Diono Radian r100 Combination Booster Seat

Calculated at Checkout

You’ll only ever need one car seat: this car seat! Allowing a child from 5 pounds to 100 pounds, this lifespan seems too good to be true! The Radian r100 is a fantastic car seat option. It has a rear-facing weight capacity of 5-40 pounds, a forward-facing weight capacity of 20-65 pounds, and its booster seat capacity is 50-100 pounds. Other fantastic features include its rear-facing tether latch option, and its strong steel interior. Three of these fit across a row of seats in most mid-sized vehicles.

Why Parents Love the Diono Radian r100 Combination Booster Seat

  • It’s the only car seat you’ll need from 5-100 pounds
  • Easy installation
  • Professionally and safely made

Why Children Love the Diono Radian r100 Combination Booster Seat

  • Low-sitting profile helps them climb in easily on their own
  • Comfortable
  • Can be used up to 100 pounds


  • All-in-one convertible car seat
  • Unmatched safety from steel frame
  • Easy installation
  • Folds flat
  • Additional side-impact protection
  • Safe Stop energy-absorbing harness
  • 5 shoulder and 3 buckle positions
  • Long seat bottom and expandable sides
  • Rubber bottom grips for no-slip installation
  • 1 recline position for the rear-facing position and 2 recline positions for the forward-facing position
  • 10-year lifespan
  • FAA certified

Installation Options

  • SuperLATCH system
  • Rear facing Tether LATCH option
  • Seatbelt Installation

Weight Capacity

  • Rear Facing: 5-40 lbs
  • Forward facing in 5-point harness: 20-65 lbs
  • Booster: 50-100 lbs and up to 57” tall

Weight and Dimensions

  • 23 lbs.
  • Inside seat height: 25”
  • Seat width: 14.5”
  • Seat pan depth: 13”
  • Exterior shoulder width: 17”
  • Interior shoulder width: 14”
  • Harness strap positions: 17.5”, 15”, 12”, 10.5”, and 9”
  • Crotch buckle positions: 7”, 5.5”, and 3.5”
  • Can fit three across in most mid-sized vehicles

Material and Care Instructions

  • Full steel frame
  • Reinforced aluminum sides
  • Energy absorbing EPS foam
  • Premium plush interlock knit fabric
  • Rubber bottom grips
  • Machine washable cover
  • Line or air dry cover
  • All other parts are to be wiped with damp cloth with warm water
  • Towel dry