity: 69 gallons (261 liters)
• Black Water Capacity: 30 gallons (113 liters)

Sleeping Capacity: The 2018 Keystone Springdale Summerland 2660RL can sleep up to 6 people comfortably.

Construction:

• Steel I-beam frame
• Aluminum exterior skin
• Wood frame construction

Interior Features:

• Front master bedroom with a queen-sized bed and wardrobes
• Rear living area with a sofa and convertible dinette
• LED TV with entertainment center
• AM/FM/CD/DVD stereo system
• Air conditioning and heating system

Kitchen:

• Three-burner range with oven
• Microwave
• Double-door refrigerator
• Sink with high-rise faucet
• Solid surface countertops

Bathroom:

• Shower with glass door
• Foot-flush toilet
• Vanity sink with mirrored medicine cabinet

Exterior Features:

• Power awning
• Outdoor speakers
• Pass-through storage compartment
• Stabilizer jacks
• Exterior shower

Please note that these specifications are based on general information available for the 2018 Keystone Springdale Summerland 2660RL. It's always recommended to refer to the manufacturer's official documentation or contact a Keystone dealer for the most accurate and up-to-date information.