BST Frequently Asked Questions

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The questions below are the most popular questions we receive. If your question is not listed, please use our Contact Form or the Live Chat feature at the bottom of this page. Click Expand to see all FAQ’s related to BST Carbon Fiber Wheels.

BST Carbon Fiber Wheels (37)

One of the good things about carbon fiber is that you can see damage immediately.

The first test is whether the tire is holding air. If it is not, the wheel is likely damaged beyond repair. Major damage will show cracks through the rim and the wheel will obviously not be usable.

If it holds air, remove the tire and check the wheel carefully. Damage can be superficial in which case minor cracks will be visible in the clear coat, and the wheel is usable. If the cracks are deeper and the layers of carbon fiber appear to be torn, this is more serious and the wheel should not be used.

Please feel free to send us photos to help assess the damage for you.

Because the Rotobox wheels come standard with anti-slip treatment applied to the front and rear wheels from the factory, we will quote them verbatim: Mount the tires using plenty of lubrication and inflate to 3 Bar/43 PSI – (MAX pressure 4 Bar/58 PSI), so the tire sits firmly in it’s place. The same procedure would be followed using BST wheels with anti-slip. Brock’s Performance stocks RuGlyde, an excellent tire mount lubricant – see link below.

Ru-Glyde Tire Mounting Lubricant – 8 oz Bottle
Excellent tire mounting lubricant from general street to the most powerful drag applications. Lubes then gets ‘tacky’

Wheels manufactured from metal are either cast, forged, machined, or manufactured as a combination of the three processes. Aluminum wheels have been around for many years. They are relatively easy to manufacture and also relatively cheap, but they are heavy because of the density to strength ratio of Aluminum (how much strength you can get for a kilogram of Aluminum). To improve the weight you can either choose a material that is lighter or one that is stronger, or one that is lighter and stronger. Using magnesium, which is lighter but not necessarily stronger, you can improve on weight slightly.

The problem with magnesium is twofold: first – its fatigue properties are poor and so are the corrosion properties, so a wheel may not last very long even if perfectly cast and machined. The second problem is worse – very often micro-porosity occurs during the casting process, which has a negative impact on both fatigue life and corrosion. So magnesium wheels can be nice and light but may not last very long, sometimes less than a racing season. This makes magnesium wheels good for racing but unattractive to the man in the street. The only solution is to find a material that is lighter, stronger, fatigue free and corrosion free – Carbon fiber. As an engineering material, carbon fiber is far superior to Magnesium or Aluminum alloys.

Check out the reviews/news articles posted on our webpage: http://blog.brocksperformance.com/bst-wheel-information-page/

While we understand that some of our customers have used Dynabeads, the long term effects of the ceramic beads against carbon fiber have not been thoroughly tested and may void the factory warranty. Please see the Blackstone TEK. (“BST”) Warranty Disclaimer for additional information: http://blog.brocksperformance.com/blackstone-tek-bst-warranty-disclaimer/

Yes you can. Make sure that the warmers and regulators are operating correctly. Do NOT use enclosed tire warmers (side covers that blanket the entire wheel) as this pushes the temperature higher than the specification given on the warmers and on the wheels. Carbon fiber wheels are designed to operate up to 176º F which is more than adequate and will work within the requirements of the tire warmer specifications. If used under normal circumstances, a tire warmer set at 194º F will warm the tire accordingly, and the wheel itself will not achieve more than 122-140º F. Carbon does not radiate the heat as quickly as metals, so there is no need to be overly-aggressive with the warmer settings.

BST wheels are made specifically for a type and model of bike. The manufacturing process ensures that the wheel runs absolutely true on its own hub which has a unique fastening system and may not be tampered with. You cannot change the hubs. Your best solution is to sell your wheels – either separately or as a value-add to your current motorcycle – and buy new BST wheels for your new bike. Update: BST has introduced a rear wheel with hub adapters to allow use on multiple makes/models – see www.BrocksPerformance.com for details.

We achieved TUV certification for the facility and for the wheels – GSXR1000 front and rears, Ducati 916-998 series and 748 front and rears. TUV requires certification per model. BST wheels passed every test. However TUV are currently writing new specifications for carbon wheels and all manufacturers will have to have their carbon wheels tested to the new specifications when this process has been completed.

