Easy to install. Maximum weight limit of 50 lbs. To teach balance, training wheels are designed to be 1/8-1/4 inch off the ground on either side when properly installed. Fits most bikes. For 20" bikes, these training wheels are designed to provide balance support and will not completely stabilize the bike while pedaling. When properly installed, these training wheels are designed to be approximately 1/2" off the ground on either side. Best for bikes with 12" to 18" wheels. Wheels flip down when needed, flip up when not in use.

Vehicle Service Type: Bicycle. Item Diameter: 12 Inches. Item Weight: 2.42 Pounds. Rim Size: 20 Inches. Material: Other. Brand: BELL. Size: One Size. Date First Available: October 2, 2016. Best Sellers Rank: #31,248 in Sports & Outdoors. Customer Reviews: 4.2 out of 5 stars 1,847 ratings 4.2 out of 5 stars. : B01LZCUTPX. Size: ?One Size. Included Components: ?2 Bike Training Wheels. Style: ?Spotter 500. Part Number: ?7072772. Manufacturer: ?Bell Sports. Suggested Users: ?Unisex. Material: ?Other. Model Name: ?Bell Spotter 500 Flip Up Training Wheels. Brand Name: ?BELL. Item Weight: ?2.42 Pounds. Item Dimensions LxWxH: ?9.44 x 7.78 x 8.26 inches. Package Weight: ?1.11 Kilograms. Item Package Dimensions L x W x H: ?13.54 x 6.73 x 2.83 inches.