The Helix Plus Upgrade Kit is the double stroller solution for families that already own an Orbit Baby Stroller Frame G2. This kit includes everything you need to transform your Stroller Frame G2 into a full-featured double stroller: a second SmartHub™ ring attachment, large stroller basket, ShadePad™ tablet pocket, and an extendable handlebar. As a double stroller with two SmartHub rings, parents can stroll with all Orbit Baby seats in nearly all combinations (infant car seat, stroller seat, bassinet, and toddler car seat – sold separately), making it perfect for siblings, twins, and growing families. Front-and-back rotating seats mean siblings can interact while strolling, and the swiveling double seat makes it easy to help your child get in and out. With just a couple of clicks, the frame converts on the fly into an uncompromised single stroller. The patented QuadShock™ suspension on all wheels gives the stroller a plush ride, and the narrow frame easily navigates through narrow doors and aisles. The stroller’s compact, nested fold fits in many different trunk spaces, and its smart storage options include a large under-stroller basket, two cupholders, a smartphone slot, and the ShadePad™ tablet pocket. It also features a custom black-finish aerospace-grade aluminum frame, 3-position telescoping handlebar, and hassle-free, no-pump tires. Meets CPSIA [HR4040] and ASTM F833-11 when paired with the Stroller Frame G2. Upgrade Kit attaches to an Orbit Baby Stroller Frame G2 Helix Plus Upgrade Kit with the Stroller Frame G2 works with all Orbit Baby seats in nearly all combinations (infant car seat, stroller seat, bassinet, and toddler car seat – sold separately) Perfect for strolling with twins, growing siblings, or a single child Front-and-back rotating seats means siblings can interact while strolling QuadShock™: patent-pending 6-wheel stroller suspension gives a plush ride with hassle-free, no-pump tires Narrow maneuverable frame easily navigates through doors and aisles Convert from double to an uncompromised single stroller in just a couple of clicks Smart storage: large under-stroller basket, two cupholders, smartphone slot, and ShadePad™ tablet pocket The do-it-all ShadePad™ for your handlebar: shade your child, check your tablet computer, and stow your wallet Compact fold that nests with the Stroller Frame G2 to fit in many different trunk spaces Tires made of lightweight and responsive EVA, also used in the midsoles of performance running shoes Custom black-finish aerospace-grade aluminum frame optimizes strength while staying light weight Handlebar rotation and height adjustment fits all sizes of parents Safety Meets CPSIA [HR4040] and ASTM F833-11 Stroller frame made with aerospace-grade aluminum Specifications only attaches to the Orbit Baby Stroller Frame G2 Works with any combination of Orbit Baby seats in either position, except for toddler car seat and generation-one toddler stroller seat in rear SmartHub position Also available: Double Helix Stroller Frame (MSRP $750), which includes full double stroller frame and all additional pieces included in the Helix Plus Upgrade Kit Weight/Height Rating: see individual Orbit Baby seat's weight rating; height limit for child in rear SmartHub position is seat height rating or 34” (86cm), whichever is shorter Product Dimensions Helix handlebar heights: 35 – 45 in (89 – 114 cm) width when installed on Stroller Frame G2 (unfolded): 24 in (61 cm when installed on Stroller Frame G2 (folded): 32L x 19W x 15.5H in (81L x 48W x 39H cm) Product Weights: Helix Plus installed on Stroller Frame G2 (double mode): 26 lbs (11.8 kg)