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Park Tool Spoke Tension Meter - TM-1

4.7 out of 5 stars 98 customer reviews
| 6 answered questions
List Price: $74.95
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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
84 new from $71.96
$73.46 & FREE Shipping. Details Only 1 left in stock. Sold by International Coffee & Books and Fulfilled by Amazon. Gift-wrap available.

Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and .

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Frequently Bought Together

  • Park Tool Spoke Tension Meter - TM-1
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Total price: $142.68
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Technical Details

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Product Details

  • Product Dimensions: 10 x 6 x 3 inches ; 11.2 ounces
  • Shipping Weight: 11.2 ounces (View shipping rates and policies)
  • ASIN: B013T0L556
  • Item model number: Park Tool
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (98 customer reviews)
  • Amazon Best Sellers Rank: #18,468 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
    • Product Warranty: For warranty information about this product, please click here

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Customer Reviews

Top Customer Reviews

4.0 out of 5 starsThe best tool you'll never really "need..."
By Nathaniel Allen TOP 500 REVIEWER on January 29, 2011
Size: One SizeColor: One Color
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.

It's possible to go around and around and around and around again, a quarter turn tighter here, a quarter turn looser there, in an attempt to achieve "perfect" uniform tension as indicated the the Park's scale. Again, a huge time waster.

Here's how I prefer to use the tension meter: leave it in the box initially. Lace the wheel, lightly tension, stress relieve the spokes, build the tension and true with care. All the while, pluck the spokes and listen to the tone. Pull the tension meter out to verify final tension, but then trust your ears while plucking your way around the wheel looking for noticeably high pitched (over tensioned) or low toned spokes.Read more ›
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5.0 out of 5 starsNecessary and affordable
By Vernon Forbes on February 1, 2013
Size: One SizeColor: One Color
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 both 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 riding. This is prevented with UNIFORM spoke tension. The spokes should all have the same tension when plucked. You cannot determine the tension a spoke is at from the tone; on spokes with different lengths, the same tension will give different tones.

The key to wheel building is adequate, uniform spoke tension. While you can pluck to determine uniformity with a Fender 351 Classic Celluloid Guitar Picks 12-Pack - Shell - Heavy you need a tensiometer to determine the ADEQUATE level of tension. Some reviewers think a tensiometer is too awkward and unnecessary. IN PRACTICE, YOU DON'T MEASURE THE TENSION ON EVERY SPOKE IN THE WHEEL.Read more ›
2 Comments 33 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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5.0 out of 5 starsNo More Guessing and Hopefully No More Broken Spokes
By D. J. Mccartney on May 7, 2009
Size: One SizeColor: One Color
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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4.0 out of 5 starsA good tool for the price
By Brian Nystrom on September 3, 2011
Size: One SizeColor: One Color Verified Purchase
I purchased the Park TM-1 to replace a Wheelsmith tensiometer that's woefully inaccurate and for which Wheelsmith no longer offers a calibration service (shame on them!). The ergonomics of the Park tool are considerably better, making it more comfortable to use. Its repeatability is good, as long as you develop a consistent technique. The readings you get will vary depending on how quickly you release the lever. I suspect this is because the tool uses solid posts instead of bearings to support the spokes; the friction between the spoke and the posts creates this inconsistency. However, once you develop a consistent technique, you'll see repeatable results, it just takes a bit of experimentation. Switching to bearing supports would be a nice improvement that wouldn't add much to the cost.

It could also stand to have a rubber bumper of some sort to absorb the impact that occurs if the tool slips from your grasp and snaps open. No matter how careful you are, this will likely happen occasionally and it would be nice if the tool didn't beat itself up. I'll probably install a bumper of some sort on mine.

The included spoke chart is very comprehensive and the attached spoke gauge is handy to have.

Considering the bargain price of this tool compared to those from DT, Hozan and FSA, it's a great value and it will definitely help you to produce high-quality, consistent wheels. Overall, I'm pleased with its performance for the price.
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Most Recent Customer Reviews

5.0 out of 5 starsProfessional quality home mechanic tool

Very nice little tool to assess and set spoke tension when building or truing wheels. Don't build a wheel without it.

Published 8 days ago by Captain Neal
5.0 out of 5 starsGreat quality from Park Tools

Nice to have to keep an eye on your rims

Published 8 days ago by Glen Brown
5.0 out of 5 starsA GREAT tool and absolutely worth the money

A GREAT tool and absolutely worth the money. Went around the wheels front and back and obtained an average. Found some spokes to loose and some to tight. Read more

Published 17 days ago by Jon Jones
5.0 out of 5 starsThe best

The only tool to use for spoke tension

Published 27 days ago by Bissell J. Smith
5.0 out of 5 starsit's fun to use and is really empowering to allow you ...

That's a fabulously well designed and simple to use tool. Used with the online app, it's fun to use and is really empowering to allow you to maintain your wheels in the best and... Read more

Published 1 month ago by mr. nobody
5.0 out of 5 starsNothing better for the price. Calibration needs to be better addressed...

I am an obsessive wheel builder. I am not a wheel harpist. (Determining tension by pluck tone and intuition. Read more

Published 2 months ago by crewdoglm
4.0 out of 5 starsVery useful tool

I can't vouch for the accuracy but this is a very useful tool when building a wheel. I've read on some forums that actual tension readings may be off by about 10% unless you... Read more

Published 2 months ago by Jazzguitarist
5.0 out of 5 starsFive Stars

As Advertised works Good

Published 3 months ago by Keith Neely
5.0 out of 5 starsNESSESARY

This product has changed my world as far as DIY wheel builds go. Remember to do a little at a time. Read more

Published 5 months ago by Kevin McLane
5.0 out of 5 starsIf you're going to build your own wheels, you ...

If you're going to build your own wheels, you gotta have one of these. Very simple to use. Comes with a tension chart for all the spokes you'll ever use.

Published 5 months ago by Jack

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