Diono Rainier All-In-One Convertible Car Seat - Black Plum

This item is discontinued.

5-50 lbs

20-120 LBS


28.5 H x 18.5 W x 16 D

Cup holder

Full steel frame and aluminum reinforced sides for unmatched safety.

Space saving design allows extra room for passengers while providing spacious interior for child.

Folds flat for storage and travel - it's even FAA certified! Optional carry straps (sold separately) make it even easier to take along

The machine-washable and dryer-safe seat cover helps keep your seat looking new and fresh.

Get top-tier safety and streamlined design with the Rainier convertible car seat. The full steel frame, extra-deep aluminum reinforced sides, and energy absorbing foam deliver unmatched protection for your little one. The rainier accommodates children weighing 5-120 pounds. It could be the only car seat you?ll ever need.

Diono convertible car seats are made from steel for safety you can feel. The fully integrated steel frame is wrapped in thick engineered plastic to withstand severe crash forces. Deep, aluminum reinforced sidewalls provide excellent side impact protection, while energy absorbing EPS foam surrounds your child for ultimate safety. Diono car seats are definitely worth the weight.

The rainier keeps children comfortably rear-facing from 5-50 pounds for the safest possible position. Body support cushions are included to keep newborns and infants comfortable and positioned properly.

Rainier accommodates forward-facing children up to 65 pounds in a 5-point harness and converts to booster mode for kids 50-120 pounds. The aluminum reinforced, adjustable head rest and extra-deep sidewalls provide the ultimate side impact protection.