Because all of the items you mention bolt directly to the OEM rotor (rear) or carriers (front), no hub modifications are required to the BST wheels.

This allows the use of all year ZX-14 wheels on the 2013. The same was true for the 2012, which carried the identical mechanical components for use with its KTRC system. The anti-lock braking addition is simply a software/firmware enhancement for 2013.

No. Please click here to view the Blackstone Tek. (“BST”) Warranty Disclaimer: http://blog.brocksperformance.com/blackstone-tek-bst-warranty-disclaimer/

We do have some suggestions if you encounter a road hazard, crash, damage or theft and it all boils down to PROPER DOCUMENTATION BEFOREHAND:

1. Pothole Damage – D.O.T. Claim by State: Most states have a fund set up specifically to address these types of issues. It’s an uphill battle to collect in most instances, but it is possible. Document pothole ASAP (immediately and safely before it is filled, etc…) Photograph and detail with as much info. as possible i.e. location, size, depth (show a tape measure in the hole,) etc.

See Related Link below for State of Ohio Example/More Info. Please Note: Your State procedure may differ.

2. Pothole/Road Hazard/Curb/Etc… – Insurance Claim: The job of insurance is to repair your vehicle to its previous condition ‘before the accident.’ If you carry a collision policy, companies like State Farm will usually consider striking a large pothole/curb (or other type of road hazard) a collision, and repair or replace your damaged wheels. The key is complete documentation. Keep all receipts showing purchase date, installation date, value, etc… Take photos and videos of your bike and wheels. Store them in a safe place (even send copies to your insurance agent.) Notify your insurance company of your modifications before you go for a ride. If you don’t give them any excuses, the process can be far less frustrating.

3. Stolen: See Note 2… If your bike is customized, it is your responsibility to prove the value of your customization and that that your work is current. If you are unable to do so at the time of your claim, they will work off of NADA book value.

4. Please note that all BST wheels are marked with a unique serial number and mfg. date. Document your front and rear numbers for reference.

There is no need to send your wheels in for inspection unless there has been some sort of trama that the wheels were involved in, such as a crash.  We do recommend doing a visual check every so often.  Here is a link for some things to look for when doing the inspection.

BST Carbon Fiber Rear Wheel Inspection Document

Here is another link to a bunch of information on the BST wheels, frequently asked questions and things like that.

BST Wheel Load Rating Information

The hubs are attached to the carbon fiber wheel using a unique fastening system combining high strength aerospace fasteners with mechanical locking mechanisms as well as high strength aerospace adhesive.

For road use, use the same tire pressure that you usually use. For suspension – if the suspension is working OK for you before you put on the BST wheels, you should not have to make adjustments. The carbon wheels make a huge difference to the smaller bikes so there are some things you need to know. If you get chatter on fast corners once you change to the carbon wheels that were not there with metal wheels, you should be able to tune it out with suspension settings, or you could add weight to the swing-arm. The reason is simple: the total weight working on the shock is a lot less and hence you are not working within the range of the rear shock. The shock works at about 5 – 10 hertz and the wheel at +- 30 hertz so the natural frequency can chase the chatter on the smaller bikes. By putting weight on the swingarm you have the same weight working on the rear shock while gaining the advantage of the much lighter rear wheel.

We have about ten 125 Hondas that run the wheels in South Africa and they also tend to run lower tire pressures cold as the carbon does not transfer heat very well and they can get a bigger contact patch with lower pressure.

BST Carbon fiber wheels have undergone an intensive program of very stringent testing to verify their design and to confirm their strength and durability.

A designated test body in the UK performed the following tests and all tests were conducted on a single prototype wheel.

It is important to note that this ‘single wheel test’ is not usually the case when testing a metal wheel, since due to metal fatigue behavior of a single wheel would not last throughout all the tests. To allow for this weakness in metal wheels, the test regulations actually specify that one new wheel for every test is permissible, whereas in this case a single BST wheel withstood ALL tests. A sample of test results is given below, tests and forces exerted depend upon requirements of the testing body (eg TÜV) and the wheel (front or rear).

