8H internal hub belt drive folding bike

Was: $1,599.00
Now: $999.00
(8 reviews) Write a Review
Light aluminum frame, Shimano Nexus Internal hub, Gates CDX belt drive, cold forged cranks, fenders, rack, kickstand

Cutting-Edge Bicycle Technology


Due to popular demand, we're bringing back this popular bike with even more high-tech refinements in its 2018 version. The 8H model is always up-to-date with the latest biking technologies, such as the Gates CDX belt drive and Shimano Nexus 8sp hub. The drivetrain is rust-proof and won't stretch or slip as you change gears, which is perfect for boaters. The belt system is tried-and-tested technology more commonly found in motorcycle, the new belt's rounded carbon fiber teeth are more reliable, easier to maintain and provide a much smoother riding experience.

The Shimano Nexus internal gear hub of the 8H uses a single, handlebar mounted grip shifter that provides super smooth shifting, even at a full stop.

No more headaches from a metal chain, and low lying derailleur. With the completely sealed internal hub of the Nexus 8-speed gear, damage from dirt and grime is the last thing you'll have to worry about.

The newest model comes includes a disc front hub, 60T front CDX chainring & 22T cog, and suspension option which results in a much more comfortable ride. Having no rear derailleur, external shifter, cog, gears or chain means that you don't have to worry about improper shifting or cleaning the drivetrain.

Being enclosed in a completely sealed and maintenance-free setting, the 8H gives you a great riding experience without having to worry about things related to maintenance.

To make riding the 8H even more awesome, we've added lightweight fenders, a durable rack and a kickstand. The top-tier Tektro V brakes with aluminum machined-sidewall rims make stopping the 8H super-fast and smooth.

We've added a water bottle braze-on (the cage is not included), an interface for the headtube bag to make the lives of commuters using the 8H much easier. The headset is integrated into the head tube and additional mini-bar ends and high-rise handlebars give the rider a customized the fit without interfering with the fold.

The frame quick release, folding pedals and stem are also among the upgrades that were added to the new 8H.

With an $999 price tag and the fact that you'll never find a bike a Gates CDX carbon drive belt paired to the Shimano Nexus 8sp hub for under $2000, the 8H is a steal. Whether you're a boater, RVer and commuter, the 8H is a cutting-edge folding bike model that you'll definitely love.


  • Folded size: approx. 14" x 24" x 33"
  • Weight: 28.5 lbs no suspension model (w/o rack, pedals, saddle )
  • Shimano Nexus 8sp hub
  • Folding time: 15 seconds
  • Gates Carbon belt drive
  • Rider Height: 4'9" - 6'3"
  • Rider Weight 255lbs max.
  • Preload adjustable transarch Zoom suspension fork
  • Zoom transarch designed fork with disc tabs and alloy lowers
  • Shimano Nexus gripshift
  • Gear Inches: 8sp hub 27 ( 1st ) - 82 ( 8th )
  • Lightweight and easy to fold alloy pedals
  • Prowheel cold forged 170mm 60T Gates carbon ring 22T rear cog
  • Shimano Gripshift 8sp
  • Gates CDX Carbon Drive Belt
  • Machined sidewall rims
  • Longer Seat tube to allow for taller riders
  • High-rise bars
  • Folding right and left aluminum pedals


FRAME Downtube Aluminum frame
Shock N/A
FORK HL Corp CH-190AMS  20" alloy  suspension fork
HANDLEBAR HL Corp. MTB-AL-153PP  W:580 alloy
HANDLEBAR STEM HL Corp FB-AL-196-8 alloy φ28.6*25.4 *400 L.
BAR ENDS Kalloy BE-21 alloy  L:80mm
GRIPS Jie Li JL-311/312 110/80mm
SADDLE Velo VL-3037 3-04  B39  PU foam type, vinyl top
SEAT POST HL Corp. SP-233   alloy 30.4x500mmL
CRANK Prowheel 170mmL alloy
PEDALS Wellgo FP-7 alloy, foldable, 9/16" axle
BELT Gates CDX belt
TIRES Kenda F:20"x 1.5" R:20"x1.75"
RIMS HJC DA-17 alloy Double F:20"x1.50" 14Gx24H   R:20"x1.50 32H CNC
SPOKES & NIPPLES 14G*56  pcs,45#stainless  braze nipples
FRONT HUB KT-MD7F alloy 14Gx24HxM9"   QR   (disc front hub)
REAR HUB Shimano Nexus 8sp hub
SHIFTER(S) Shimano 8sp gripshift
FRONT BRAKE Tektro MINI-10  V-Brake 55MM shoes
REAR BRAKE (I) Tektro MINI-10 V-Brake 55MM shoes
BRAKE LEVERS Tektro RS392A, alloy levers w/alloy black clamp

8H Features Video

8H Folding and Unfolding Video


8 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Peter & Janet Terry on Jan 18th 2018

    We brought the bikes with us to Florida, and they've been wonderful. Smooth, quiet, comfortable. Thanks!

