• The original Riser Ring is new and improved
• Thicker walls and rounded radiuses create a more stable platform
• Rings are now stackable for easier storage and merchandising
• With four available heights, the riser ring is designed to meet the needs of riders who want a level bike when they train or riders who want to simulate riding uphill on their trainer and fine tune their position
• Adjustable heights are as follows: (.5", 1", 1.5", 2"). Fits tires up to 2.25"
• PVC construction for a lifetime of use