Downtube miniB belt drive Folding Bike

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mini sunset

This 16 inch mini folding bike is our smallest and lightest bike, making it perfect for travel. It is super compact to fit in the trunk of a vehicle or into a standard sized suitcase. You will fall in love with the 8 speed which is paired with a Gates CDX belt drive system. The gear range on the 8sp is 307%, which is equivalent to having traditional derailleur system. The internal hub/belt system is new to the bicycle industry. Rear derailleurs are known to be the weakest link on a bicycle, removing it makes the entire system stronger and more vibrant. Additionally, by using a belt system it is grease-free, hence there can never be a black streak on your leg, and you need not worry about messing up any place you leave your bike. Shifting will be butter smooth as is standard with Shimano's high end internal hub systems.

It is super lightweight because everything on the bike is aluminum and the miniB (Belt) employs a Gates Carbon belt and cogs. You will really fall in love with the idea of having frames made from lightweight aluminum and an integrated headset, and bag interface on the headtube ( we have custom bags on the way ). We are now including free accessories on all miniB's: a rack, kickstand, and rear fender. The rack is perfect to carry loads, and the rear fender will keep you clean even when the terrain gets dirty. A font fender is not necessary since the frame will act as a front fender.

The Tekro V brakes in combination with the machined-sidewall rims make the quality means it stops super fast. 

Overall, this mini bike is really small, light and the drive train is nearly maintenance-free. This is the ideal bike for a boaters, RV'rs, rail and for airport travel. 



- 8sp Shimano Nexus
- Gates CDX Carbon belt drive with 70T front ring and 22T cog
- Sub 15 second folding time.
- Tektro V-brakes and Levers
- Folding left and right pedals for compactness
- High rise handlebars to allow the rider to stretch out and feel comfortable
- Quality comfort grips
- Front Quick Release skewer (Internal hubs can not have QRs.)
- Gel saddle
- Stem has a screw in dial to minimize flex.
- Adjustable height stem
- Cold forged crank with replaceable chain ring ( 8sp model ) 
- Stronger V shaped rims with machined sidewall rims to improve braking performance - Water bottle braze-ons
- 8 speed gripshift
- Oversized 1 1/8in integrated headset, for increased durability and performance
- Double wall machined sidewall 16in alloy rims
- Quality front and rear Kenda tires



Folded size: approx 13" x 22" x 31.5"
Weight: 25.5 lbs (w/o rack, fender, kickstand, saddle, pedals). Please note all these are included
Folding time: 15 sec
Rider Height: 4'9" - 6'1"
Rider Weight 235 lbs max.
Frame: Xtra-Light Aluminum frame
Saddle: Velo Gel w/large spring comfort saddle
Seat post: Kalin 30.4 mm 500 mm Aluminum seat post
Brakes: Tektro Aluminum V brakes
Brake Levers: Tektro Aluminum Brake levers
Front wheel: Quando 24H QR hub w/V-shaped machined sidewall rim
Rear Hub: Shimano 8sp ( 307% gear range )
Gear Inches: 8sp 22.6 ( 1st ) - 69.2 ( 8th )  
Tires: Kenda 16 (305mm) x 1.5" ( on 8sp models ) 
Shifters: Shimano 8sp gripshifter
Cranks: Prowheel 170mm
Belt: Gates CDX belt
Pedals: Folding right and left

mini Features


mini Folding Demo




8 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Hirofumi Nagai on Jul 15th 2017

    Stylish, clean, and best fit for commute.

  • 5
    Petite & Sweet

    Posted by Unknown on Feb 22nd 2017

    I moved not too far from a transit hub, so I got the 8 sp Mini for commuting. I can hop the train and then bike to my destination. It does this wonderfully. I like the belt drive, because I don't worry about mucking someone's dress clothes for work when I am in a packed car. Plus, it is like riding in stealth mode.

    Well, this gem of a bike is fast and fun. Now I am riding it everywhere. I am not to far from the beach, so I load up the backpack, ride to the beach and not worry about parking. Instead of driving to the store to pick up a forgotten whatever, I ride the bike, fold it, put it in the cart, get what I want, and head home.

    I did a couple of mods. I added fenders to keep the mud and water off me for the beach rides. And, I added a removable rack for when I have more than my backpack can carry comfortably.

    By the way, the Mean Green Machine (my wife's nickname for my mint green Mini) is an ice breaker. My teenage boy loves it. He did the mods. I get asked about this bike all the time. I have ridden a Dahon Curve The Mini has it beat on style points alone in my opinion. When you add the ride, the belt drive and the 8sp IGH, well it truly is no contest.

