The Mountain Buggy duet vs the +one: which to choose?

A side by side look at the +one & the duet— updated info on using the +one below

mountain buggy +one

Trying to decide between the 2 fabulous and unique strollers from Mountain Buggy, the duet & the +one? Well, I have been lucky enough to have fully tested both of these new wonders from one of my most favorite stroller lines. Both of these strollers offer something new for those of us who need a stroller for two. Best of all, they have been based on Mountain Buggy models that we already love with all of those great Mountain Buggy features. Both offer adjustable handlebars, removable bumper bars, lockable front wheel(s), rear foot brake, the fabulous new twist & slide harness, standing fold, the very handy bottle holder and that very hard wearing mountain buggy 600D fabric.


mountain buggy +one image

The +one:

Configuration: inline single to  double (unzip the seat extender and footwell to add the included second seat or carrycot)


Based on: the Urban Jungle 


width/wheelbase: 25 inches 


weight: 30 lbs (it feels much lighter)


wheel size: 12” air filled tires


suspension: rear


recline: infinite position full recline for the front seat in single mode


suitable for ages: 0-6 (can be used with the included infant cocoon in single or double mode, or the carrycot or travel system in single mode)

 enlarge to see the +one’s possible configurations

weight limit per seat: 44 lbs


canopy: height adjustable, extra large follow the sun canopy with zip put mesh panels & pop out sun visor in front (it can ratchet forward  or be pulled back to cover either or both passengers as needed)


use with a ride on board: yes, it’s freerider approved in single mode with the standard connector


 image mountain buggy duet

The duet:

Configuration: side by side double


Based on: the Swift, MB’s lightweight single


width: 25 inches (the narrowest side by side and it’s still fabulous)


weight: 34 lbs (that is just 2 lbs lighter than the Duo’s listed weight, but it feels about 10 pounds lighter)


wheel size: 10” air filled tires


suspension: none, but those 4 air tires offer a very smooth ride and easy push anywhere you go


recline: independent infinite position full recline


suitable for ages: 0-5 (can be used with the optional carrycot or travel system, can take one or 2 of either)


weight limit: 79 lbs


canopy: 2 independent canopies with pop out sun visor & peekaboo windows


use with a ride on board: yes, it’s freerider approved with the standard connector



Which to choose?


Honestly I love them both and in a perfect world I would (hopefully, will) have both. If you have young twins or 2 riders on the larger side, but don’t want to go with the Duo, the Duet is great. It is so slim that you can go anywhere a shopping cart will fit. I tested it out on a crowded Saturday afternoon at our local Ikea and we rolled through even the tiniest of spaces. The seats are slim, but my very large 4 year old who fills a Duo seat fits about the same in the Duet seat. The basket is a bit larger than the +one’s, but the wheels are smaller and it lacks the suspension. Under most conditions this won’t be an issue, but I really love the bigger wheels. The +one is a bit more rugged overall. If you’ve tried both a Swift & an Urban Jungle, you’ll know what I mean. If you haven’t, the Duet is meant to be lighter, sportier, a bit more urban while the +one is built to go anywhere and take on anything in it’s path.  


If you have 2 children of different ages, older twins or a part time rider, the +one is a great choice. It really can be a single or double and when the 2nd rider is not on board, you will still feel like you’re pushing a single, just with a bit of added cargo space. And when you don’t need a double (or if you just want to be ready for the future) it easily convert back to a single, so it keeps on going for as long as you need a stroller. For those of you who don’t like having a lower back seat rider or kneeling down to get your child in and out of the back seat (especially in bad weather) the +one solves those issues with a higher rear seat- stadium like seating- that you can access standing upright and you still have use of the basket. Another plus,  you get those wonderful 12” air tires from the Duo and the Urban Jungle which can take on anything. If you have bad winters or or lots of muddy terrain to slog through, the +one will have the advantage. Both are great in and out of the car. They aren’t umbrella strollers by any means, but they are easy to fold, lift and carry. If you’re wondering how either compare to a Duo, there is no comparison. The Duo is heavy and cumbersome when it comes to car travel (though I still love it so), both of these are infinitely easier. If you have 2 really big riders, do lots of walking, don’t have space issues (car, doors, crowds, etc) and  in & out of the car isn’t a concern, you might want to stick with the Duo. Otherwise, both are great smaller options. 


My main testers are 22 months & 3, with additional help from my 4 & 6 year olds. All 4 really like both strollers and are more willing to ride in these than most others. My 3 year old prefers the duet for some reason, but he will ride happily in the front or rear seat of the +one too. Both younger riders fit fine in all seats- plenty of room everywhere. Only my very large 4 year old felt a bit confined in the back of the +one, but he rarely rides in a stroller and would probably only ride in the front seat occasionally anyway. My also very large 6 year old tested only the front of the +one and he did fit with plenty of headroom even with the canopy on the lower setting. He said that the seat was very comfortable and really enjoyed the ride. Really both of these are great for 0-3 or 4 years old, but can go a bit beyond when needed. 


Back to which to choose- it really is which one suits your needs better- side by side vs inline, full time or part time double or if you really need those bigger tires- because both are fantastic strollers. I really would love to have both. Any specific questions about one vs the other, just let me know and I’ll do my best to answer them. 


For a full review of the new +one, please click through to my review on BabyRazzi. I was lucky enough to have an early pre-release visit and have written it up in detail. Soon to follow,  also on BabyRazzi, my full review of the duet, my current every day stroller. For more details on each, please visit the Mountain Buggy site. Below I’ve added a few shots of the strollers in use here  as well as the lifestyle videos below so you can get a better look at each in use. For even better detail, be sure to check out the instructional videos on the Mountain Buggy site. 


I have now been using my very own +one for several months and it’s really superb. The 2 things that I hadn’t figured out on my short test visit were 1) how to quickly switch it back to a single, say if I wanted to use my Freerider 2) how to get a sleeping child into the back seat.

1) If you just pull up on the side straps that allow more room for the back seat or the cocoon, you in, effect remove the back seat area and have a single. The back seat does just flatten up out of the way and you can use your board, as if it were a single. A side note:  You do have to collapse the seat to use a Freerider, but you can actually use a Buggy Board with the extenders with the back seat area fully extended. So, in effect, you can use a board with both seats in use. I have tried it, but it’s very hard, especially if all of your children are larger (mine are 2, 3 & 4 and weigh a total of around 100 pounds). It’s not something I’d recommend doing on a daily basis, but in a pinch it can be done.


2) If you need to add your sleeping toddler to the back seat, it does seem impossible and it is, unless you unhook the front seat (those 2 strap clips that go around the frame) and fold it forward. Once you do, you will have enough access to place your child in the seat, get their feet into the foot space & do the harness without waking him or her up. Just be sure to re thread and snap the straps back into place before putting anyone in the front seat.  You can also use these same straps to add a bit of recline when you only have one rider in front or cinch it up tight when you have two on board to keep heads from knocking.