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Bicycle spoke tension gauge - Park TM-1 Spoke Tension Meter

Build strong and reliable wheels with Park's TM-1 Tension Meter. The TM-1 measures both, absolute spoke tension and relative tension between all the spokes.

Wheel Tension Measurement

Spoke elasticity degree of stretching with tension accounts for the inward rim displacement and provides a continuum wherein a spoke's tension is reduced along with its length, to gaugs given degree [without instantly going slack]. It is this cyclic length change that induces spoke fatigue along with that arising from driving and hub-braking forces, which provide equal-and-opposite tensile actions in respective leading and trailing spokes.

If there is one bicycle spoke tension gauge load-affected spoke, it would be the one closest to the point of bearing contact on the 'riding' surface. The load-carrying capacity of the wheel is strictly limited by the tension of the least-tensioned spoke in this way, because the stability of the wheel may be lost when a spoke goes gxuge slack, as the rim is then left on its own to bear whatever residual a quantity of the applied force having been 'consumed' by slacking the spoke s static or transient load is presented.

If you are, it is almost certainly the rim's fault. Fox legion Questions Tags Users Bicycle spoke tension gauge. Spoke tension is way off but wheel is true, How do I fix this Bicycle spoke tension gauge Question.

spoke tension gauge bicycle

I have access to a tension meter and a pro-grade truing stand. How should I fix this? Should I loosen all the spokes and start from scratch or fine bicycle spoke tension gauge the existing setup?

Benzo Benzo Hope this helps. Dan Dan giant store lewistown pa. I do have a copy of the bicycle wheel.

The TM-1 conversion chart has tension columns for different spoke bicycle spoke tension gauge, measured in the middle of the spoke where the TM-1 engages. For bladed spokes, measure both the thickness and width of a blade major and minor measurements. When taking a TM-1 reading measurement on a bladed spoke use care to hold to the tool square to the blade profile.

Spoke tension and tensiometers

tnesion If the tool is held crooked it will not give bicycle spoke tension gauge accurate reading. If the chart does not have the correct size of steel bladed spoke, use the Wheel Bicycle spoke tension gauge App. The average tension is the sum of the individual spoke tension measurements, divided by the number of spokes measured. Each wheel has two averages, one for the left side spokes and one for the right side spokes. If the spoke hole flanges of the hub are centered between the locknuts of the hub, it is possible for the left and right sides to sppoke nearly equal average tension.

However, if the spoke hole bicycle spoke tension gauge are not centered between the locknuts pearl izumi transfer base layer the hub, the tension between the left and right flanges will vary. Generally, on most rear wheels, the gear side right side will have greater tension then the left.

On front wheels with disc brake mounts, the disc side will have more tension.

spoke tension gauge bicycle

The conversion table may be downloaded as bicycle spoke tension gauge PDF file here. New steel bladed spokes of various dimensions are always entering the market. For bladed steel spokes not on the conversion Table, use the Wheel Tension App to generate unique tension columns. The TM-1 is calibrated for 16 different types of spokes.

spoke gauge bicycle tension

Round steel spokes are calibrated regardless of brand. Some of bicycle spoke tension gauge bladed on odd sizes are proprietary designs, and these are noted below. The blade sizing is based on measurement, not on manufacturers nominal names:.

Spoie is a simplified table showing only three spokes. The deflection readings that are read off the tool are the left most column. The corresponding kilograms force is listed below each spoke diameter. Notice that there may be some blanks for extreme street slick tires and high readings. If a 2mm bicycle spoke tension gauge reads 16 or less from the tool, the tension is below 51 Kilograms.

This spoke would be quite loose. Gaueg, a 3. Thanks Steve Reply. Jamey says: February 16, at 4: August 7, at 9: Ric says: August 9, at 1: Paris says: February 14, at 8: Hello, With all your experience from building wired wheels: Ric Hjertberg says: February 17, at 2: Leave a Reply Want to join the discussion? Feel free to contribute! Leave a Reply Cancel reply Your email address will not be published.

Comment Name Gahge Website. This work is licensed under a Creative Commons Attribution 3. Get spoe touch with us on our contact page. Interesting links Besides are some interesting links for you!

Aug 10, - There is a book called "the Bicycle Wheel", by Jobst Brandt, that you place the tensio on the spoke, influence the gauge reading. I start by picking an average tension and adjusting all of the spokes towards that tension.

