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    Balancing weights

    • Types of imbalance

      Two different types of imbalance can be found on a wheel:

      Static Imbalance

      A correctly balanced wheel can rotate freely around its horizontal axis and is able to stop in every position. If there is a static imbalance, the spot on the wheel with the greatest mass is acted upon by gravity to deflect the wheel downward. Static imbalance always occurs in the center of the wheel and causes it to bounce while driving. The static imbalance can be compensated by applying wheel balance weights on the opposite side of the occurred imbalance.

      Dynamic Imbalance

      Dynamic imbalance is caused by an asymmetric mass distribution inside and/or outside of the rim. The asymmetric mass distribution is only visible during movement when the forces work in different directions and cause the wheel to hop or wobble. To determine a dynamic imbalance the tire/wheel assemblies can be checked on a balancing machine. The dynamic imbalance can be compensated by applying wheel balance weights on the outer and inner side of the rim.

    • Why balancing?

      At a speed of 100 km/h, the centrifugal force of a 10 g imbalance is equal to that of a sledge hammer.

      Double this speed and the forces involved quadruple. Vehicles with poorly balanced wheels become dangerous:

      • More stress on wheel suspension components and bearing points
      • Noticeable vibrations on the steering wheel and in the interior
      • Body subjected to greater physical stress
      • Increased brake wear
      • Increased heel and toe wear on tyres
      • Braking distance increases
    • What is imbalance?

      An imbalance of a wheel occurs when the axis of rotation does not correspond to one of the mass centroid axes.

      Poorly-balanced wheels can generate a critical condition on the vehicle:

      • The steering vibrates
      • More stress on wheel suspension and bearings
      • More noticeable vibrations in the interior
      • Physical strain on the body increases
      • Increased brake wear can result
      • Increased tire wear can result
      • Extension of the braking distance may be the result

      With the balancing weights of HOFMANN POWER WEIGHT the axes are brought back into balance.

    • Effects of imbalance

      What exactly happens in a vehicle which moves with an imbalance and how can the driver detect an imbalance?

      The results of endurance test conducted by HOFMANN POWER WEIGHT are clear after just 17,000 test kilometres. An imbalance has a significant effect on the vehicle. The effects are seen in three areas:

      • comfort,
      • safty and
      • wear.

      Strong vibrations at the steering wheel and inside the vehicle, along with constant humming noises are the first signs of an imbalance.

      After 2,000 km of driving, significant uneven tyre wear is detected on all four wheels. Early repairs may be necessary due to increased wear at the suspension arms, shock absorbers and bearings. In the braking test conducted by HOFMANN POWER WEIGHT, the braking distance of the test Golf moving at a speed of 140 km/h increased by 6 mtr. This can be decisive in case of an emergency situation.

    • Correcting imbalance on tyres and rims

      The imbalance of the tyre and rim is measured by the balancing machine and the problem is corrected using HOFMANN POWER WEIGHT balance weights.

      This workshop procedure involves redating the tyre on the rim until the sources of imbalance on the rim and tyre are opposite each other. The residual imbalance is compensated with HOFMANN POWER WEIGHT balance weights.

      A form defect of the rim can only be compensated by uneven tyre deflection. Smooth running optimisation involves placing the heavy and hard area of the tyre opposite the highest area of the rim. The residual imbalance is compensated with HOFMANN POWER WEIGHT balance weights.

    • The 6 options for balancing

      1. Option

      Balancing using knock-on or safety weights for both levels. This type requires least mass for balancing. Most car manufactures use this option.

      2. Option

      Balancing by using adhesive weights for both levels. The weights are affixed to the inner or outer plane of the wheel in the outer most positions.

      3. Option

      Both adhesive weights are affixed on the inside of the wheel rim. The external balance level is in this case transferred back behind the spokes.

      4. Option

      The outer balancing level is relocated inside and the adhesive weight is attached in the rim centre in the brake disc area. A knock-on or safety weight is attached at the inner wheel rim flange.

      5. Option

      An adhesive weight is used at the outside of the rim. It is attached to the outer most position of the wheel. A knock-on or safety weight is used at the inner wheel rim flange.

