8C Internal hub chain drive folding bike

( 2 Reviews )

The economical 8sp internal hub commuter. Sold out for 2019 ( 4/22/19 )

The Downtube 8C is the economical 8sp internal hub folding commuter bike. The 8C has a Sturmey Archer 8sp internal hub, a KMC stainless steel chain and standard easy to replace chainring/cogs.

Thanks to the completely sealed Sturmey Archer 8-speed internal hub, damage from dirt and grime is something that you no longer need to worry about. The 8C's smooth rolling hubs, 39T front chainring and 25T rear cog allow for a perfect range on the 20" wheels. This will help you to climb any gear with ease and reach a speed of over 20mph. A clean and quiet ride is also an added perk of the internal hub.

To make the 8C even more convenient, we've added a heavy-duty rack, suspension fork, kickstand, and lightweight fenders to its super-light aluminum frame. The Tecktro V brakes with the double wall machined-sidewall rims on the 8C make a flawless braking experience. The disc front hub means moving over to a disc brake system is quick any easy, though we recommend rim brakes for commuters & travelers.

If you are using the 8C to commute, you'd be please to know that we've added a water bottle braze-on (cage is not included), an interface for the headtube bag system to make your rides much more convenient. The Additional mini-bar ends and high-rise handlebars will give you more comfort by customizing the fit without interfering with the fold.

Whether you are an RVer, a boater or a commuter, the 8C will give you everything you need from a bike and more.

Being the only 8sp internal hub folding bike at under $1000, this bike is an opportunity that only exists because of Downtube's unique business model that minimizes cost and prioritizes quality.


  • 8sp Sturmey Archer internal hub
  • stainless steel KMC chain
  • Preload adjustable transarch Zoom suspension fork
  • 8C uses Sturmey Archer gripshift
  • Lightweight and easy to fold alloy pedals
  • Upgraded cold forged crank
  • Machined sidewall rims
  • Longer Seat tube to allow for taller riders
  • High-rise bars
  • Folded size: approx. 14" x 24" x 33"
  • 30 lbs(w/o rack, kickstand, fenders, pedals, saddle )
  • Folding time: 10 seconds
  • Rider Height: 4'9" - 6'3" 
  • Xtra-Light Aluminum frame
  • Gear Inches: 29 ( 1st ) - 94 (8th )
  • Stainless steel KMC chain
  • Prowheel cold forged cranks
  • Folding aluminum pedals
  • 8sp Gripshifter


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 φ30.4*500mmL
CHAINWHEEL CHARIOT-611A   steel single 1/2"x3/32" 39T
CRANK Prowheel 170mmL alloy
CHAIN GUARD alloy CNC  guard 
PEDALS Wellgo FP-7 alloy hi-impact body, foldable, 9/16" axle
CHAIN Z410, 1/2"x1/8 106 links
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 Sturmey Archer XRF8   W/25T alloy  14Gx28H*13/32"x116x155  1.8T 
SHIFTER(S) Sturmey Archer TSS80  index 8-speed
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
Current stock: 0

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2 Reviews

Herbert Dluhy Jul 10th 2018

8C bike

Very nice high quality and solid bike'. I have an 11 year old 8C bike and miss that nice fitting at the top of the stem bar that allows me to put the handle bar much further aft. The pedals are slippery and I replaced them with cheap plastic non-folders. The shiny aluminum parts of the old version are now black, and I hope it is anodizing that will stand up to the salty climate here.

James Kirby Sep 4th 2017

Nice Bike

Delivered on time. Had to adjust the hub but other than that we unfolded them and started tiding. Seem to be good quality bikes. We live on a boat so only time will tell how they will fare in the salty air. All in all very happy with them.

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