Perform Extended Rear-Facing Car Seat: Fit and Use Questions
By Silver Cross | Published: 2026-11-03
Category: How-to Guides
Get clear answers on fitting and using the Silver Cross Perform Extended Rear-Facing Car Seat, from installation checks to how long your child can stay rear-facing.
Quick answer
The Silver Cross Perform Extended Rear-Facing Car Seat is designed to keep your child rear-facing from birth up to 125 cm (about 7 years) and 21.5 kg, using an integrated ISOFIX base with a support leg. For most families, the key is to install it correctly and keep your child rear-facing for as long as the seat allows.
Why the Swedish Plus Test matters for your choice
The Swedish Plus Test is known as one of the toughest collision tests, focusing on neck forces in rear-facing seats. The Perform carries this approval, which gives you a concrete safety benchmark when comparing extended rear-facing seats. It doesn't mean every installation is automatically safe—correct fitting is still essential.
When a 125 cm limit might not suit your child
The Perform is built for extended rear-facing up to 125 cm, but some children reach that height before age seven. If your child is tall for their age, check the seat's headrest and harness adjustment regularly. The seat is designed for rear-facing only, so if you need a forward-facing option later, you'll need a different seat.
Perform car seat questions answered
- How long can my child stay rear-facing in the Perform?
- The Perform is designed for rear-facing use from birth up to 125 cm or 21.5 kg, whichever comes first. Most children reach this around age seven, but height and weight vary. Keep your child rear-facing until they outgrow the seat's limits. Check your child's height and weight against both limits regularly, not just age.
- What does Swedish Plus Tested mean for this seat?
- It means the seat has passed a Swedish collision test that measures neck forces in rear-facing seats. It's a useful safety marker, but it doesn't replace correct installation and daily checks.
- How do I install the Perform with ISOFIX?
- The Perform uses an integrated ISOFIX base with a support leg. Follow the seat's manual for your vehicle: click the connectors into the ISOFIX anchor points, extend the support leg to the floor, and check that the seat is secure. Many cars have specific ISOFIX positions—consult your vehicle handbook. Always confirm the support leg is firmly on the floor and the seat doesn't move excessively.
- Will the Perform fit my car?
- The Perform requires ISOFIX anchor points and enough space for the support leg. It's a rear-facing seat, so check that your front passenger seat can move forward enough to give your child legroom. If you're unsure, test-fit the seat in your car before buying.
- How do I adjust the harness and headrest as my child grows?
- The harness and headrest should be adjusted so the harness sits at or just below your child's shoulders when rear-facing, and the headrest supports the head properly. Refer to the manual for exact adjustment steps and recheck as your child grows. Recheck the harness height every few months—children grow quickly.
- Can I use the Perform forward-facing?
- No, the Perform is an extended rear-facing seat. It is not designed for forward-facing use. If you need a forward-facing option later, you'll need to switch to a different seat.
Product facts
- Perform Extended Rear-Facing Car Seat Iconic Black: Swedish Plus Tested – approved by the world’s toughest collision test. Gives you an independent safety standard to look for when choosing an extended rear-facing seat.
Perform Extended Rear-Facing Car Seat Iconic Black - Perform Extended Rear-Facing Car Seat Iconic Black: Extended rear-facing from birth to 21.5 kg/125 cm (approx. 7 years). Lets you plan how long your child can stay rear-facing without switching seats early.
- Perform Extended Rear-Facing Car Seat Iconic Black: EasyFit integrated ISOFIX base with support leg. Simplifies installation and adds stability, but you must still check the support leg contacts the floor correctly.