      6. Option

      At the outer side of the wheel rim, a knock-on or safety weight is used at the rim flange. An adhesive weight is used on the inside of the wheel rim. The weight is affixed to the rim centre in the outer most position.

    • Why Coating?

      If uncoated balancing weights are mounted on a rim, it may come to contact corrosion. Contact corrosion occurs when metals with different nobility are in close contact. The more noble metal enhances the corrosion of the less noble metal. The condition for this process is a corrosive media between the two metals, like rain water or simple humidity.

      Coated balancing weights preserve any rim from damage due to contact corrosion. The high quality OEM coating protects the weight optimally against environmental influences, even under extreme conditions. See comparison coated / uncoated weights in self-test on the right side. All weights are correspondingly subjected to OEM specifications 480 hours salt spray test according to DIN 9227 and ADTM B 117-73.

    • Installation of knock-on weights

      Selection of the right weight

      Prior to installation, select the appropriate weight from the HOFMANN POWER WEIGHT range on the basis of the rim shape. The choice is determined by the rim design. The rim flange thickness varies (steel rim/aluminium rim) and different rolling processes are used. Put the weight beside the rim flange before installation to check the shape.

      Positioning the weight

      Put the weight to the calculated place. Before knocking the weight on the rim, make sure that the clip is correctly touching the rim flange.

      Applying the weight

      After positioning of the weight, apply it with an adequate tool (such as mounting pliers or hammer). To install the weights, no more than two forceful knocks should be used. A higher number of knocks can damage the coating of the weights.

      Checking the proper installation

      After application, make sure that the weight is securely fitted.

    • Installation of adhesive weights

      Pre-Treating the rim

      Clean the rim thoroughly with a cleaning agent that is compatible with varnish (e.g.IPA 70 %) in order to remove any residual grease, silicone or adhesive.

      Please note: A minimum of 15 °C is required in terms of both the room temperature and the rim temperature.

      Pre-Bending the weights

      Separate the correct gramage (as calculated) from the bar. Mould the shape of the weight to match the rim radius (with protective film).

      Please note: You need to bend the weights gradually, otherwise they will break apart at the joins. You should bend the weight to a little more than the rim’s radius.

      Removal of the protective Film

      Remove the protective film.

      Please note: Do not touch the glued surface after peeling off the film.

      Sticking the weight on

      Attach the weight to the calculated point on the rim, making sure that the weight is distributed evenly either side and the weight is parallel with the edge of the rim.

      Please note: Press down on the weight hard, working from the centre to the left and right. A minimum pressure of 1kg/cm² is required. The angle of the sticking surface should not be higher than 15° to normal.

    • Installation of motorcycle weights

      Compensating static imbalance with spoke weights

      HOFMANN POWER WEIGHT balance weights are used depending on the spoke nipple diameter. The weight is secured to the spoke nipple in the centre of the rim.

      Balancing spoked wheels

      The clip weights for spoked wheels are attached to the spoke nipple using HOFMANN POWER WEIGHT impact the insertion tool. This is the only way to avoid installation errors, as the HOFMANN POWER WEIGHT tool transfers the force necessary for ensuring that the weight is clamped securely and precisely in place. If other tools are used for installation or if the weights used can only be pressed together with a pair of pliers, the weights may work loose and fly off during travel.

      Compensating dynamic imbalance with adhesive weights

      Dynamic imbalance is frequently also referred to as an imbalance in two lanes. The adhesive weight type 706 from the HOFMANN POWER WEIGHT range is ideal for compensating this kind of imbalance. These weights can be stuck onto the narrow rim shoulder (to the left and right-hand sides of the spokes) provided that the glued surfaces are within the permissible inclination angle of 15°. If the glued surfaces exceed an inclination angle of 15°, there is a risk of the adhesive weight losing its ability to adhere due to the centrifugal forces involved.

    • Installation of safety weights

      Insert the Clip

      Use the tyre compression tool or a pneumatic tyre compression tool to squeeze the tyre off at the point where the weight is going to be installed just far enough in order for the rim flange to be exposed. Attach the clip at the required point. Remove the tyre compression tool. The clip will be pressed between the rim flange and tyre, where it will remain secure.

