Make-a-tensio

Refitting a tensio to work with Wheel Analytics can be pretty easy. In this video we’ll refit a typical tool, this one imported from Asia but similar to tensiometers from a dozen or more manufacturers. This particular tool is well-constructed with a ball bearing pivot. The factory dial indicator is its weakness but we’ll see it replaced with a digital part.

The indicator is released by loosening a single set screw on the back of the tool. With the indicator removed, the stem is measured. There are two common sizes — 9.5mm (3/8″) and 8mm (5/16″) — and this tool uses the latter. Mitutoyo 543-781B features an 8mm stem so it’s a direct replacement. Insert into the bore and secure with the same screw. Job done.

Compatible indicators are commonly available in most global markets or available direct from Islandix.

Tensio support

Wheel Analytics includes two modules for interfacing with bicycle tensiometers. This feature is evolving and will be the subject of a free update available next month.

One frequently asked question concerns tensiometer support. Wheel Analytics works with any tensiometer equipped with a Mitutoyo or compatible digital indicator. Many tensios can be retrofitted with such an indicator, allowing you to continue using the tool you already own and enjoy. Islandix supplies indicators for this purpose with no extra shipping cost. Please inquire for specific advice or to order indicators.

A related question concerns available tensiometers that are compatible out of the box. There are a few on the market. The Wheel Fanatyk tools pictured above are an Islandix favorite. Choose the Digimatic version for compatibility. Wheel Fanatyk tensios are calibrated to a universal standard and this information is preloaded into Wheel Analytics as a default setting. On the other hand if you prefer a more traditional tool, IceToolz makes one featuring a Mitutoyo indicator.

Update: revised geometry on new Wheel Fanatyk tensiometers now requires a low-profile data cable, also available from Wheel Fanatyk.