Cybex Sirona M vs UPPAbaby Knox
The Knox rear-faces up to 45 lb, versus 40 lb.
UPPAbaby KnoxList price not published
Only the differences are shown.
| Cybex Sirona M | UPPAbaby Knox | |
|---|---|---|
| Type | Convertible | Convertible |
| Rear-facing weight | 5–40 lb | 14–45 lbHighest rear-facing limit |
| Rear-facing height | Not listed | Up to 49 in |
| Forward-facing weight | 22–65 lb | 25–65 lb |
| Forward-facing height | Up to 49 in | Up to 49 in |
| Seat weight | 24.7 lb | Not listed |
| Width | 20 in | Not listed |
| Head rule | Rear-facing: When top of head is at least 1 in. (2.5 cm) below the top of the Headrest. Forward-facing: When top of ears are below the top of the Headrest. | DO NOT use this Child Restraint system if the top of the child’s head is less than 1” from the top of the headrest when in its highest position. |
| Newborn insert | Newborn Insert, 5 lbs-11 lbs per manual chart; product page: 'The removable newborn insert provides support for babies from 5 lbs. to 11 lbs.' | Fit Inlay, 'designed for children who weigh 14–25 lbs (6.4–11.3 kg)'; 'Remove the Fit Inlay at 25 lbs (11.3 kg) or when the child begins' growing on top of the buckle |
| Installation | LATCH rear-facing, seat belt rear-facing (lap/shoulder), lap belt rear-facing, LATCH forward-facing + top tether, seat belt forward-facing + top tether, lap belt forward-facing + top tether | seat belt rear-facing (lap/shoulder), lap belt rear-facing, LATCH rear-facing, rear-facing tether (Multi-Directional Tether), seat belt forward-facing + top tether, lap belt forward-facing + top tether, LATCH forward-facing + top tether |
| Load leg | No | No |
| Anti-rebound bar | Not listed | No |
| Rotates | No | No |
| Harness heights | 12 | Not listed |
| Recline positions | 10 | 4 |
| Aircraft label | Certified for aircraft, per the maker | Certified for aircraft, per the maker |
| Expires after | 8 years | 10 years |
Ask the meadow
Sirona M or Knox?
Answers come from each maker's published specs. Safety and health questions link to the agency or medical source.
Which is easier to travel with?
Sirona M: certified for planes, 24.7 lb. Knox: certified for planes.
Still wondering? Write to us at hello@cribpicks.com and we'll look it up.