Reverse Gear in Bicycles For an ordinary bicycle (neither fixed gear nor capable of changing any gears).

Is it possible to modify it to have a reverse gear on it?

(i.e. reverse pedaling causes the bicycle to go backward)

(By modifying or attaching components to the rear wheel)

Thank you in advance
Such a hub exists for trike and quads . Pedal forward with 3 or 5 gears then having a coaster brake to stop . At full stop with the brake engaged continued backward pedal pressure will cause the cycle will move in reverse in a reduced gear . Sturmey-Archer has made these hubs for the niche market (velomobiles ) for some years now . The hubs have a sprocket bolted to the right spoke flange to drive the rear axle , some clever types have removed this and laced it into a wheel for a single rear wheel trike . Maybe this could work for a bike , still a question of balance in reverse ?! 


  model QS-RC5 with reverse+coaster brake
  model TS-RC5 only coaster brake and no reverse


SA Specification Sheet PDF




5 Speed internal gear hub with coaster brake
Special use hub, includes a reverse gear on QS-RC5 model


There's also a 3 speed version with reverse, model QS-RC3.

Specs


Hub Shell Material - 6061 Aluminium
Axle Diameter - 13/32” Slotted
Axle Length - 185mm
Over Locknut Dimension - 139mm
Right Axle Protrusion Length - 24mm
Left Axle Protrusion Length - 22mm
Flange Width - 65mm
Flange Sprocket Teeth - 22T
Flange Sprocket C.L. - 39.4mm
Sprocket Teeth - 21T through 22T
Sprocket Chain Line: 53.9mm
Indicator Chain - HSA585 Mark Yellow
Weight - 2010g


Gear Ratio


  • Overall Range - 256% 
  • Gear 1 - 62.5% (-)37.5% 
  • Gear 2 - 75% (-)25% (Gear 1 + 20%) 
  • Gear 3 - 100% Direct Drive (Gear 2 + 33%) 
  • Gear 4 - 133.3% (+)33.3% (Gear 3 + 33%) 
  • Gear 5 - 160% (+)60% (Gear 4 + 20%) 



Chain sprockets mounting: 3 notch mounting
Colour:   silver
Flange distance (right):  39 mm
Flange PCD (right):   67 mm
Flange distance (left):   32 mm
Flange PCD (left):    67 mm
Over Locknut Distance (O.L.D.):   139 [EN] mm


There's an operation manual available at https://hfchristiansen.zendesk.com/hc/da/article_attachments/115010677845/Manual_-_QS-RC5.pdf

To operate reverse, you stop the bike, then start pedalling backwards.