      Mount the weight

      Use the clip fitting tool to lift the clip so that you can push the coated weight body underneath it. Push the weight in the right grammature under the clip. Gradually tilt the clip fitting tool back so that the clip is able to engage in the specially provided recess in the weight body.

    • SPEEDLINER

      What does Speedliner-Technology mean?

      All adhesive bars for passenger cars are equipped with a perforated tape with the innovative SPEED­LINER technology. Thanks to the perforation, the individual segments can be separated easily and without tools. The SPEEDLINER tape is a great relief for working in the workshop mainly because of its residue-free removal during subsequent disassembly of the weights.

      What does the Speedliner provide?

      Removable without leaving traces

      Marking a first, the new adhesive strip has a 5-layer structure. A special interme­diate reinforcement film with exceptional tear-resistant properties ensures strong cohesion within the adhesive strip. Thanks to this long-last­ing bond structure, removing the adhesive weight strip is a much easier job: any foam residue sticks to the rein­forcement film and the adhe­sive weight can thus be lifted off without leaving any traces behind. The SPEEDLINER ® adhe­sive strip* makes not only foam residue on rims a thing of the past, but also the time-con­suming cleaning work using scrapers or aggressive toxic agents that goes with it. As a result, fitters will save both time and money - and vehicle owners will be delighted with a solution that is gentle on rims.

      Higher initial tack

      The adhesive has been opti­mised specifically in line with HOFMANN POWER WEIGHT‘s specifications and not only features a higher initial tack, but also achieves its maxi­mum final adhesive strength even faster than before. This means the adhesive weight is guaranteed to stay in place, even on rims that have not been perfectly cleaned be­forehand. The balance position can still be corrected immedi­ately thanks to the innovative bond structure, meaning that costly and time-consuming readjustment work is no longer an issue - and resulting in hap­py customers in the workshop as well as fewer complaints.

      Clean tearing edges

      The optimised SPEEDLINER ® foam can now be torn even more easily than before and leaves a clean tearing edge when individual segments are separated off. Combined with the grid web technology used in the HOFMANN POWER WEIGHT adhesive weights and the perforated liner, this feature makes fitting work considerably simpler. What is more, it allows for an even bigger reduction in the amount of adhesive weight scrap pro­duced, as damage to the liner is prevented when separating off individual segments.

      Easy liner removal

      Stronger material has been used to create the new protective film (known as the liner). This allows the liner to grip more easily, which in turn makes removing it a quicker and more straight­forward job for the fitter.

      Download Speedliner Flyer

    • Balancing compound

      How does balancing compound work?

      In a running tire the balancing compound is dispersed along the tire walls due tothe centrifugal force. With increasing speed, imbalance of the wheel assembly (heavy spot) will cause vibrations like bouncing and wobbling. At the same time the higher speed will also cause the centrifugal force to disperse the material in the tire and automatically push the compound opposite to the heavy spot, compensating the vibrations. As the compound can fl ow freely in the tire, it will constantly adjust to shifts in forces caused by changed imbalances, speeds and road conditions, guaranteeing an always smooth ride.

      What is fusion technology?

      FUSION TECHNOLOGY * – The intelligent balancing compound:

      The secret of the innovative Fusion Technology is the different size of the balancing material. The larger red kernels concentrate in the center of the tire and dampen the static imbalance. The smaller blue kernels are moving to the outside of the tire and compensate wobbling which is caused by dynamic imbalance. The result is a smooth ride for the complete tire life.

      Benefits of balancing compound

      Quick and easy balancing

      No balancer required, tear open and into the wheel. Pre-packed bags mean low labour costs, no extensive training or experience required.

      Increased fuel efficiency

      Smoother ride and reduced rolling resistance mean longer tyre life, better tread and contact to road, making you more efficient.

      Prolonged tyre life

      Longer lasting tread and even tyre wear through fewer vibrations keeping your tyres running smoother and cooler, ultimately lasting longer.

      TPMS safe

      Specially coated compound has no adverse effects on TPMS sensors or inner tyre liners, high quality metal valve cap and a special core in every bag, protecting your valve.

      More driving comfort

      Vibration dampening increases comfort, causing less exhaustion for driver. Fewer vibrations for load and driver mean both arrive fresh.

