Downtube 9FS Full Suspension Folding Bike

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9sp Full suspension folding bike
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Light aluminum frame, comfortable full suspension, 9sp cassette drive train w/trigger shifter ( expandable ), disc hubs, cold forged cranks, aluminum pedals, bag & pump interfaces, off road worthy
9FS folding bike sunset

The Downtube 9FS takes folding bike comfort to a whole new level. With its state-of-the-art front and rear suspension system, the 9FS is the most comfortable bike we offer. The suspension will absorb the road imperfections, which will keep your body fresh. Long rides will seem shorter than ever thanks to its comfort and build quality.

The top tier light aluminum frame makes the 9FS smooth to ride around the clock. It's also rock-solid when it comes to build quality and has an expandable frame will simply grow with you.

The 9FS comes fitted with a front derailleur braze-on ( with cable routing ), disc brake tabs, head tube bag interface, pump interface, kickstand mount, two water bottle braze-ons, rack braze-ons, and removable frame protector from below can act as a kickstand when folded.

All this makes taking the 9FS on a trip around town or around the world as convenient as it gets.

The quality of the 9FS begins with the suspension system and solid aluminum frame, and extends into every single detail. This includes massive welds, beautiful design, cold forged cranks, and lightweight integrated headset system.

Ride the 9FS around and you will instantly feel the quality of the high end 9sp racing drive train. With a performance matching that of the Shimano Deore, this is the best quality drive train you will find on a folding bike under $1000.

Once you try using the brakes, you’ll notice how powerful they are. The 9FS comes fitted with high-end two finger Tektro levers (with a comfort rubber grip) Tektro V brakes and matching double-wall aluminum-machined sidewall rims.

The textured rim surface is essential to get optimal braking performance, other manufacturers still use slick rims which allow the brakes to slide on the rims surface. This bike is also disc brake ready with 6-bolt interfaces on both front and rear hubs, and cable stops for discs.

The stock brake system is ideal for the majority of customers, and better for travelers ( disc rotors are likely to bend while folding & unfolding) . Please read our disc vs V-brake article to decide which is best for you. Overall, the quality brakes make stopping quick and easy.

Turning the 9FS into an 18 or 27-speed bicycle is super easy thanks to the front derailleur braze-on with cable routing, which is included with every 9FS folding bike. We use 130BCD cold forged cranks which will accept another chainring for easy conversion to 18sp. for faster downhill riding, all you have to do is place a bigger chain ring. Most customers go with 58T-60T big rings. Please read about double and triple chainring conversions.

Despite being so feature-packed, the 9FS is extremely portable. When folded, you can conveniently fit it in any vehicle, boat, or train which makes carrying it around as pleasant as riding it.

The 9FS a steal at $499. Folding bikes with similar features are more than twice the price. This is due to our low-cost, customer direct high-value business model.

If you are looking for a premium folding bike with suspension at a bargain price, the 9FS is what you are looking for.


  • Integrated threadless headset
  • Front derailleur braze-on will allow one to turn it into a 27sp bike.
  • Head tube and seat tube interface for bags, pumps, or battery packs
  • Rear swingarm bolt can be removed from non-drive side (easy to disassemble the frame for super compact storage)
  • Lighter stem which folds thinner
  • Upgraded drivetrain w/trigger shifters
  • Disc hubs (front and rear) with disc mounts on the frame
  • Upgraded brakes, levers, and noodle
  • Upgraded BB
  • Lighter fork
  • Powder coat paint with clear coat on top.
  • Aluminum stem dial (older models used plastic)
  • Upgraded cable housing
  • Upgraded kickstand mount
  • Cold forged cranks
  • Sealed cartridge bottom bracket.
  • Preload adjustable trans-arch suspension fork
  • Rear disc tabs
  • Lightweight and easy to fold alloy pedals
  • Alloy and stainless frame and stem quick releases
  • Machined sidewall rims
  • Lowest price 9-speed folder brand in the world...all others cost over $1,000!
  • 24H/28H spoked front/rear wheels for light weight
  • 1.5" front tire for low rolling resistance
  • Replaceable 48T chainring
  • Stainless Steel spokes
  • Upgraded brake levers with textured grip
  • Frame interface for pump on the rear of seat tube
  • Mini bar-ends (With many folding bikes, it is difficult to steer with a long stem. Bar-ends solve this problem but make the bike difficult to fold. Not with our mini bar-ends - they are easy to turn and easy to fold!)
  • Folding left and right pedals for compactness
  • Plastic chainring cover to make keep chain from getting dirt and grime in your car or storage area. Also keeps the chain from falling off
  • Ding-a-ling bell to alert pedestrians and cars
  • Extra-wide rise handlebars to allow the rider to stretch out and feel comfortable. Rotating the rise bars can push the rider towards the saddle ( for upright comfort riding ) or away from the saddle (for more aggressive riding)
  • Super duper soft comfortable grips
  • Adjustable height stem allows bike to be used by kids and adults
  • Front and rear Quick Release skewers to quickly remove either wheel
  • Velo "love channel" saddle
  • Braze-ons to allow a water bottle cage or pump
Folded size: 14" x 24" x 35"
Weight: 27.5 lbs
Folding time: 13 seconds
Rider Weight: 255 lbs max.
Frame: Xtra-Light aluminum frame with 850-pound coil spring shock
Fork: Zoom fork with disc tabs for disc brakes
Saddle: Velo "love channel" saddle
Seat post: Kalin 500 mm aluminum seat post ( super long to accommodate short and tall riders )
Brakes: Tektro aluminum V-brakes with strong springs (frame includes cable routing for disc brakes and disc-compatible hubs)
Brake Levers: Tektro aluminum brake levers (with 2-finger comfort grip)
Front wheel: Quando 24H QR disc hub with double-wall rim & stainless steel spokes
Rear Wheel: Quando 28H QR disc cassette hub with double-wall rim & stainless steel spokes
Tires: Kenda 20 (406mm) x 1.5" front and 20 (406mm) x 1.75" rear
Shifters: Sun Race 9sp triggers (the best value trigger shifter in the market)
Cassette: Sun Race 9sp 11-32 (this is one of the nicest cassettes on the market) Derailleur: Sun Race M93 9sp ( one of the smoothest derailleurs )
Cranks: Prowheel aluminum 170 mm 48T with chain guard
Gear inches: 28 to 81.5
Chain: KMC with masterlink for super-quick removal & cleaning
Pedals: Aluminum folding right and left

