{"pageUrl":"https://www.comparethespecs.com/kids-family/car-seats/what-are-the-most-compact-3-in-1-car-seats-with-booster-mode-for-small-cars","lastUpdated":"2026-09-13","totalProducts":3,"niche":"What are the most compact 3-in-1 car seats with booster mode for small cars?","description":"What are the most compact 3-in-1 car seats with booster mode for small cars?","products":[{"brand":"Chicco","model":"Fit3x ClearTex All-in-One Car Seat","price_gbp":169.88,"origin_country":null,"specs":{"weight":"21.0","seat_width":"16.7 in","height_limit":"57 in","weight_limit":"100 lbs","harness_system":"12-position no-rethread harness","booster_backrest_height":"20 in"},"confidence_score":null,"sources":[{"label":"Target","url":"https://www.target.com/p/chicco-fit3x-cleartex-ultra-slim-all-in-one-car-seat-black/-/A-94803559","currency":"USD","source_country":"US","price":229.99,"price_gbp":169.88,"scraped_at":"2026-09-08T19:43:40.642306"},{"label":"Chicco","url":"https://www.chiccousa.com/shop-our-products/car-seats/all-in-one/fit3x-cleartex-ultra-slim-all-in-one-car-seat/87179.html","currency":"USD","source_country":"US","price":229.99,"price_gbp":169.88,"scraped_at":"2026-09-08T19:43:40.642306"},{"label":"Instacart","url":"https://www.instacart.com/products/110752010-chicco-fit3x-cleartex-ultra-slim-all-in-one-car-seat-oat-1-each","currency":"USD","source_country":"US","price":261.99,"price_gbp":193.51,"scraped_at":"2026-09-08T19:43:40.642306"}],"summary":"The Chicco Fit3x ClearTex is a slim all-in-one car seat measuring 16.7 in wide and weighing 21 lbs. It supports rear-facing, forward-facing, and high-back booster use for children from 5 to 100 lbs, with ClearTex fabric, six recline positions, and fold-in CupFolders.","ideal_for":"It suits small cars because its 16.7 in ultra-slim width is designed for three-across seating, while its high-back booster mode accommodates children 40-100 lbs and 44-57 in tall."},{"brand":"Diono","model":"Radian 3RXT SafePlus 3-in-1 Convertible Car Seat","price_gbp":258.51,"origin_country":null,"specs":{"weight":"30.6","seat_width":"17","height_limit":"57.1","weight_limit":"120","harness_system":"5-point harness"},"confidence_score":null,"sources":[{"label":"Raddl","url":"https://www.shopraddl.com/shop/babies-kids/car-seats/convertible-car-seats/radian-3rxt-safeplus-4-in-1-convertible-car-seat-copy/","currency":"USD","source_country":"US","price":349.99,"price_gbp":258.51,"scraped_at":"2026-09-08T19:43:40.642306"}],"summary":"The Diono Radian 3RXT SafePlus is an all-in-one car seat that supports rear-facing, forward-facing harness, and high-back booster use from 4 to 120 lb. Its 17 in slim-fit design is made for fitting three car seats across, while SafePlus side-impact protection, an anti-rebound bar, and a 12-position headrest support growing children.","ideal_for":"It suits small cars because its 17 in slim-fit width is designed for three-across installation, while its 4-120 lb range and high-back booster mode allow one seat to serve from infancy through the booster years."},{"brand":"Graco","model":"True3Fit LX 3-in-1 Car Seat","price_gbp":206.08,"origin_country":null,"specs":{"seat_width":"16.5","height_limit":"49 or less; 43-57 in booster mode","weight_limit":"5-40 rear-facing; 26.5-65 forward-facing; 40-100 booster","harness_system":"No-rethread 5-point harness"},"confidence_score":null,"sources":[{"label":"CarSeatSite","url":"https://carseatsite.com/true3fitlx/","currency":"USD","source_country":"US","price":279.0,"price_gbp":206.08,"scraped_at":"2026-09-08T19:43:40.642306"}],"summary":"The Graco True3Fit LX is a 3-in-1 seat that supports rear-facing, forward-facing, and highback booster use. It has a slim 16.5-inch width, a forward-facing belt lock-off, an anti-rebound bar, and a no-rethread harness, making it suitable for growing children and three-across installations.","ideal_for":"Its 16.5-inch width and highback booster mode from 40-100 lb make it a strong option for small cars and families needing a compact 3-in-1 seat."}]}