Otto Tuning System For 10 & 11 Speed Cassettes

Introducing the OTTO Tuning System, an industry first, voice-guided iPhone vision App and tool that enables checking & tuning rear derailleurs in under a minute. You need this for keeping your bicycles shifting perfect. Smart. Quick. Precise!

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.