9FS Features

9FS Folding and Unfolding


One year limited warranty. Two year warranty on the drive train through Sun Race.

30 day satisfaction guarantee on all Downtube bikes.

Please see our terms and conditions for details.

15 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Tom on Jul 31st 2016

    One word- UNBELIEVABLE. I'm not joking. I have the 9FS and the bike is simply amazing. I'm already going to order some extra parts, but bought the bike used. Now the only thing I wish is that I just bought it new. That's because they don't lose a lot of value, so you might as well get the newer one. And with the black out bits I think they look more modern. Here's a few impressions I've gathered:

    I read a rant from someone stating the brakes aren't that strong. So I put this to the test. I took it down the hill next to my house that has an easy 50 degree incline- stopped on a dime. I weight 160lbs and thought about upgrading to discs. Why? They work great just the way they are.

    Build quality is great. Solid as a rock. I hear the 2013's are even better, but the 2010 I have can be tightened down perfectly with no wiggle in either the handles or seat post.

    9 speeds work great. I thought they might not be enough, but now I'm wondering why I'd need more. I've taken it on a long ride and can't seem to find any need for extra gears. If your a bike nut, then maybe. But for the average Joe- well, I just don't see how you could be disappointed.

    The handle bars are wide- and I love it. I didn't know if it would matter but IT DOES. It makes it so much more comfortable and easier to maneuver. You completely forget your on a folding bike.

    Adjustable suspension! I thought it might be to soft- wrong again. It's so easy to adjust and felt absolutely perfect even climbing hills.

    It folds fine. Is it the most compact in the world. No- but who cares? Frankly, I can't tell at all. It fits in my Chevy Sonic with a ton of room to spare. For the added comfort of a suspension, I'll take a few extra pounds.

    I'm so happy with this bike that I'm almost obsessed with it. Tomorrow is suppose to be nice out and I can't wait to take it for a ride. I get tons of looks on this thing too.

    Now, time to start ordering all the extra bells and whistles. This is the best bike I've ever owned.

  • 5
    Great for my sailboat

    Posted by Thomas Perry on Jul 31st 2016

    Dear Sirs It's been two years since I've owned 2 of your wonderful bikes. I am a sailor and have often carried my full-sized bike on my boat to ride when we went ashore to enjoy the area. The bikes where too big and had to sit out on deck to travel which would subject them to the extreme salt air and sea conditions.
    I thought, how much more convenient it would be to have folding bikes, so I spent many months looking around our local bike shops then online for what I felt would be the type of bikes we wanted. I saw all the usual popular folding bikes but was concerned that the small 20" wheels would create a stiffer ride, I read many blogs and decided on the DownTube 8FH brand bases on the feedback I read, it was reasonably priced and comes with full suspension. We have used these bikes for two years now and love them. These bikes are dedicated to the boat only. Its quality built and has a smooth ride, great for the light dirt trails along the coast and the 8 speed internal hub to keep things clean verses the usual derailleur configuration. On my bike I have put on fenders, a front disk brake and a rack on the back with Panniers for carrying extra clothing or for picking up food etc. for the boat. The other I've kept stock. It weighs about 27 LBS. a bit more with the extras added but light enough to carry on your back in the carrying bag while climbing up the ramp from the boat ramps. The Bikes are folded into their own bags and kept in one of our 3 sleeping cabins and supported by a lee cloth. We have no problems getting them through the cabin door, the companion way or into our dingy. They are made of aluminium and built to withstand the sailing environment. We are no longer relegated to staying only around the marinas, but enjoy a daily bike ride to Light Houses, wharfs, farmers markets or city activities. Everyone that sees them says what a great idea and where did you get those? I tell them you can order them on line. For cruisers it's a great way to get your exercise and enjoy the back road sites of out coast line. Thank you for designing a great bike we enjoy them every time we unfold them.

  • 5
    Solid and comfortable

    Posted by Chris Ihm on Jul 31st 2016

    When I moved to an apartment in Queens I knew it was time to switch to a folding bike. I did a fair amount of research looking for one that was sturdy enough to carry my weight (225), would fold small and be fairly light to carry, would roll when folded, wouldn't break the budget. The 9FS met those criteria.

    I ordered it last Wednesday and received it on Friday as Yan predicted, and the bike was packed well enough that UPS wasn't able to damage it. In fact, after doing the bike-store-style checkup posted on the Downtube website, I was able to take it out for a quick spin two hours after I opened the box.

    Today I rode ten slightly-hilly miles on a multi-use path. The 9FS continues to feel solid and comfortable, and I'm looking forward to many more miles, and a lot more of the fun I had today. That is, if I can keep my wife off of it - I may need to order another one!