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Wheel Fanatyk Tensiometers

$285.00

We offer three models, each built on the same platform:

  • Dial—using a Mitutoyo dial indicator, this is ultimate simplicity—most like the first tool Jobst built 40yrs ago. Note: this month (5/23) we upgraded from iGaging to Mitutoyo's 2046S (images are not yet updated).
  • Digital—using an iGaging indicator with 3yr battery. Output data with an optional foot pedal system. This is our most popular model—best value, fastest zero function, largest display, and full data download capable.
  • Digimatic—using a Mitutoyo indicator. Mitutoyo is legendary for reliability but this model does not make a more accurate tensiometer than the two above. Its optional output system is different than our Digital model and its handle carries a scallop cutaway to accommodate Mitutoyo's own plug. 

Aluminum parts are hard black anodized—heavily used tools don't show wear.

Wheel Fanatyk Tensiometers are among the most accurate, durable, convenient, and logical. A breakthrough design—in the 1970’s HP engineer Jobst Brandt created a format that stands the test of time. Wheel Fanatyk’s version is the evolution of Jobst’s original idea:

  • Made to ever-higher tolerances.
  • Employing extra accurate indicators.
  • Offering optional digital output for the electronic models.

Please check our numerous posts about the tool’s details and care. The Conversion Charts cover spokes from the thinnest aero to 4mm thick aluminum, including 13g and 12g steel.

From 2009 to 2011, we offered a model by FSA (since-discontinued). From 2011 we began the Classic digital model. Over 500 tools sold without a return. Beginning late 2015 we added Mitutoyo and in early 2017 we adopted iGaging indicators.

  • Compact design, easy to handle, the gauge is protected from damage or becoming entangled in spokes.
  • Significantly more accurate at low tensions, as found on the left sides of 11-12 speed wheels. This is owed to deliberate design choices. No tensiometer can be equally precise over all tensions, a choice must be made. We much prefer high resolution in the 40-100kgf range which is where tension balancing should be done. Balancing once a wheel is in the 100-140kgf range is monumentally more difficult—like trying to level a foundation once a structure is already on it.
  • Near immunity to spoke thickness due to very low spring force, making spoke deflection more a function of tension and less of mass.
  • Super high stability because #1, there are no pivots/bushings/bearings (outside the indicator) to wear. All movement is very light contact between delrin and polished stainless or anodized aluminum parts that effectively float by each other. #2, the load spring is fully sealed and extremely large compared to any other tool (13 coils, 343mm total wire length). Operating optimally in its best zone, this spring has a practically unlimited lifespan.
  • Tools are offered with or without cases, with a 26 page Owner's Manual, laminated Tension Charts, and a flash drive with supporting materials.
  • Lifetime recalibration privilege.
  • Load is applied by a calibrated spring from Lee Springs, founded in Brooklyn in 1918 by Robert Johannsen, Lee is a global, ISO certified, spring specialist.
  • I personally build, test, and calibrate each individually numbered tool.
  • Both Digital and Digimatic tools support direct data output.

Please see our Library for articles and a movie describing its use. The digital model can output data with dedicated cable. Here is the selection. For a recent review, check here. Download the Dial Tensiometer Owner's Manual here, the Digital/Digimatic Tensiometer Owner's Manual here. Download our latest Calibration Chart) here. You can choose between two protective cases—info here—or none. 

Tolerance specifications for the indicators themselves:

iGaging Digital Indicator

Mitutoyo Dial Indicator

Mitutoyo Digimatic Indicator

A feature chart to help navigate the models.


Collections: Measuring


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