  • 5
    8H internal Hub Belt Drive Folding Bike

    Posted by Laurie Ritchie on Sep 20th 2017

    I bought this bike as we are sailing around the world and our 3 onboard bikes were subject to rust, were hard to store and with the chain grease getting the boat dirty. This bike is easy to ride, conveniently carries groceries in the accessory pannier bags and easy to store and unfold. It was such a success, my boyfriend got himself a 11H when he saw how much fun I was having. These are becoming a well used addition to our boat and will be much easier to bring ashore in our dinghy when we are anchored. Thanks, Yan, for your help in ordering the second bike and talking me through adjusting the belt when I assembled my bike.

  • 5

    Posted by Lyon Loomis on Sep 4th 2017

    I got my new 8H last week and love it! Thanks Yan, it was great to work with the owner/designer to get good info and questions answered. I had been wanting a folding bike with an internally geared hub and Gates belt drive for some time...the 8H brought those features to a price point I wanted. As a boater, I wanted the portability without the greasy or rusty chain. The 8H rides smooth, smooth, SMOOTH, AND QUIET. Very comfortable position for my 6'1" 210 lb frame. Love the longer handlebar and bar ends. Gone is the twichiness in the steering of some other very expensive fancy brand 20" folders I've ridden. The front suspension is fantastic! Also missing from those pricier bikes. Great job Yan! One little nit... the Shimano shift controller...not Downtube's fault. It runs reverse from the Shimano one on my 24 speed MTB. So, switching between bikes I have to think too much! Why so Shimano? Also noticeably stiffer upshifting versus down. GREAT BIKE...GREAT COMPANY.

  • 5
    Best Equiped Folding Bike for Design & Cost

    Posted by Neill & Kathleen Corse-Scott on Sep 4th 2017

    Researched a longtime to source the best folding bike for our specific needs for aboard a sailboat. The Downtube 8H bike model consistently was first on our preferred list to what other brands had to offer on an equal value cost comparison. There were none other out there that could fulfill our needs. We bought two of the same with the accessory panniers. Downtube's customer service & after sale follow-up is exemplary. We anticipate enjoying our bikes for many years to come!!

  • 5
    Excellent bike and value

    Posted by Joel Rothschild on Sep 4th 2017

    I have been riding my Downtube 8H in a variety of conditions, mostly city, for a month and I am very pleased with the bicycle's design, components, portability, and performance. I have taken it on many trains and buses without trouble, and I am pleasantly surprised how well it carries significant pannier freight when I am traveling.

  • 5
    review of 8H

    Posted by Scott on Sep 4th 2017

    I wanted a couple folding bikes to keep on my boat as we frequently sail to harbors and islands in MA and RI where the rentals are expensive and lots of wasted time. My initial preference was either the 8H or Dahon Mariner. I chose the 8H because of the belt drive and 8 speed internal hub. It's a pain to bag the bikes, get them into the dinghy, and then unload at a variety of beaches and docks, all of which would subject a bike with a derailleur to damage. Also, I wanted to avoid getting chain grease all over the place. So I bought one 8H and rode it around for a couple days and really like it. It's solid and I love the internal hub and shifter: great gear range and a nice low 1st gear for hills while toting a couple bags of groceries back from the market. My wife had been holding out for a different bike, but after a couple rides on my 8H she told me to buy another for her. So, if you're in the RI/MA area this summer, look for us on the 2 bright red H8's!

  • 5
    Great bike, great price

    Posted by Gabriel Chavez on Sep 4th 2017

    I purchased an 8H in early June. It was delivered promptly, but was damaged by the shipper. The front suspension fork was scratched. The damage was cosmetic and Yan took care of it. I have been commuting on the bike for several weeks and have been impressed. The belt drive and internal hub are a commuters dream. I also purchased the rack pack with panniers which is a nice set up for commuting. It's much smaller than the bags on my full size bike so I'll need to purchase the head tube bag system when it becomes available. I also own a Brompton which I like for the fold, but other than that the 8h is superior.

  • 5
    Belt Drive is awesome!

    Posted by Markus on Aug 22nd 2017

    Needless to say, that after one year of almost daily use of my 8H w/Gates Carbon Drive belt I absolutely love this bike and riding it. Currently I am upgrading it with some awesome Magura brakes [http://www.magura.com/en/], thus cherishing & leveraging my initial investment.