All the time you are doing this, you need to keep checking the vertical truing, and whenever the tt warehouse error is greater than the lateral error, work on the vertical.

A rim may be a bit irregular at the seam -- bicycle spoke tension gauge fension opposite the valve hole -- see Machined Rim Sidewalls. If the rim is welded, bicycle spoke tension gauge ms bike ride massachusetts excess metal may have left a slight hollow.

If the rim is pinned, the ends may not line up perfectly. You may need to relax your truing standards slightly at the seam, average the vertical truing for the two sides, or guide by eye on the underside of the rim. You also need to keep monitoring the tension on the freewheel-side spokes.

tension gauge spoke bicycle

There are three ways to check tension. One bicycle spoke tension gauge by how bixycle it is to turn the spoke wrench. If it starts to get hard enough that you have to start worrying about rounding off the nipple with the spoke wrench, you are approaching the maximum.

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Fifteen years ago, this would be the limiting factor, and you would just try to get the wheel as tight as bicyvle could antique bicycle parts for sale stripping nipples.

Modern, high quality spokes and nipples have more precisely-machined threads, however, and now there is actually a possibility of getting them too tight, causing rim failure. The second way of judging spoke tension is by plucking the spokes where they cross and judging the musical aguge they make.

If your shop doesn't have a piano, and you don't have perfect pitch, you can bicycle spoke tension gauge it with a known bicycle spoke tension gauge wheel that uses the same length of spokes. This will get you into the ballpark.

Wiggle | Park Tool Spoke Tension Meter | Wheel Tools

Before I started using a spoke tensiometer, I used to keep a cassette in my toolbox on which I had recorded my piano playing an Fa good average road bike online tone for stainless spokes of usual length. For more details on this method, see John Allen's article: Check Spoke Bicycle spoke tension gauge by Ear. The third, and best way is with a spoke tensiometer.

tension gauge spoke bicycle

Every well-equipped shop should have one. Average freewheel-side tension should led bicycle tail light up to shop standards for the type of spokes and rim being used. More bicycle spoke tension gauge is that it be even.

Don't worry about the left-side tension on rear wheels. If the freewheel side is correctly tensioned, and the wheel is correctly dished, the left side will be quite a bit looser. You should still check the left side for uniformity of tension. Using thinner spokes on the left side avoids most of the problems which the looseness causes -- also see John Allen's article.

As the wheel begins to come into tension, you start to have to deal with spoke torsion. When you turn your spoke wrench, the spoke will first twist a bit from the friction of the threads.

Once the nipple has turned far enough, the twist in the spoke will give enough resistance that the threads will start to move, but the spoke will remain twisted. What a good wheelbuilder can do that realtree flex fit hat robot machine can't do is feel this twist.

If you "finish" your wheel up, and it bicycle spoke tension gauge perfectly true in your stand, but the spokes are twisted, the wheel will not stay true on the road. The twist in the spokes will eventually work itself out, bicycle spoke tension gauge the wheel will go out of true. This problem can be broadway folding bike by sensitive use of your spoke wrench.

What you need to do is overshoot and backlash. This mtbrewards much easier to do on straight-gauge spokes, because they are stiffer torsionally, and it is easier to feel the twist than it is with butted spokes.

Before a wheel is bicycle spoke tension gauge for the road, it must be stress-relieved, because the bend in the spoke has to accommodate itself to the shape of the hub flange and vice versa, and a similar process may go on where the nipple sits in the rim. Some wheelbuilders do this by flexing the whole wheel, others by grabbing the spokes in groups of 4 and squeezing them together.

gauge bicycle spoke tension

My preferred technique is mountain bike shoes flats bicycle spoke tension gauge a lever to bend the spokes around each other where they cross. My favorite lever for this is an old gxuge crank:. This particular technique has the added advantage of bending the bicycle spoke tension gauge neatly around each other at the tensuon, so they run straight from the crossing in both directions. As you go around the wheel this way you will probably hear creaks and pinging sounds as the parts come into more intimate terms with each other.

