Flex System Frame + PIPA series adapter by Nuna

Meet the stroller frame that redefines mobility for modern parents. Designed to fit any PIPA series car seat, the SWIV & TRIV bassinet, and the Flex system stroller seat, it’s built with carbon fiber reinforced aluminum for unmatched strength and featherlight handling.

The one-hand fold? Smooth and intuitive. The carry? Effortless. And the look? Sleek, minimal, and engineered for everyday elegance. This Flex system stroller frame offers a more intuitive way to move through every stage, from first newborn outings to spirited toddler adventures.

Details:

• Use
  • Folds easily with 1 hand and stands on its own when folded
  • Folds with ring adapter attached
  • Ultra-lightweight at only 11.3 lbs with adapter attached and easy to tote with carry strap when folded
  • Travel system ready–compatible with any PIPA series car seat using the included folding ring adapter, the SWIV and TRIV series bassinet and the Flex system stroller seat
• Security
  • Quick-engaging 1-touch rear-wheel braking system provides scuff-free security
• Comfort
  • All-wheel suspension and large puncture-proof tires are ready for any terrain
• Premium Details
  • Carbon fiber reinforced aluminum frame offers unparalleled strength and durability while maintaining a remarkably lightweight profile
    Carbon fiber’s unique weave pattern on the frame creates a visually striking effect with a modern aesthetic
  • Large basket holds everything you need for the journey up to 22 lbs
  • Tracking device pocket in the basket keeps tabs on it wherever you go
  • Height-adjustable 3-position pivoting handle for comfortable strolling no matter your height
  • Luxe leatherette accented pushbar and armbar add style to your strolls
  • Go hands-free and store frame away during travel with the included carry bag

Specifications:

• Recommended use: Up to 50 lbs
• Frame Weight: 8.5 lbs
• Frame + Adapter Weight: 11.3 lbs
• Stroller dimensions (open): L 37 x W 21.5 x H 43.5 in
• Stroller dimensions (folded): L 23 x W 21.5 x H 29.3 in

Returns/Exchanges:

• All car seats, strollers, furniture and gear items must be sealed and in original packaging to be eligible for a return or exchange. These products are covered by a manufacturer's warranty.

Instant travel system upgrade — lets your PIPA series infant car seat snap into the Flex stroller frame using the dedicated adapter, so you’re park-to-push in seconds.

Lightweight and compact — the frame with adapter weighs about 11.3 lbs and folds easily while still standing upright when collapsed.

Ready for growth — compatible with the frame’s larger toddler seat up to 50 lbs, meaning the adapter stays useful beyond the infant stage.

Shipping timelines

Orders are processed within 1–5 business days, excluding weekends and national holidays. Orders ship via USPS or UPS based on weight and destination, with ground delivery typically taking 3–7 business days. Tracking is provided, and signatures are required for orders over $200. We recommend using a secure delivery address. Pacifier is not responsible for theft or damage after tracking confirms delivery.

Pre-orders

Pre-order items ship within the timeframe listed on the product page. If the vendor changes the expected availability date, we’ll provide an update. Pre-orders may be canceled at any time before shipment.

Special shipping

Expedited shipping may be available for an additional fee outside of December. Call 612-767-8501 for rush shipping options. Standard shipping is available within the continental U.S.; for Alaska, Hawaii, or APO addresses, please call for availability and a shipping quote.

Contact hours

Our team is available Monday–Friday, 8 AM–4 PM CST, at 612-767-8501. We are closed on New Year’s Day, Easter Sunday, Memorial Day, July 4th, Labor Day, Thanksgiving Day, and Christmas Day.

To request a return, email orders@pacifieronline.com with your name, order number, and the item(s) you’d like to return. We’ll respond within 2 business days with return authorization and shipping instructions for eligible items.

Returns made within 30 days of delivery are refunded to the original form of payment. Gifted items may be returned for store credit or a Pacifier gift card.

Return shipping is not covered by Pacifier and will be deducted from your refund. Return shipping costs vary based on package size and weight.

Items must be new, unused, and in their original packaging with all seals intact. Strollers, car seats, and furniture may only be returned or exchanged if the original packaging remains sealed. Additional return timeframe restrictions may apply to these items.

Clearance items, special orders, and opened gear or furniture are final sale and cannot be returned or exchanged.

Questions? Call us at 612-767-8501.

For the fastest response, call us at 612-767-8501 during the week or use the contact form on this page. Our store team can also be reached at 612-623-8123 Monday–Saturday, 10 AM–6 PM CST, and Sunday, 11 AM–5 PM CST. We are closed on New Year’s Day, Easter Sunday, Memorial Day, July 4th, Labor Day, Thanksgiving Day, and Christmas Day.

Want to submit a new product for our shop?

We welcome new product submissions, especially locally made products. You can contact us using the form on this page, but mailed submissions and samples are more likely to stand out. Please do not stop by without an appointment.

Mail submissions and samples to:

Pacifier
245 2nd Ave N
Minneapolis, MN 55401

If you’d like a sample returned, please include a prepaid return shipping label. Due to the volume of submissions we receive, we’re unable to respond to every inquiry.

Thank you for your interest in Pacifier!