# Booster car seats by weight limit for heavier children Which booster car seats have a weight limit that suits a heavier child? Diono Monterey XT 2 in 1 Expandable Booster Car Seat: The Diono Monterey XT is a booster car seat intended for children from 40 to 120 lb\. Fits larger children well: expandable side wings give about 12\.5–14\.5 in of internal width, the seat pan is 14 in deep, and the seat is rated 40–120 lb and 38–63 in\. Britax UpNGo Click: The UpNGo Click is designed for children from 40 to 120 lb and 46 to 63 inches tall\. Cybex Solution T: The store listings give a child weight range of 40 to 120 lbs\. Cybex rates the Solution T for a child 4 years and older, 38 to 60 inches tall and about 40 to 120 lbs\. Diono Monterey 4DXT Latch 2\-in\-1 High Back Booster Car Seat: The specified user\-weight range is 40–120 lb \(18–54 kg\)\. Diono Radian 3RXT: The store lists booster use for children weighing 40–120 lb \(18–54 kg\)\. Maximum listed child height is 57\.1 in \(145 cm\), and the head support has 12 positions\. ### 1. [Diono Monterey XT 2 in 1 Expandable Booster Car Seat](/products/ucp/megababiesusa-com/5521633673369) (sold by megababiesusa\.com) Fits larger children well: expandable side wings give about 12\.5–14\.5 in of internal width, the seat pan is 14 in deep, and the seat is rated 40–120 lb and 38–63 in\. - Weight: The Diono Monterey XT is a booster car seat intended for children from 40 to 120 lb\. (listing) - Height: The store lists a suitable height range of 38 to 63 in\. (listing) - Width: Fits larger children well: expandable side wings give about 12\.5–14\.5 in of internal width, the seat pan is 14 in deep, and the seat is rated 40–120 lb and 38–63 in\. (review) - Service life: - ### 2. [Britax UpNGo Click](/products/ucp/strolleria-com/8008999993418) (sold by strolleria\.com) The UpNGo Click is designed for children from 40 to 120 lb and 46 to 63 inches tall\. - Weight: The UpNGo Click is designed for children from 40 to 120 lb and 46 to 63 inches tall\. (listing) - Height: The UpNGo Click is designed for children from 40 to 120 lb and 46 to 63 inches tall\. (listing) - Width: The seat is 17\.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3\-across fitment in every vehicle\. (listing) - Service life: - ### 3. [Cybex Solution T](/products/ucp/megababiesusa-com/9259909349630) (sold by megababiesusa\.com) Cybex rates the Solution T for a child 4 years and older, 38 to 60 inches tall and about 40 to 120 lbs\. - Weight: The store listings give a child weight range of 40 to 120 lbs\. (listing) - Height: Cybex rates the Solution T for a child 4 years and older, 38 to 60 inches tall and about 40 to 120 lbs\. (guide) - Width: Cybex gives 15\.3 in length, 19\.8 in width and a height range of 24\.6 to 31\.4 in, slightly different from the store's figures\. (guide) - Service life: Cybex describes an eight\-year life span, taking a child up to about twelve years old\. (guide) ### 4. [Diono Monterey 4DXT Latch 2\-in\-1 High Back Booster Car Seat](/products/ucp/anbbaby-com/6830773174358) (sold by anbbaby\.com) The specified user\-weight range is 40–120 lb \(18–54 kg\)\. - Weight: The specified user\-weight range is 40–120 lb \(18–54 kg\)\. (guide) - Height: The review measured a 38–63 in child\-height range, 18\.8 lb high\-back weight and 6\.9 lb backless weight\. The back measured 21\.5–24 in wide; the base measured 18 in with cup holders stored and up to 22 in with both extended\. (review) - Width: The review measured a 38–63 in child\-height range, 18\.8 lb high\-back weight and 6\.9 lb backless weight\. The back measured 21\.5–24 in wide; the base measured 18 in with cup holders stored and up to 22 in with both extended\. (review) - Service life: The store says the seat provides eight years of use\. (guide) ### 5. [Diono Radian 3RXT](/products/ucp/anbbaby-com/6703810314326) (sold by anbbaby\.com) The store lists booster use for children weighing 40–120 lb \(18–54 kg\)\. - Weight: The store lists booster use for children weighing 40–120 lb \(18–54 kg\)\. (guide) - Height: Maximum listed child height is 57\.1 in \(145 cm\), and the head support has 12 positions\. (guide) - Width: Listed dimensions are 28\.5 in high, 17 in wide and 16 in deep \(72\.4 × 43\.2 × 40\.6 cm\)\. (guide) - Service life: - 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 2026-10-25T00:27:04.172Z. 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