      Environmentally friendly

      Lead-free, cost effective solution to balance all your wheels and almost all rim types, with no rebalance necessary saving dozens of wheel weights over a tyre life.

      Why balancing compound of Hofmann Power Weight?

      Full Product Program from the market leader

      As the market leader in wheel balancing, we are proud to also offer a premium solution for vibration dampening through in-tyre compounds. We are the only manufacturer in Europe offering a full spectrum of heavy-duty knock-on and adhesive weights as well as an own line of vibration dampening products for in-tyre use.

      A strong brand

      Our premium product and packaging is paired with a strong brand. HOFMANN POWER WEIGHT is known as the most important supplier for wheel weights to vehicle manufacturers worldwide.

      Garage optimised packaging

      The unique dispensing box, with its small footprint can easily be stored close to the balancer, no walking back to get product from the shelf. Bags can be dispensed from the front, while it opens from the top with a reclosable and removable lid.

      Smaller box quantities

      With 8-16 bags per master box, a fourth of what competitors pack into master boxes, inventory can be managed more easily, binding less capital. The lower cost per box makes the product attractive even for shops without HD specialization.

      Attractive product design

      Premium product with its unique two colour design, paired with a high quality print and red and white HOFMANN POWERWEIGHT visual on boxes and bags maximise brand recognition and facilitate repeat business.

      All-in-one bag

      Each bag contains everything you need for your job, each has a filtered valve core and valve cap sealed into a separate compartment at the top.

      Easy to open

      Our perforated paper bags are easy to tear and incorporate a funnel-like opening to minimise spills. The single paper bag design reduces waste and is easy to recycle compared to competitors double plastic bag packaging.

      Instructions on every bag

      Independent from language barriers, instructions on every bag in the form of pictograms show how the balancing compound is applied.

      High quality components

      Valve cap and filtered valve core provided in the bag are high quality components with red high temperature resistant seals. Each valve cap is marked with a clear logo, indicating the use of balancing compound in the tyre.

      Download Balancing compound advantages.

    TPMS

    • Why TPMS Service Kits?

      When a tyre is replaced on a vehicle without TPMS, it is normal to replace the rubber valve. In the case of a direct TPMS system, some components of the sensor must also be replaced. Every time a tyre is replaced, the suitable TPMS Service Kit must be used to replace the wear parts (nut, O-ring, nickel plated valve core, cap). This ensures safety, prevents breakdowns and avoids larger and more expensive consequential damages (For example a complete replacement of the sensor because the valve core is stucked by corrosion).

      CAUSES FOR MALFUNCTIONS:

      • Corrosion of metal components
      • Embrittlement of rubber seals

      POSSIBLE CONSEQUENCES OF MALFUNCTIONS:

      • Damage and replacement of the complete sensor
      • Loss of tyre pressure
      • Flat tyre
      • Losing control over vehicle
      ACCORDING TO THE AUTOMOBILE MANUFACTURES‘ SPECIFICATIONS, TPMS-SERVICE KITS MUST BEREPLACES ON EVERY TYRE CHANGE – FOR YOUR OWN SAFETY!
    • Why Service Kits from HPW?

      100 % vehicle coverage

      Hofmann Power Weight is the only supplier providing a 100 % coverage for all European vehicles from 2014 on.

      Highest OE-quality

      Spare parts in OE quality guarantee best work results and maximum reliability even under extreme conditions.

      Latest corrosion protection technology

      All metal components are treated with the latest corrosion protection technology for highest demands.

      Reduced stock-keeping

      Demand-optimized box filling for efficient warehousing.

    • Components of a Service Kit

      A TPMS SERVICE KIT USUALLY CONTAINS THE FOLLOWING COMPONENTS:

      • 1 Valve nut
      • 2 Valve cap
      • 3 Valve core
      • 4 Seal
      • 5 Some Service Kits also include O-rings in 4 different colours*

      * The position of the O-Ring is on the outside of the nut. Each colour describes the position of one wheel. The combination of the position of the wheel and the colour of the O-rings as follow: Green = Front left, Yellow = Front right, Red = Rear left, Black = Rear right

    • TPMS Application chart
    • TPMS Service Kits Assembly Instruction
    • Instruction Video
    • Technical product information