Car seats compared by rear-facing and harness weight limits
Which car seat has the highest weight limit for rear-facing and harness use?
Britax One4Life ClickTight: Rear-facing use is for children weighing 5 to 50 lb. Overall range: Britax states it grows with a child from 5 to 120 lb and up to 63 in tall. Cybex Callisto G 360: The store says the seat supports 4 to 65 lb in harness mode and up to 120 lb as a booster. Overall range: The maker says the seat is for newborns up to about 10 years, from 4 lb to 120 lb, with a maximum child height of 57 in, in the all-in-one convertible group.
| Product | Why | Rear-facing limit | Harness limit | Overall range |
|---|---|---|---|---|
| 1. Britax One4Life ClickTight sold by lovemedobaby.com | Rear-facing use is for children weighing 5 to 50 lb. | Rear-facing use is for children weighing 5 to 50 lb. manual | - | Britax states it grows with a child from 5 to 120 lb and up to 63 in tall. listing |
| 2. Cybex Callisto G 360 sold by lovemedobaby.com | The store says the seat supports 4 to 65 lb in harness mode and up to 120 lb as a booster. | - | The store says the seat supports 4 to 65 lb in harness mode and up to 120 lb as a booster. listing | The maker says the seat is for newborns up to about 10 years, from 4 lb to 120 lb, with a maximum child height of 57 in, in the all-in-one convertible group. guide |
Every value in the table is a fact RoboTrunk checked, linked to the page it came from. A dash means no checked fact fills that cell. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live.
Written 2026-10-26T21:23:15.599Z.
This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words.