24 x 1 3/8 in. (37-540) Schwalbe HS440 Marathon Plus Evolution Wheelchair Tire

• Features Smartguard™, a puncture resistant material behind the tread designed to help prevent flats without making the ride harsh
  
• Schwalbe's Black'n' Roll™ compound, these tires leave no unsightly black marks on indoor floors (the black tread models - Gray model does not have this)
• 2Grip™ smooth sidewalls allow the tire to glide silkily past the hands for a hand-friendly experience
  
• Max 85 PSI
• Choose to add a standard inner tube, thorn resitant inner tube, or a solid urethane insert when ordering and save!
• Sold individually (each). For a pair, order quantity 2

	Smartguard™ is a solid, 5 mm thick layer of highly flexible special rubber under the tread (shown in blue) which provides effective protection against pinch flats, embedded objects, even small thumbtacks. The Marathon Plus Evolution Wheelchair Tire with SmartGuard™ combines the comfort and light running of a pneumatic tire with the puncture protection of a urethane tire.
	Wheelchairs with black tires? Schwalbe has made it possible. We developed a special Black’n Roll compound that does not leave unsightly marks on indoor floors (black tread models only).
	Excellent quality for intensive use. These are the best value for money tires.

24 x 1 3/8 in. (37-540) Schwalbe HS440 Marathon Plus Evolution Wheelchair Tire Purchase Notes
This is a pneumatic tire and requires an inner tube. Choose to add an inner tube with a schrader valve when ordering (a schrader valve is the standard bicycle / car tire type valve). You can choose from a standard or thorn resistant inner tube (thorn resistant inner tubes are made from a much thicker material helping to reduce flat tires caused by a variety of objects such as stones, glass, doorway thresholds, etc). It is best practice to replace the inner tube when replacing a tire since inner tubes can exhibit wear and fatigue especially at the seams with prolonged use. You can also replace the air filled inner tube with a solid urethane insert which turns this Schwalbe Marathon Plus model into a completely flat free tire (the solid insert is re-usable).