SM-903QW Adjustable Adult Bicycle Bike Training Wheels Fits 20" to 26" - YouTube
Adjustable Adult Bicycle Bike Training Wheels Fits 22 to 28"" - Walmart.com
Amazon.com: moli dee Training Wheels, Thicken Bike Training Wheels for Adult Under 300lb with Heavy Duty Stainless Steel for 24 26 28 29 inch bike : Sports & Outdoors
Amazon.com : EVO Mobility Multi-Fit Mobility, 20-29", Black : Sports & Outdoors
Swinging Wheels - training wheels for adults and children
Amazon.com : BIKE USA Heavy-Duty Stabilizer Wheels for Adult Bicycles, The Original Training Aid for Full Size Bikes with a 24" to 27" Inch Wheel, Supports over 250 LBS, Patented Design, Black,