Cornering fatigue: 1,000,000 cycles at 530Nm
Radial fatigue: 3,200,000 cycles at 6082Nm
Torsional fatigue: 1,000,000 cycles at 890Nm
Impact test: 337.5kg from 150mm (JWL)

The front wheel was designed for a 150kg static load and the rear wheel for a 250kg static load (this translates into a bike with a total dry weight of up to 400kg). Modern sports bikes normally weigh between 160-220kg and race bikes rarely exceed 170kg, so these static load design parameters comfortably exceed normal conditions.

Use warm water with a mild cleaner, avoid petroleum or alcohol based products and don’t use aggressive or abrasive cleaners. A mild de-greaser will remove any oil. You can polish them with any normal polish for a painted surface. If you want to refurbish the wheels to get back the gloss and shine, then use a polish with a rubbing compound in it, and complete the process with a finishing polish.

A normal good quality shop will be able to fit the tires. Use a tire machine, and turn down the clamping force a touch. Don’t use too much mounting fluid (or soap) as this can make beading more difficult.

1. Yes.
2. Yes
3. Yes- but our Brock’s Performance stickers are on top of the clear coat… peel them off if you don’t like them. The BST stickers are under the clear and are not removable.

Please e-mail any BST related information to our direct contact address: BST@BrocksPerformance.com

We do not, sorry. But, we would recommend a precision ground, steel shim from a supply company such as McMaster-Carr.

We supply industry leading Worldwide Bearings ceramic or steel bearings with every order of BST wheels. These bearings are packed with Mobil® Polyrex® light weight aerospace grease. It is not uncommon for the bearings to squeeze out a small amount of grease during the first few hundred miles of operation. Wipe up any excess grease and once properly broken in the bearings will cease to push any grease out. If you have any further questions please contact our sales and technical staff at 937-912-0054 or sales@brocksperformance.com

Hubs can often be re-used if they have not been damaged. If the carbon fiber is damaged beyond repair, you can cut the spokes close to the hub and send the hubs to us. We will likely be able to fit them to new carbon parts, giving you new wheels at a much reduced price. Your ‘new’ wheels will carry the 2 year warranty.

If the hubs have been damaged, the wheel cannot be recovered, as the carbon parts cannot have new hubs attached to them. All repairs should be done at the BST factory.

Wheels can also be refurbished at the factory for a very reasonable fee.

Some of the properties of Carbon fiber composites as used in BST wheels:

  • Material used – Carbon fiber Prepreg in a woven and unidirectional format, embedded in a resin matrix, made from toughened epoxy.
  • Max structural temperature: 100 degrees C
  • Min structural temperature: -40 degrees C
  • Max operating temperature: 80 degrees C
  • Corrosion resistance: Totally corrosion free
  • Chemical resistance: Resistant to most dilutants such as acetone, benzene, thinners
  • Automotive fluid resistance: Limited resistance to brake fluids and acids
  • Density: Approximately 1.7 kg/qdm (Aluminum 2.7, Titanium 4.5, Steel 7.9)
  • Damage Tolerance: Similar to 2024 Aluminum
  • Strength: Better than 2024 Aluminum
  • Stiffness: Similar to 2024 Aluminum

Variable wall thicknesses can be created anywhere as needed in order to increase strength where required.
Fibers are oriented in the direction of stress in order to increase strength.
BST has a patented process for the manufacture of a monocoque (single unit) hollow spoke wheel.

What is the torque spec for sprocket bolts for a BST wheel?

Please see the BST Sprocket Installation Instructions from our Installation Instructions page: http://www.brocksperformance.com/Instructions/992014.pdf

What torque should I use when fitting the BST wheels?

Use the torque as specified for the OEM wheels. As a rule this means:

M6 bolts = 10Nm
M8 bolts = 16Nm

Make sure the bolts are free of grease or oil, and fasten them with Locktite.

The BST wheels are designed to fit the same way the OEM wheels fit. They are supplied with:

Steel bearings by World Wide Bearings, spacers and seals pre-installed
External spacers, where required
Air valves
Cush drive (rear conventional swing arm)
Sprocket carrier (rear conventional swing arm)
You will need to buy a sprocket that fits the BST sprocket carrier

Unfortunately, we’ve had to discontinue them until the price of the material becomes reasonable again, if ever.