  • 5
    Downtube Mini 11 speed, Awesome bike and Customer Service

    Posted by Unknown on Jan 11th 2017

    I would definitely recommend this bike! It is very fun to ride. Quiet, clean and fast.
    After researching folding bikes I decided that I wanted one that could be packed in regular checkable airline baggage (not oversized) and that had a belt drive and an internal hub geared for climbing hills. The Downtube Mini is one of only two options that I found on the current market that meets these requirements (apparently Bike Friday just released a new bike, called the “Pakit”, but it is 2-3 times the cost of the Mini and I haven’t seen any reviews on it at this point).
    Here is a list of the concerns that I had about buying a Downtube Mini and what I learned:
    1) The bike would be too small for me (I am 6 feet tall). It fits me just fine with extension of neck/stem and the longer seat post.
    2) The bike would not climb hills well as I live Tacoma Washington which is very hilly. With the Alfine 11 hub the bike is geared low enough to tackle the steepest hills in my area.
    3) It might not fold well into regular airline baggage (so I would incur additional charges for checking oversized baggage). The mini fits well into the Samsonite F’lite hardcase. I did have to disassemble the bike at the neck and frame hinges but it is not hard to do. Takes about 10 minutes to disassemble and pack or to unpack and reassemble.
    4) Parts would be hard to replace/find. According to Yan, only the frame and forks are proprietary so replacement parts should be found easily.
    5) Customer service might be a challenge since the bikes are not found or commonly serviced in bike stores. Yan is great! He answers e-mails promptly, is easy to reach by phone and is very helpful in solving problems. I had a loose neck on the Mini when it arrived and he replaced it with a new one without issues.
    There is a potential downside for those who like to use rear rack panniers. Panniers on the rear racks of 16” wheeled bicycles tend to hit the heels of the rider as they pedal (this is not unique to Downtube). There are makeshift solutions to this such as moving the rack backwards (using some hardware and creativity) but the easier solution is to replace the stock rack with a seatpost mounted rear rack with a quick release. This puts the pannier higher and further back so your heel doesn’t hit the pannier. This is what I do and it works just fine. It does create an additional step when folding the bike (you have to loosen the quick release of the rack before lowering the seat post) but it is very fast.
    How does the Mini compare to a Brompton?
    Bromptons seem to be the easiest/fastest folding bikes on the market and the most compact when folded. However, I believe that the Downtube Mini 11 speed is a better bicycle especially for the price. The Brompton costs at least $600 more and that would only get you a 6 speed hub. I test road a 6 speed brompton at a local Seattle bike shop this week and I could not climb the steep hills next to the shop. But with the Mini I could. I have heard that Brompton can be customized to have “mountain gearing”(lower gears) but I don’t know how low the gears go and what the added cost would be for that option.
    To summarize, the Downtube Mini 11 speed is a great folding bicycle and at a good price.

  • 5

    Posted by SHOICHIRO TOYAMA on Sep 15th 2016


  • 5
    Downtube mini 11 Folding Bike

    Posted by Unknown on Sep 3rd 2016

    Really enjoying riding this great bike. Everything working fine on the bike. I usually ride 7-10 miles 5 days per week. Really a good idea to tighten everything up after you unpack the bike and make sure everything is adjusted right. May want to have a bike mechanic do this if you are uncomfortable doing this yourself. Thanks for the fast ship and fast responses to my questions.

  • 5
    World tourer

    Posted by John Haines on Jul 31st 2016

    The Mini will become my new world touring bike. i've taken different bikes on the plane with me for a number of years. I commute 12 mo of the year. The mini is solid, a wonderful ride, fantastic gearing ratio for large loads. I am outfitting it to take my large panniers and pull my collapsible aluminum trailer. Excellent service from Yan on my second bike from him.

  • 5
    Thanks for the mini

    Posted by Tori V. on Jul 31st 2016

    I just wanted to take a moment to thank you for making your "mini" available to me. I am short, and really didn't mind paying more for a bike that would fit me better. I continue to be impressed with this fun bike, and am SO GLAD that I bought it when I did! Thank you! This bike is now 6 years old and going strong, and I still like this little package! It keeps up fine with the larger frame downtube, or other touring type bikes, and I'm glad to say that its still exactly what I need!

  • 5
    Great service

    Posted by Geof Gee on Jul 31st 2016

    I just received the Mini and did a few modifications to it. While I have ridden too few miles to give a quality review of the bike, I will write that Yan has been more than helpful responding to e-mails and providing good customer service. In our case, the handlebar base never arrived. I e-mailed Yan and in less than 24 hours, a new handlebar base was mailed to us.