Stringbike

The Stringbike is a bicycle that uses a rope and pulley drive system instead of a traditional bicycle chain and sprockets.[1][2][3][4] It uses two Dyneema ropes attached to pulleys attached to swinging lever and cam mechanisms, one on each side of the bike. These mechanisms replace the round sprockets found on chain-driven bikes. Unlike some traditional 10-speed gears using a derailleur, there is no slippage when changing gear ratios.[5] The Stringbike uses a 19 gear ratio system with no duplicates and a total gear range of 3.5 to 1. The transmission ratio can be changed with a shifting knob located on the right-side handle grip. Gear ratios can be changed even when the bicycle is almost stationary.[6]

Hungarian designers from the manufacturing company Schwinn Csepel Zrt, unveiled the bicycle in 2010 in Padova, Italy.[7]

References

  1. ↑ "Hungarian Stringbike Prototype Swaps Chain for Wires". Gizmodo.com. 2010-09-19. Retrieved 2010-09-24.
  2. ↑ "‘Stringbike’ wire replaces the bicycle chain". ETA. Retrieved 2010-09-24.
  3. ↑ Coldewey, Devin (2010-09-20). "Hungarian “Stringbike” Reinvents The Wheel". Crunchgear.com. Retrieved 2010-09-24.
  4. ↑ "String the next big thing in bikes".
  5. ↑ Boyle, Rebecca (2010-09-20). "Chainless Bicycle Uses Wire and Pulley System, Eliminating Grease and Increasing Cool Factor | Popular Science". Popsci.com. Retrieved 2010-09-24.
  6. ↑ "Introducing Stringbike: the bike with no chain (w/ Video)". Physorg.com. Retrieved 2010-09-24.
  7. ↑ Mark Brown (2010-09-20). "Hungarian designers debut Stringbike, a chain-free bike". Wired.co.uk. Retrieved 2010-09-24.

External links

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