A wheel with low tension is adjusted by simply tightening the spokes. Begin your corrections at the valve hole to give yourself a reference point. If adjusting a wheel with different bracing angles, adjusting tension may change the dish of the wheel slightly. You can attempt to compensate for this by making a smaller adjustment on the side with a larger bracing angle.
You will be able to see how much your work has adjusted the overall tension. If necessary, repeat the process, making small, even adjustments to the entire wheel and checking your work with the TM-1 until you have achieved proper tension. The same basic process applies: make small, even adjustments to the entire wheel and re-check using the TM You may have noticed that as you take readings that there is some fluctuation between spokes on the same side. If these vary widely, the wheel can benefit from tension balancing, where you tighten and loosen individual spokes to even out the tension of the wheel.
Generally we do not recommend manual readjustment of tool. If the tool is worn or damaged and appears to be inaccurate, return to Park Tool for recalibration. Park Tool will recalibrate and return the tool for a reasonable charge. It is recommended for professional mechanics and service departments use a non-riding wheel to help in tool calibration.
Remove the axle from a wheel so that it is not rideable. Mark a spoke as a reference spoke and measure this one spoke. Write the date of the measurement directly on the rim. This same spoke can be used to double check the original calibration.
If the tool is reading low, take the tool off the spoke and turn it upside down. Remove the spring from the fixed moving stud, and then thread the adjusting screw inward toward its stud.
This will decrease tension on the TM-1 spring, resulting in a higher deflection reading. If the TM-1 is reading high, increase tension at the adjusting screw.
Wheel Dishing Centering View Article. Seller assumes all responsibility for this listing. Item specifics. Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is Read more about the condition Used: An item that has been used previously.
The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See all condition definitions opens in a new window or tab. Park Tool. Park Tool TM Tension Meter. Known for its practicality, robustness and lightweight construction, when calibrated on point, it fairly accurately and reliably measures the spoke tension of a wheel. Park Tool is aware of their tool coming out of calibration as they say: "Over time, especially with the repetitive use experienced in a shop, the spring on the TM-1 Tension Meter can come out of adjustment or wear out completely, causing the TM-1 to come out of calibration and no longer read spoke tensions correctly.
However the spring wearing out as they state is considered as wear and tear and as such not covered by their warranty. But nevertheless they still offer aftersales service and repair of their tool. Since they offer a limited number of third-party service centres around the world, for some Park Tool TM-1 users, a self service becomes the only sensible option for their tool maintenance.
As shown on the image below, the client made a remark that the triangle tip of the scale is leaning towards the negative value of -1, when the spoke tension meter spring is released. Looking at my own Park Tool TM-1 tension meter, I should assume this must probably be a standard flaw of this tool, but nevertheless, I was able to move the triangle tip a little towards the zero value 0 on the scale.
However, this does not affect readings accuracy of the tool, it is more of an aesthetic defect. Packed with convenient cross-spoke tension chart, Park Tool TM-1 is a great time saver. Just find your spoke dimension in this colourful table and you are good to go as all the reference numerical spoke tensions are listed corresponsive to the readings on this spoke tension meter scale.
But is the tension meter still accurate and reliable to the point after some moderate use? And if not, how does this wear degree affect deviations in readings from the actual tension, put on spokes. At this point, my own spoke tension meter calibration device comes in action. Adjusting a spoke tension on a spoke to match almost the exact value you are looking on the Park Tool TM-1 scale is a pretty straight-forward process. Note: For more information about tension meter calibration process, proceed to the following article: Tension Meter Calibration: How to calibrate a spoke tension meter and make your own spoke tension chart.
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