The smarttune 5/16” (the second smallest in the smarttune range) is designed specifically for sports and day boats. In minutes it easily swaps in for your existing turnscrew (forestay/backstay/shrouds/diagonals), and moments later can be displaying live load data on your phone wirelessly, or (with the addition of a Cyclops Marine Gateway) on most on-board electronics systems.


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Next Generation Load Sensing for Standing Rigging on Sports and Day boats

  • smarttune has been precision designed for low weight, low windage. 
  • Factory calibrated and accurate to +/- 1% of maximum working load. 
  • Durable and waterproof to beyond IP67. 
  • Powered by CR2032 batteries.
  • Pair with smartfittings app for logging and analysis.
  • For display on a smartphone, recommended range of up to 15m while sailing.



Thread Size


Metric Thread


Breaking Load

2.45 tonnes


112 x 55 x 18 mm

Device Weight

180 g