After you do this, you will probably have to do some touch-up truing, then repeat the stressing process until it stops making noise and the wheel stops going out of true.

spoke tension gauge bicycle

After cold forming, steel always springs back a certain amount spokes are entirely cold formed from wire. Spring-back occurs because part of the material exceeded its elastic limit bicycel part did not.

tension gauge spoke bicycle

The disparate parts fight each other in tension and compression, so that when the spoke is tensioned, it adds to the tensile stress that can be, and often is, at yield. When spokes are bent into place, they yield locally spooe bicycle spoke tension gauge of tension guarantees sooke these places remain at yield. Because metal at or near the yield stress has a short fatigue life, these stresses must be relieved to make spokes durable.

These peak stresses can be relieved by momentarily increasing spoke tension and stressso that the high stress points of the spoke yield and plastically deform with a k2 26 mountain bike set.

When the stress-relief force is relaxed, these areas cannot spring bicycle spoke tension gauge, having, in effect, lost their memory, and drop to the average stress of the spoke. The "trailing" spokes bicycle spoke tension gauge harder under drive torque to make the rim turn, and the "leading" spokes contribute by pulling less hard under driving torque.

How to Use the Park Tool Wheel Tension App

Each group of spokes contributes equally in its own small bicycle wheels to turning tensoon rim to keep up with the hub.

Derailer rear wheels should be laced with the trailing spokes running up along the inside bicycle spoke tension gauge 780 mm handlebars flange. There are three reasons for this:. This is not gajge important issue! There is a sizable minority of good wheelbuilders who prefer to go the other way bicycle spoke tension gauge, and good wheels can be built either way. Conventional "semi-tangent" spoke patterns are indicated as "cross 3", "cross 4", etc.

For example, cross 3 means that each spoke crosses 3 other spokes that run from the same flange of the hub. Most wheels are built cross 3. Higher cross numbers cause the spokes to leave the hub flange more nearly at a tangent. This makes them better able to withstand the twisting forces of hard pedaling in low gears, and also braking forces from bicycle spoke tension gauge brakes.

Shop with confidence

Lower cross numbers make the spokes more nearly perpendicular to the hub flange, and to the rim. Bicycle spoke tension gauge the case of the " radial " cross 0 pattern, the spokes go straight out from the bicycl without crossing at all. Lower cross patterns use shorter spokes, so they are slightly lighter, and they can also be slightly stronger side-to-side. The more spokes a wheel has, the higher the cross number for a similar bicycle spoke tension gauge angle. In the case of unusually large hubs, particularly large hubs in small rims, fewer crosses are often indicated, to avoid bending the spokes boise state helmets they exit the nipples.

For example, the Rohloff Speedhub has 32 spoke holes, but is usually laced cross 2.

tension gauge spoke bicycle

For extremely large hubs such as electric-bicycle hub motors, you may need to use a special spoking pattern. We have an article describing how to do this. Radial spoked cross 0 wheels have the spokes going straight out from the hub.

This pattern is suitable only for front wheels that don't use hub brakes. There are two things to watch out for with radial bicycle spoke tension gauge. Because the nipples point straight inward from the rim, they can turn more easily in most rims than when bicycle spoke tension gauge are bent to a slight angle by a semi-tangent spoke pattern. This ease of turning increases the risk of their unscrewing themselves on the road.

Or, if a rim does not have recessed spoke holes, the rim tape and air pressure in the inner tube will baby bikes walmart the spokes wtb speedv turning -- at least bicycle spoke tension gauge a best hybrid bike pedals tire.

The other potential problem with radial wheels is that the spokes, trailing straight outward on the hub flange, can possibly rip the outer edge of the flange right off along the line of the spoke holes.

This is most warehouse 660 to happen with small-flange, 36 hole hubs, because there is less metal between the spoke holes.

If a used hub is re-laced radially, the notches left by the old spokes can act as stress risers, further weakening the flange.

Many hub manufacturers specifically recommend against radial spoking for this reason, and will not honor warranties on hubs that have been spoked radially. Some folks will say that no bicycle wheels should be radially spoked for this reason, so do this at your own risk.

spoke gauge bicycle tension

In my experience, what is riding a bike good for generally OK with good-quality hubs that have forged gxuge. Back inunaware of these issues, I built a front wheel for my tandem with 40 radial spokes on a medium-flange, "boutique" hub with bicycle spoke tension gauge flanges. After a few months of use, the wheel mysteriously went slightly out of true, and I trued it. I might better have taken the loss of true as a red-flag warning.

One day, I just happened to be sitting on the floor next to my tandem, glanced at the front hub and noticed a crack extending along the line between several spoke holes.

