1. Product Overview
The Baby Trend Infant and Toddler Double Stroller & Car Seat Combo is a versatile 3-in-1 travel system designed to accommodate two children from infancy through toddlerhood. This system includes a double stroller and an infant car seat, providing a complete solution for families with multiple young children. It offers various seating configurations to adapt to your family's needs.


2. Setup and Assembly
Before first use, ensure all components are present and undamaged. Assembly is minimal, primarily involving attaching wheels and trays, and familiarizing yourself with the car seat base installation.
2.1 Stroller Assembly
- Unfold the stroller frame by releasing the folding latch and pulling the handle upwards until it locks into place.
- Attach the front and rear wheels by pushing them onto their respective axles until they click securely.
- Install the child trays by aligning them with the slots on the stroller frame and pushing down until they lock.
- Ensure all locking mechanisms are engaged before placing children in the stroller.
2.2 Car Seat Base Installation
Refer to your vehicle's owner's manual for specific car seat installation instructions and locations. The Ally 35 Infant Car Seat base features a 4-position push-button height adjustable base with dual bubble level indicators for proper angle adjustment.
- Place the car seat base on the vehicle seat.
- Adjust the recline angle using the push-button mechanism until the bubble level indicator shows the correct position for your infant's weight.
- Secure the base using either the vehicle's LATCH system or the seat belt, ensuring it is tightly installed with minimal movement (less than 1 inch side-to-side or front-to-back at the belt path).
- Once the base is secure, the infant car seat can be clicked into place on the base.

3. Operating Instructions
This section details how to use your double stroller and car seat combo in various configurations and for daily activities.
3.1 Stroller Configurations
The Sit N' Stand Double Stroller offers multiple configurations to suit your children's ages and preferences:
- Front Car Seat & Rear Car Seat: Both seating positions can accommodate an infant car seat.
- Front Car Seat & Rear Seat: An infant car seat in the front, with a toddler in the rear seat.
- Front Seat & Rear Car Seat: A toddler in the front seat, with an infant car seat in the rear position.
- Front Seat & Rear Seat: Both positions used as standard stroller seats for toddlers.
- Rear Seat & Rear Stand on Platform: The rear seat can be removed to allow an older child to stand on the integrated platform.





3.2 Harness System
Both the stroller seats and the car seat are equipped with a 5-point safety harness. Ensure the harness is properly adjusted and snug against your child's body, with the chest clip at armpit level. The car seat features a simple one-hand adjustment and push-button release for convenience.

3.3 Folding the Stroller
The stroller features an easy-fold mechanism for convenient transport and storage. Locate the folding triggers, typically on the handle or side of the frame, and follow the instructions to collapse the stroller. Ensure all children are removed from the stroller before folding.

4. Maintenance and Care
Regular maintenance ensures the longevity and safety of your Baby Trend travel system.
- Cleaning: Spot or wipe clean fabric components with mild soap and water. Do not use bleach. Allow to air dry completely.
- Frame Care: Wipe the plastic and metal parts with a soft, damp cloth. Avoid abrasive cleaners.
- Wheels: Periodically check wheels for debris and ensure they spin freely. Lubricate axles if necessary.
- Storage: Store the stroller and car seat in a dry, cool place away from direct sunlight to prevent material degradation.
4.1 Car Seat Boot Cover and Canopy
The Ally 35 Infant Car Seat includes a cold weather boot cover for extra warmth and an adjustable 2-panel canopy for sun protection. These can be removed for cleaning or adjusted as needed.


5. Troubleshooting
This section addresses common issues you might encounter with your Baby Trend travel system.
- Stroller difficult to fold/unfold: Ensure all seats are upright and child trays are removed. Check for any obstructions in the folding mechanism. Apply a small amount of silicone lubricant to moving parts if stiffness persists.
- Wheels squeak or stick: Clean any dirt or debris from the wheel axles. Apply a silicone-based lubricant to the axles.
- Car seat not clicking into base/stroller: Ensure the car seat is correctly aligned with the base/stroller attachment points. Push down firmly until you hear a click. Check for any obstructions in the locking mechanism.
- Harness difficult to adjust: Ensure the harness straps are not twisted. Refer to the manual for specific harness adjustment instructions, as some models require pressing a button while pulling the straps.
- Stroller pulls to one side: Check tire pressure (if applicable) and ensure wheels are free of debris. Verify that the stroller is not overloaded or unevenly weighted.
6. Specifications
Detailed technical specifications for the Baby Trend Infant and Toddler Double Stroller & Car Seat Combo.
| Feature | Specification |
|---|---|
| Model Number | CS79B51A |
| Color | Stormy |
| Material | Plastic (Frame), Polyester (Fabric) |
| Stroller Seating Capacity | 2 Children |
| Stroller Max Weight Recommendation | 40 lbs per seat |
| Car Seat Age Range (Description) | 0-12 Months |
| Car Seat Weight Capacity Maximum | 35 lbs |
| Stroller Dimensions (L x W x H) | 49"L x 22"W x 43"H |
| Car Seat Dimensions (L x W x H) | 27"L x 18.5"W x 25"H |
| Stroller Folded Size | 5" x 15.1" x 12.6" (Note: This seems to be a compact folded size, actual dimensions may vary slightly) |
| Harness Type | 5 Point |
| Number of Wheels | 4 |
| Included Components | 1 Infant and Toddler Sit N Stand Double Twin Stroller, 1 Car Seat, and 1 convenient parent organizer |


7. Warranty and Support
Baby Trend products are designed for quality and durability. For any questions or assistance, please refer to the information below.
7.1 Manufacturer's Warranty
This product comes with a 6 Month Limited Warranty from the manufacturer, Baby Trend. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
7.2 Customer Support
For product support, troubleshooting assistance, or to inquire about replacement parts, please contact Baby Trend Customer Service. Contact information can typically be found on the Baby Trend official website or on the product packaging.
You can also visit the official Baby Trend store on Amazon for more information and product details: Baby Trend Store