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Measures the absolute tension of each of the spokes in a wheel
The TM-1 works on nearly any bicycle spoke
Used for building or truing wheels, diagnosing wheel problems, or assembling new bikes
Measures relative tension between all the spokes in a wheel
The key to wheels that are strong and reliable is having spokes that are properly and uniformly tensioned. The TM-1 Tension Meter accurately and reliably measures the absolute tension of each of the spokes in a wheel, as well as the relative tension between all the spokes in a wheel. Easy to use and priced affordably, the TM-1 works on nearly any bicycle spoke¿no matter what the diameter, material, or shape. Not just for the experienced mechanic, the TM-1 is for anyone building or truing wheels, diagnosing wheel problems, or assembling new bikes. It¿s a tool that belongs on every workbench.
Most Helpful Customer Reviews
I guess I'm what you call a "book learned / internet learned" home wheel builder (as opposed to having been mentored in a shop environment), and on my first half-dozen builds over many years, I got along just fine without a tension gauge. The most important factors in building a reliable wheel have proved to be sufficient, even tension. (It took me only one attempt to figure out how horribly unreliable an undertensioned wheel could be!) But... with that number of wheels to my name, I was always curious what tension I was ultimately stopping at. So I've had this meter at my side for maybe about five years now.
If you're the least bit neurotic or OCD, this tension meter will simultaneously be the best and worst friend in your toolkit. It's possible, for instance, to perform your initial lacing to a low tension value, rather than driving the nipples to where the spoke threads just disappear below the nipple. Possible, but a huge time waster.
I have built wheels for 7 shops in 4 states since 1979. A tensiometer is unnecessary for wheel repair but is invaluable for building any new wheel. I check the tension on every wheel I build. Spoke tension became more important after 1981 when Brandt showed that spokes fail from fatigue instead of exceeding their elastic limit. It still sounds ironic to say but spokes break from inadequate tension causing fatigue failure. Having ADEQUATE, UNIFORM tension is the key to building a wheel. Spoke manufacturers tell you the tension to use in kilograms of force. You need a tensiometer to be able to follow the manufacturer's recommendations.
It is impossible to determine spoke tension by how hard it is to turn the nipples because they press into the rim adding drag when you try to turn it. A spoke tensiometer is the only way to know.
The other problem with building wheels is sudden wheel collapse where the wheel unexpectedly assumes a potato chip shape while you are...
The TM-1 Spoke Tension Meter works very well. I commute by bike every day to work, and among my three road bikes that I rotate through (set up differently for weather and load), was popping spokes to the tune of about 1 or 2 a month, mostly due to what I perceive to be overtorque on some of the spokes. Now I have torqued my spokes at the lower end of the recommended range and have yet to pop a spoke, and it is reassuring to know that they all are torqued to the same value. It does take a little bit of give and take to get the wheel trued, but with just a little bit of effort you can adjust the tension to the correct range, then make minor adjustments of individual spokes to get the wheel to spin true. You end up with a much more consistent torque range throughout the entire wheel, which eliminates overstress (hot spots) on overtorqued spokes.
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Please note that this item is imported from the USA, and is designed to be used in the USA. In addition, if the unit is powered it will come with a US plug and an adapter/transformer may be required. Please click here for more information on power requirements, or check with us if you are unsure or need any assistance!
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