Blackstone TEK. (“BST”) warrants each new BST carbon fiber wheel to be free from defects in material and workmanship for 2 years from date of purchase. BST’s Limited Warranty is transferable. However, any transfer of this warranty does not extend the term. A copy of the dated receipt or bill of sale from the original end user is required to determine coverage.

The R Series wheel has a modified carbon layup to provide addition strength at the spoke/rim interface as well as a robust rim flange. The carbon is considerably tougher (designed to better withstand road hazards/extreme situations/ hard-landed wheelies etc.), but it also weights a bit more as a result, 6.20 lbs. (2.81 kg) vs. 5.65 lbs. (2.56 kg) for the #161326. You will notice that the load rating is the same for both wheels 330 lbs. (150 kg) – this is because the load rating takes the strength of the hub into consideration also. Since the hubs are identical, the load rating must remain the same for both style wheels. Please see the link below for load rating safety and measurement information: Note: the R+ Series wheels are even more reinforced. Of course, they will be a bit heavier also, if identical sizes are compared.

The R Series wheel has a modified carbon layup to provide addition strength at the spoke/rim interface as well as a robust rim flange. The carbon is considerably tougher (designed to better withstand road hazards/extreme situations/ hard-landed wheelies etc.), but it also weights a bit more as a result, 6.20 lbs. (2.81 kg) vs. 5.65 lbs. (2.56 kg) for the #161326. You will notice that the load rating is the same for both wheels 330 lbs. (150 kg) – this is because the load rating takes the strength of the hub into consideration also. Since the hubs are identical, the load rating must remain the same for both style wheels. Please see the link below for load rating safety and measurement information: Note: the R+ Series wheels are even more reinforced. Of course, they will be a bit heavier also, if identical sizes are compared.

In the wet lay-up process, the fibers are positioned in the mould dry and the resin is applied with a brush. The resin is mixed by hand and mistakes can be made during mixing. This is a relatively inexpensive process, but normally the part is heavier and the fibers can distort during the lamination process meaning the process is less controlled. This method does not lend itself to the Autoclave process which cures the part under controlled heat and pressure.

In the Prepreg process used to manufacture BST wheels, the resin is applied by machine onto the fibers in a thin film. Therefore, the resin is very even and controlled. The parts are then cured under a high pressure and temperature environment (Autoclave). This results in a well-compacted laminate with better properties than with wet lay-up. Laminate properties in Prepreg Carbon fiber can be 10%- 20% better than wet lay-up at a lower weight (because less resin is used to do the same job). This Prepreg and Autoclave process is used to manufacture the exceedingly strong, but light, chassis centres (often known as ‘tubs’) for Formula 1 race cars.

Please see the BST Sprocket Installation Instructions from our Installation Instructions page: http://www.brocksperformance.com/Instructions/992014.pdf

The exact wheel weights are listed on the overview tab for each BST wheels (front is 5.5lbs./ Rear is 9.4 lbs. for the 2008 Yamaha R1).  Add the listed steel or ceramic bearing weight for a final assembled total.

You’ll gain in many ways – this is the best performance enhancing product you can buy. BSTs will make a dramatic difference that will gain you speed and responsiveness with less effort and fatigue. It’ll feel like you’ve added a few horses to your engine – but at a very reasonable price. Best BANG per $$ for performance …

Extra performance:
Low mass and lowest Moment of Inertia  results in a lower unsprung mass; this means faster cornering, later braking, improved acceleration – in all, faster lap times. Imagine the difference you’ll experience from dropping 11.2 lbs off the weight of your bike! That’s the difference in weight between the standard GSXR1000 wheels and the BSTs.

Extra Riding Fun and Rider Safety:
The huge drop in weight means that handling improves dramatically – quicker lap times with less effort and astonishing responsiveness means less fatigue.

Extra Safety:

  • Carbon fiber is a fatigue free material resulting in longer product life;
  • Carbon fiber composite is a very damage tolerant material. In the event that a wheel is damaged, the damage propagates less easily;
  • Very low corrosion susceptibility.