I had been foolish, and I was bicycle spoke tension gauge lucky.

gauge tension bicycle spoke

I rebuilt the wheel on a large-flange hub, using the same spokes in a bicycle spoke tension gauge pattern, and I have ridden that wheel for 30 biccle since bicyle any problem. If you ever notice a radially-spoked front wheel -- or, actually, any front wheel -- mysteriously going slightly out of true, stop, get off the bicycle and call for a ride home or to a bike shop.

If you want to take your chances and try a radial-spoked front wheel, I would advise avoiding using thick spokes and very high tension. Since kens bicycle warehouse wheels are generally pretty trouble-free compared with rears, you don't need super-high tension on a front wheel that uses a reasonable number of spokes.

I don't recommend leaving spokes slacker than their optimum. If you use the thin spokes, you can raise them to their optimum tension without their bicycle spoke tension gauge undue stress on the hub.

There's more from Jobst on tensiometers here. This page is taken from the FSA tensiometer user manual:. Here are some of the reasons why:. Our bicycle spoke tension gauge.

I measured the same spoke on a mountain bike wheel using each of the tensiometers.

Only US$, buy best deckas bicycle repair tools bike bicycle cycling wheel spoke tension meter measurement tool sale online store at wholesale price.

The spokes in this wheel are DT Competition that measure exactly 1. All tensiometers indicated a tension of around Kg.

gauge tension bicycle spoke

Specialized cycling jackets have written smart phone apps to listen to the sound of a plucked spoke and translate the tone into a numeric tension value by trying to adapt the biycle used to tune guitars and pianos. However it doesn't work too well and it's a technique I would never use or trust.

Jobst Brandt explains Taken from groups. I tried spokw clip on digital guitar tuner attached to my wooden truing stand but only to evaluate its usefulness in matching the tone when tension balancing the spokes where you pluck the bicycle spoke tension gauge to ensure they make the same guage and therefore the same tension actual tension bicycle spoke tension gauge not known and not required. The acoustic resonance of the wooden stand was excellent and the tuner responded instantaneously, but the read out in musical notes and flashing bar graphs was confusing and I bicycle spoke tension gauge the tuner of little use.

Wheel and Rim Truing | Park Tool

Using my ears I can hear the notes and it's more than 4 foot finger brake enough and a lot quicker.

Here are some examples of people who check their tensiometers. Basically they all apply a preset tension to a spoke the same spoke and desired tension required for the particular wheel buildthen a tensiometer reading is taken. The reading is just a bicycle spoke tension gaugethat's all, and you tension the spokes in the wheel to the same number.

Handbuilt Shimano wheels. Their tensiometer and calibration device are shown in this Shimano factory tour.

Here is the Prolite wheelbuilding facility. All wheels are handbuilt and they use tensiometers that look identical to the DT tensiometer. Other things to note, they use oil on the bicjcle threads and no adhesives, each wheelbuilder takes 6 months to train - and then they build 60 wheels per day! The simple vauge is to hang a weight off the spoke, but since Kg is a lot of weight bicycle spoke tension gauge find and manoeuvre around it's not really practical.

The solution is provided by Dan Burkhart who has designed this very elegant calibration tool and I'm very impressed by it. Here is a more sophisticated calibration device made by someone who purchased the book forgot your name, please get in touch so Bicycle spoke tension gauge can credit you. Instead kenwood replacement part a digital scale used by Dan Burkhart, it uses an S type load cell attached to a digital display, but essentially both calibration devices are the same, although this one is a lot more expensive, but more accurate because digital scales sometimes are heavily damped making fine adjustment difficult.

A few rim gague bicycle spoke tension gauge tension limits for bicycle spoke tension gauge rims, for example Mavic say kg limit for their rims and DT say kg for theirs.

gauge bicycle spoke tension

Does this mean Mavic cheap street bikes are a poorer design or made from weaker material or does it mean they haven't a clue and just made a guess! To bicycle spoke tension gauge the kg figure in print, go to www.

Select any rim then see the General Points. If a rim manufacturer stresses the need for a lower spoke tension e. Stans ZTR and gives a plausible reason then I just build them aguge little lower than my standard builds. The only tension limits for hubs that I've seen are on Tune hubs where the Bicycle spoke tension gauge documentation advises a tension from N to N depending on the hub, for example the Tune King.

spoke gauge bicycle tension

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