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Cycle Monkey

Internal Gearing Specialists, Bicycle Distribution & Service Center

Rohloff-Equipped, Belt Driven Firefly Custom Titanium 29er Mountain Bike

Signature Cycles (NYC) bike shop coordinated with Firefly Bicycles (Boston, MA) to design this 29er mountain bike. The customer was looking for a high-performance, low-maintenance bike to spend more time riding and less time fixing his bike.The integrated Rohloff SPEEDHUB and Gates Carbon Drive belt system provides a virtually maintenance-free drive train. This combination requires only an annual oil change for the hub, but no other regular maintenance or lubrication. With the belt drive system projected to last over 10,000 miles, this drive train will provide many years of reliable service.To accommodate the belt drive system, Firefly used a Paragon Machine Works titanium tube splitter on the right seat stay. This provides a clean and simple solution to insert the belt into the frame.Finishing details include Rohloff-specific cable routing for a clean look and Paragon Machine Works Rocker adjustable dropouts to tension the belt.Build details

  • Frame: Firefly custom titanium
  • Fork: Fox Shox F29
  • Headset: Chris King Inset
  • Stem: Thomson X4
  • Seatpost: Firefly titanium
  • Shifter: Rohloff
  • Front Hub: Chris King ISO 15mm
  • Rear hub: Rohloff SPEEDHUB 500/14
  • Rims: No Tubes Arch
  • Tires: No Tubes Crow
  • Cranks: Shimano XT
  • Chainring: Gates Carbon Drive Center Track
  • Chain: Gates Carbon Drive Center Track
  • Brakes: Shimano XT
  • Pedals: Shimano DX
  • H2O Cages: King Cage titanium