- - Otto Design Works Launches Derailleur Tuning App

Otto Design Works Launches Derailleur Tuning App


Don’t put up with sloppy shifting. The OTTO Tuning System de-mystifies and simplifies the derailleur adjustment process, giving everyone the power to adjust their bicycle with professional precision.

This smart Tuning System uses the iPhone’s camera and a set of engineered gauges to check shifting alignment, and provides verbal prompts that lead users through any needed adjustments. The OTTO App offers progressive levels of functionality with both CHECK and TUNE options, as well as a multiple bike profile feature. Simple enough for the weekend cyclist or bike racer to use, yet precise enough to earn a spot on the mechanic’s workbench, it’s ideal for pre-ride/pre-race shifting confirmation, after wheel changes, or for regular maintenance.
Features & Benefits

  • Convenient – Do-It-Yourself. Make adjustments on your schedule.
  • Easy to Use – Interactive screen graphics and clear audio instructions.
  • Fast – CHECK confirms your tune quality in under 30 seconds.
  • Complete – TUNE provides barrel nut adjustments in under a minute and complete limit screw verification and adjustment in less than 10   minutes.
  • Precise – Ensures shifting accuracy to +/- 0.125 mm (0.005 inches), less than 1/8 barrel nut turn.


The OTTO Tuning System is a patent-pending system developed by a team of the best in the fields of computer science, photogrammetry, mechanical engineering, and App development.

OTTO operates from the simple principle of ensuring the bicycle derailleur jockey pulley is parallel to and aligned directly below the cassette gear selected at every shift. A vision alignment system built on the iPhone front facing camera platform and Siri’s voice guidance is used in combination with a set of OTTO Gauges to precisely locate all critical components of a bicycle’s drive system.

Each OTTO Gauge is designed with unique features that allow it to perfectly align to its assigned bicycle component. The multidimensional shape of each gauge along with the vision targets allow the gauges to be identified and located in 3-dimensional space with a precision better than 0.001 inches from a single image. The distance and angles between components in the same image can be measured precisely with this method. Comparing positions of the bicycle components over multiple images provides distance traveled and the system records the positions of all major derailleur components at necessary shift points.

Statistical methods are used with the recorded shift positions to find the component location adjustment to restore the bicycle to perfect shifting. Algorithms use this information to calculate the ideal settings which are communicated to the user through the OTTO software. The system will either confirm the bicycle component has been adjusted to its ideal location, or it will provide the user with a refined derailleur adjustment.

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