  • Premium, plush interlock knit fabric
  • Full steel frame for unmatched safety
  • 12-position aluminum reinforced adjustable headrest
  • Extra-deep sidewalls lined with energy absorbing EPS foam for superior side impact protection
  • Comfortably seats rear-facing children from 5-50 pounds
  • Forward-facing capacity in a 5-point harness: from 20-65 pounds and up to 57″ in height
  • Converts to a booster for children from 50 pounds up to 120 pounds, and up to 57″ tall ? proper fit in booster mode
  • Safe Stop? energy absorbing harness
  • Unique SuperLATCH? system makes installation easy
  • Sleek design allows extra room for other passengers while providing spacious interior for child
  • Infant body support cushions and memory foam add comfort
  • Expandable sides and long seat bottom offer proper leg support
  • 5 shoulder and 3 buckle positions adjust for a comfortable ride
  • Rear-facing tether capability
  • Angled cup holder keeps drinks upright and within easy reach
  • Folds flat for travel and is FAA certified
  • Cover is machine washable
  • Rubber bottom grips for no-slip installation
  • 10 year life from the date of purchase
Product Reviews
out of 5.0
105 Reviews
Ratings Snapshot
of Reviewers
Scottsdale, AZ
Verified Buyer
May 23, 2022
Love this car seat and all Diono car seats! Bought it when my daughter turned 2 and she is still using it at 5! Washes easily and fits back together easily! Has held up nicely! Definitely recommend Diono!
Verified Buyer
Very sturdy seat…
February 3, 2022
We have used this seat rear facing until my son was 3 and now forward facing. It is so durable! Just gotta remember how to put all the fabric back on correctly after washing.
  • Washable
  • Durable
  • Rear or forward facing
  • Tricky to put fabric back on after washing
Bradenton, FL
Verified Buyer
November 7, 2021
This car seat is amazing! Love how skinny they are so you can fit 2 or 3 of them in one row! We are still using this seat for our little on several years later. Wonderful car seats.
Alliance, Nebraska
Verified Buyer
We love it!
August 16, 2020
I've had this car seat for 4 years now. At first, I thought it was a pain to move the seat from my car to the husband's truck because it is heavy but the more we did it the easier it got. We did have to purchase a new cover for it because my 3-year-old at the time was potty training and had an accident and when I tried to wash it by hand in the tub, the smell still did not come out. Now, 2020 we still have the same cover and seat, even bought a waterproof seat protector. The only thing I kinda don't like is that when he does take naps on long road trips his head will hang forward. Other than that we love it!!
Malden, MA
Verified Buyer
Great car seat.
February 6, 2020
We are very happy with this car seat and have been using it for the last 2 years. The only thing I don't like is that it doesn't recline in its forward facing position and that makes sleeping in it uncomfartable. Although my son never complained and it doesn't stop him from falling asleep in the car seat. We will be purchasing the same car seat but the current model for our daughter soon.
Mesa, Az
Verified Buyer
Love it
November 27, 2019
This car seat is amazing. It’s so cushy and comfortable for our daughter. We bought another one for our son since we like it so much.
  • Rear facing for our 4 1/2 year old
  • Heavy
Georgetown, Kentucky
Verified Buyer
LOVE this car seat
October 28, 2019
I love this car seat. It's heavy duty. I read a lot about convertibles and we settled on this one due to its frame design and construction, safety rating, and the many, many great reviews.
The colors are great, it's fairly easy to clean, not hard to install (if you watch the videos). Rear facing, you definitely need the foam accessory to go under. It will lean way back and could cause your passenger front seat to have to be moved uncomfortably close to the dash board. The weight limit on rear facing and forward facing is fantastic. We will definitely buy another for a second child.
  • Sturdy, strong. Great safety rating. easy to clean. luxurious feeling fabric and cushions.
  • Can be more complicated to install if you're not good with these kinds of things, Rear facing options requires the additional foam accessory to go under the seat to allow for more room up front. customer service for Diono is a little slow.
Jacksonville, Florida
Verified Buyer
Love the color
July 15, 2019
The pattern and colors are what initially attracted me to this car seat. Upon reading the reviews I was sold. I love that i had ample space in my backseat after installment. The only con I have about this car seat is that it’s a pain to take off to wash the fabric. I don’t even think I was able to put it back on properly after my last wash.
Chepachet, RI
Verified Buyer
Love this seat
May 21, 2019
I research long and hard before committing to a car seat for my daughter. This seat was perfect. Heavy, safe, easy to install with Extra padding for when she was little with plentry of room to grow. Rear facing until 4 with no concerns. Happy purchase. Would buy again.
San Marcos, CA
Verified Buyer
Great investment
May 7, 2019
This car seat is working great so far. It still looks good in condition. Cleans easy. Have traveled with it a few times and makes it easy with the ability to fold up for easy transport.
Denver, CO
Verified Buyer
Amazing car seat!
March 31, 2019
Great quality and well made. We love this seat for our heavy toddler. It kept him rear facing much longer than any other seat would have. I took one star because the seat cover faded in the sun rather quickly but all in all this is an excellent product.
Chula Vista, CA
Verified Buyer
Amazing heavy duty narrow carseat
