radian r100In the beginning of September 2011, Sunshine Kids changed their name to Diono and of course it’s sounds more familiar name for us. Diono has introduced a new generation of convertible seats named Radian R100. The Radian R100 is a 3-way car seat that will be with your child from infant to grade school. It begins as a rear facing infant car seat, turns into a forward facing child seat and a booster seat that protects your child or older toddler, while giving them a boosted view of the scenery around the car.

A convertible car seat is a good choice because it saves you money in the long run. You will only need one seat to fit your needs over the years that your child is required to sit in a car seat, rather than having to buy three separate ones. Installation was a little trickier than what you are used to with some other car seats. It is heavier than your average car seat but it is very sturdy, comfortable, and fits great in a sedan. Good feature is that the seat actually folds down and has straps to carry it like a backpack and leaves your hands free. Radian R100 is a highly versatile car seat that could be the only seat you’ll ever need, kids will feel comfortable. It comes with 3 choices of colors: Dune, Shadow and Stone.


Radian R100 Car Seat

The Radian R100 design begins with a steel alloy frame for a basis that stands strong while other features disseminate crash forces away from your child. Its aluminum reinforced side walls are lined with thick, energy absorbing EPS foam for excellent side impact protection. The SafeStop energy absorbing harness offers extra protection for children 20 to 40 pounds in the forward-facing position. When installed, SafeStop provides bungee-like energy absorption which reduces impact on the child. Additionally, the RadianR100 boasts rear-facing tether capability to reduce seat rotation during an impact.

This car seat has surpasses Federal crash test standards and meets NCAP standards, the industry benchmark for verifying child seat performance in severe accident conditions. The Diono R100 is tested at its maximum forward-facing, rear-facing, and booster weight capacities, and is rated for 10 years of life. The RadianR100 can be adapted to your child as they grow, keeping their car rides safe and comfortable for years. This Diono Radian car seat is safe, comfortable and good choice whether you’re buying for your own baby, or as a gift for someone else.

radian r100 seat

The weight limits for each stage of the R100 are as follows:

Weight Requirements
Rear facingup to 40 pounds
Front facing20 - 65 pounds
Booster seatup to 100 pounds

It also has a very slim profile allowing you to fit 3 car seats across the back seat of a mid-size vehicle, which makes it perfect for families that need to use more than 1 car seat. As an example of how many car seats you can fit in one vehicle, according to reviews, one parent was able to fit 3  in the back of a Kia Optima , another fit 3 across in the back of a 2001 Honda Accord , and another put 3 in the rear seat of an Escape.

Radian R100 Features:

  • Dimensions:
    Open: 28.5″ H x 17″ W x 16″ D
    Folded: 28.5″ H x 17″ W x 7″ D
    Weight: 23 lbs
  • Adaptable design with three modes for growing kids
  • Steel alloy frame and energy absorbing EPS foam
  • Comfortable, washable cover
  • Secure SuperLATCH installation
  • Five-point harness
  • Compact, folding seat is approved for airplane

What’s in the Box

  • RadianR100 Convertible plus Booster Car Seat
  • Rear-facing base
  • SafeStop harness
  • Rear-facing tether connector strap
  • Instruction manual

Diono RadianR100 Review

As with any car seat, there are always pros and cons, so we’ll explore the reasons why this Diono RadianR100 may or may not be just the car seat you’re looking for.


This car seat is a beast, very strong and sturdy.
Easy to install forward facing with the latch system, very easy to get tight with a proper installation
This seat is worth the price considering that it can grow with your child for so long
The option to recline the seat when forward facing is a nice feature
The petite 3 year old was very comfortable in the seat


Heavy car seat
Can’t fit rear facing in some car
The 3 year old fell asleep and his head did fall forward and to the side. This can probably be remedied with reclining the seat (according the the manual) and providing a small travel pillow.

You can read some review below from people who purchase this product online:

I have used Britax Marathons for years with my two girls. I love those seats, but we recently sold our Yukon for a Chevrolet Equinox. It gets much better gas mileage but is considerably smaller. There was no way to fit both our seats and another person in the back seat so we got two Radians. It is a little tight, but with both Radians in the back seat a third person or third car seat will fit. I like the fact that is converts to a booster when we are ready. I will say I have owned several car seats over the years and these were by far the hardest to install. I think this was in part to the short tether strap adjustment and the fact that our read headrests are unmoveable. We also have some generic seat protectors that we have used under all our other seats. We had to get rid of those in order to get a good fit for the seats. Both my girls are comfortable in these seats and like how low they are compared to the Britax.

Overall, if you have the room, I still beleive the Britax Marathon is a better seat, but if you need space this is still a good solid seat. It does have several similar features of the Britax. I miss the ease of use for adjusting the straps on the Britax. Both my children are forward facing, so I cannot speak to the rear facing options for this seat. I would recommend this seat to anyone with more than one car seat in the car and/or who drive small and midsize vehicles.

Read More Review on Amazon.com…..