Shelter Wheel Kit – valve silencer and wheel balancing kit

Shelter Wheel Kit is made of 35 washers that fit snugly over the valve stem, gluing at its base, with an elegant and almost invisible silencing effect.
It’s also great to balance wheels, with an additional vibration-reducing action.

25.00 CHF

Effetto mariposa - Shelter Wheel Kit Effetto Mariposa
35 silencing/balancing elements inside each Kit


  • eliminates valve noises, especially on high-profile rims
  • Shelter washers can be used to finely balance wheels
  • visco-elastic behaviour reduced vibrations


How to silence valves

Shelter Wheel Kit is made of 35 washers that fit snugly over the valve stem, gluing at its base. With minimum bulk and weight, they provide an elegant and almost invisible silencing effect, cancelling unwanted valve movements and vibrations. The re-sealable bag makes sure unused washers retain their properties, when needed for successive applications.
Once Shelter washers are applied on the rim, it’s possible to remove the valve an re-insert it without loosing the silencing effect. This is just one application of our Shelter Wheel Kit, but there’s more.

Nobody would drive a fast car whose wheels haven’t been carefully balanced after mounting tyres on.
Current high performance bicycle wheels, with fancy ceramic bearings, lightweight carbon rims, cannot deliver their full potential if not properly balanced.
It’s an easy task that only requires a Shelter Wheel Kit, a wheel truing stand (or a bicycle turned upside down..), patience and some minutes per wheel.

Effetto mariposa - Shelter Wheel Kit
Much nicer and effective than electrical tape to silence valves on high-end wheels

How to balance wheels

Mount the tyre (and eventually disk) on the wheel, so that the wheel is in its rideable form.

IMPORTANT: if balancing a tubeless wheel, make sure there’s very little or no liquid sealant inside (that can be added later). Liquid sealant spreads while riding without creating wheel unbalance, but it will interfere with static balancing. Place the wheel on a truing stand and make sure it can rotate freely.

  1. With a gentle push, make the wheel spin. After a few complete rotations in the direction of the push, the wheel will enter a pendulum phase where it makes partial rotations, back and forth. Behaving like a pendulum, the excess of weight on the wheel is subject to a restoring force (due to gravity) that accelerates it toward the equilibrium position. Amplitude of swings will reduce until the wheel stops: the lowest point is where the excess weight is.
    PLEASE NOTE: often wheels stop with the valve at the lowest point… but sometimes uneven weight distribution on the tyre or less-than-accurate carbon fiber lay up overcompensate that, and the lowest point is not corresponding to the valve.
  2. Keeping the  lowest point of the wheel as reference, identify the opposite point on the rim (you can find it using a ruler, aligned with the lowest point and the wheel axle) and adhere a Shelter washer there.
  3. Repeat the process from #1. Each time the heaviest point may move slightly (because of friction in the hub), but it will normally remain within a +-10 cm (4 inches) range.

The wheel is balanced when, upon making it turn, IT WILL STOP WITHOUT ENTERING THE PENDULUM PHASE (it won’t change its rotation sense). With each subsequent spin, the lowest point when the wheel stops is a random point on the circumference, changing every time and depending on bearing friction. Washers can be adhered one on top of the other, or side by side, on top of the rim or on its side (depending on rim profile/size).

A good trick, although not always possible, is finding a spoke that’s close to the lightest point of the wheel and cutting the washer on one side, so that the washer can be put around the spoke. Each Shelter washer weights around 1 g. Typical wheel unbalance ranges from 4 to 12 grams.

Visco-elasticity reduces vibrations

The transmission of vibrational energy through any structure can be reduced by introducing visco-elastic materials at discrete points. It’s exactly what Shelter does, contributing to reduce vibrations on very stiff wheels. That’s an added bonus when balancing a wheel with Shelter washers.

Made in Italy.

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6 responses to “Shelter Wheel Kit – valve silencer and wheel balancing kit

  1. Hello my name is Dan Sotelo,

    I’m glad bicycle wheel balance is finally being recognized by racers and bike enthusiast around the world. I know unbalanced wheels is the main cause of the dangerous “HIGH SPEED WOBBLE”. I also know for a fact un balanced wheels takes away all the performance advantages offered by low friction bearings, aerodynamics and low rolling resistant tires. But what I can not understand is how Big Expensive Wheel Brands and all their brilliant high paid engineers go on ignoring wheel balance, as if it is not a problem. You would think if you pay $1,000 ~ $3,000 USD for high tech wheels would be balanced right? WRONG! Instead these Big Expensive Name Brand carbon wheels are so out of balance they are down right dangerous and some shouldn’t even be on the market. What these engineers need to do is go back and take a simple 101 course in basic engineering.

    Here is a good start…

    Newton’s First Law, “INERTIA”. A Mass That Is Set In Motion Will Continue In Motion Unless Interrupted By An “Outside Force”, Or “Oscillation”. Lets look at this Law of Inertia with a bicycle rider and its wheels. The “outside force” is the density of air, so every wheel maker has gone crazy making their wheels aerodynamic, some in a NEST go out on a limb and go with whale technology. Really?.. But how about “oscillation”?! Nothing, absolutely nothing, Nada… Why? Because those brilliant wheel engineers think any small amount of wheel imbalance simply goes away when a rider gets on the bike. If they only did a little research they would discover “it does not go away”. As a matter of fact at high speed 80 KLH / 50 MPH, that little imbalance actually turn into sledge hammers swinging on an both front & rear axles. They would also discover that all that aerodynamic and low rolling resistant technology they brag about, simply goes down the Toilet! Some times I wonder what flows between the ears of these so called brilliant minds in a NEST. But boy they sure know how to hype whale tech, but when it comes to the most basic of technologies for things that spin at high speed, they are clueless.

    So I thank and I commend MARIPOSA, for taking steps to make riders aware of the importance of wheel balance . If you go into my website I have documented the difference between balance vs no balance. I also wrote how speed wobble happens, check it out. dynamicspeedbalance.com

    Dan Sotelo
    Dynamic Speed Balance

    1. Hi Dan, thanks for your kind words… I agree with you wheel unbalance is a problem that has been neglected for too long by our industry. We take a simple but quite effective approach to it, anybody with a wheel truing stand plus our Shelter Wheel Kit can balance her/his wheels. I know your history, being an industry veteran myself. Keep up the good work at dynamicspeedbalance.com!