February 2, 2019
Very strong and heavy duty. The steel frame is amazing. Great narrow seat.
  • Lasts for 10 years. Super comfortable.
Best Uses
  • Narrow cars
  • Heavy. Not easy to install.
Lebanon, NH
Verified Buyer
Love it!
November 1, 2018
This car seat is sturdy and well made. It fits narrow, no arm rest on two sides, so very easy for my 2 years to get in by herself. It's apparently very comfortable too, because my 2 year old loves riding in it. The sale price was pretty good too!
Moscow Idaho
Verified Buyer
So glad I finally made this purchase!!!
July 7, 2018
I was skeptical at first. I read at least 50+ reviews which were mostly positive. My Dr highly recommended this car seat for safety and longevity so I gave it a try.
Customer Images
  • -Very sturdy and safe.
  • -Very comfortable.
  • -5 point harness easily unclipped with one finger.
  • -Cup holder included and option to add more.
  • -Additional Padding for any fit. Padding for shoulders and chest. Padding to keep lower clip from rubbing. Padding behind head. Padding under back and butt!!
  • -Easy clip system in rear and front of car seat for even more security and stability.
  • -Comes with padding under car seat (sold separately) to help make room and keep from damaging seat.
  • -Arrived in under 5 business days.
  • -Allows rear facing kids up to 44? whereas most are only 30?.
Best Uses
  • Rear facing, front facing and booster up to 120lbs.
  • -Initial set up takes about 20 minutes to get a good fit for your child but after that it took me maybe 5 minutes to transfer to truck from suv.
  • -It is $314 normally but I found it here on sale for $259!
  • - I wish it had a sun hood.
Verified Buyer
Never been happier!
June 29, 2018
I never have to buy another car seat again. It's so comfortable my baby keeps falling asleep which is a plus. I installed with the adjuster in my small versa note hatchback and my husband 6'1 is still able to recline his seat as much as he needs. It was here on time with no issues. I will make another purchase if needed from this site!
Customer Images
  • Fast shipping. Very well packaged.
Best Uses
  • Use with Diono Adjuster for more recline room in car.
  • Very heavy but excepted for a steal car seat.
Garland, Texas
Verified Buyer
favorite car seat
May 3, 2018
so heavy duty and safe. the only thing is that it's super heavy, def not for moving from one car to another.
Tampa, Fl
Verified Buyer
May 3, 2018
If you're considering this car seat, buy it! We've been through the Graco forever, Chicco Nexfit, and Maxi Cosi Pria 85 Max. Graco was fine, but not a comfy seat. Chicco was nice and plush, but a pain to get our kiddo in and out of (he's really tall) and Maxi Cosi didn't tighen properly (we had two). I wish I started with Diono! I was thrown off by its look at first. It looked like a booster, and with a market flooded of car seats, I assumed I was reading something wrong that it fit an infant. Silly me. I love it, my son loves it, and so does my husband. Highly recommend!
  • Comfortable Seat
  • Easy tightening system
  • Tall enough for bigger kids but still safe for tiny ones
  • Folds and offers strap for travel
  • None!
Los Angeles, California
Verified Buyer
Diono Rainier
February 6, 2018
I LOVE this car seat! I purchased it for my 8 month old daughter. I had another brand but they were too bulky, took too much space and my daughter would hate getting in it. The Diono is perfect! My daughter is tall for her age but is super comfortable in the Rainier. No more fighting to get her in her car seat. Just bought a second one for grandma and grandpa's car. :) Knowing she is safe is worth the extra weight. Highly recommended!
  • Child fits comfortably
  • Thin design to fit smaller cars comfortably
  • Safety
  • Pattern is discontinued :(
  • Wish they would have more colors and patterns to choose from.
Jacksonville, Florida
Verified Buyer
My kids love them!
February 1, 2018
My kids may not like being held still for very long but they never complain about being uncomfortable or that they do not like the car seat. Their rear ends are big fans of this seat. I don't like how heavy and large it is when traveling through an airport but I think my small sacrifice is worth it. The safety, comfort, and longevity of this seat is unbeatable. I have purchased two, 18 months apart and would do it again.
  • Comfort, and safety
  • Weight
Lewisburg, PA
Verified Buyer
Very sturdy.
January 9, 2018
This is a very sturdy seat, the fabric is good my son doesn't seem to get hot sitting in the seat. It is easy to install. The one draw back it you have to remove the seat and reinstall when you need to adjust the height of the harness.
  • Strong and sturdy
  • Must uninstall car seat to adjust harness height.
Raleigh, NC
Verified Buyer
Doesn't fit anywhere near the 57'
January 4, 2018
Even though it's advertised to accommodate a child up to 57' and/or 65lbs., the upper shoulder strap slots are at 17'. The shoulder straps have to come out at or above the shoulder. This seat won't handle a child over about 45'tall. It was useless to me since I was counting on it to accommodate a child in the 5 point harness for above the normal height. I'm going to have to return it. It's a nice seat, very sturdy and safe feeling, but it isn't able to be used as described. Albee was very prompt, and did their part. This problem is with Diono. They need to be realistic in their height accommodations.
  • It was very sturdy. Heavy. Well padded! Nice color. Albee did their part. This problem is Diono's specifics not being realistic.
  • Won't accommodate a child over about 45', even though it states up to 57'. I do have to pay for return shipping ðŸ¤
Customer Q&A