Extra Cool Looks:
Whether you are into performance or looks, this wheel attracts attention – gleaming, black, woven-look finish and “soft” styling makes a stunning addition to your motorcycle.

The views of UK SuperBike magazine:

what else can you do to a bike – for that money – to make it so much faster?

UK sports bike magazine, SuperBike, performed an independent two day test at the Almeria circuit in Spain using a 2002 Honda CBR900RR (954) FireBlade.

“ The first day’s testing took place with standard wheels and the only change for the second day was the substitution of BST wheels.

Weather conditions were unchanged and the following was observed:

  • Acceleration was noticeably stronger with the rider reporting “it felt as though it had gained ten horsepower 
  • The bike could be braked later
  • The bike could be turned more easily
  • Top speed at the end of the main straight was increased by 5mph
  • Lap times fell by a full 3 seconds – although the rider did report “pulling the pin out” as he felt very confident on the bike during the second day

These results are consistent with performance gains normally found by virtue of the combination of reduced unsprung weight and reduced rotational inertia provided by BST wheels. Even if a bike is not being used on a circuit, the same benefits of increased performance and rideability also apply to road/street use. “

Check out the reviews/news articles posted on our webpage: http://blog.brocksperformance.com/bst-wheel-information-page/

The BST wheels come with a 5 bolt hole sprocket carrier – the PCD of the 5 holes is 100mm and the ID is 76mm. We offer Vortex 33-51 tooth sprockets.

Use the torque as specified for the OEM wheels. As a rule this means:

M6 bolts = 10Nm

M8 bolts = 16Nm

Make sure the bolts are free of grease or oil, and fasten them with Locktite.

Load rating of BST wheels.

BST has derived our load specification from experience in the field of motorcycle physics:

The load rating printed on the wheel sticker will reflect the maximum static load/weight that is permitted on the specific wheel to not exceed the critical loads during the dynamic situation of riding the motorcycle. We design with a safety factor of approximately 4.

To check if the wheels are appropriate for your bike you can use the following rules of thumb:

Scenario 1: Motorcycle with a rider:
The usual weight distribution here is approximately 40% for the front wheel and 60% for the rear wheel.

Total Static Weight or TSW = Weight of bike with all fluids + weight of rider = 220Kg + 90Kg = 310 Kg

This leaves us with the following load ratings:
For Front wheel = 310Kg x 40% = 124Kg
For Rear wheel = 310Kg x 60% = 186Kg

Scenario 2: Motorcycle with a rider and 1 passenger:
The usual weight distribution here is approximately 37.5% for the front wheel and 62.5% for the rear wheel.

TSW = Weight of bike with all fluids + weight of rider + weight of passenger =220Kg + 90Kg + 90Kg =400 Kg

This leaves us with the following load ratings:
For Front wheel = 400Kg x 37.5% = 150Kg
For Rear wheels = 310Kg x 62.5% = 250Kg

Please go here for instructions: http://www.brocksperformance.com/brocknm/PDFS/BST_Wheel_Bearing_Replacement_Procedure.pdf

Special Note: Pay special attention to the fact that the drive adaptor bearing MUST BE SUPPORTED on the washer used to install it, as the inner spacer and brake adaptor bearing are installed. Extreme care must be taken to prevent the drive adaptor bearing from moving away from the shoulder in the wheel. Industry standard assembly techniques and tools must be used during snap-ring installation.

Brock’s Performance is an authorized BST service facility with all of the necessary tools and expertise to perform an OEM quality wheel bearing replacement.

Brock’s Performance only uses and recommends World Wide Bearings, which are installed free of charge with all BST wheel purchases through Brock’s.

The actual sprocket dimensions for BST wheels are: 5 (10mm holes) with a PCD (Pitch Circle Diameter) of 100mm and a sprocket ID of 76mm. We carry a great selection of Vortex sprockets for BST wheels,

Slight irregularities of color and small pinholes on the surface are to be expected. Most carbon fiber products are hand-crafted, and no two items will be identical. Small imperfections such as wavy weaves, small bubbles, and clear coat blemishes are inevitable. These do not affect performance.