Fulcrum Road Bike Wheelset | Racing 4 High-Performance Alloy Disc Brake type for Road, Racing, Endurance

Fulcrum Racing 4 DB
RACING 4 DB - The cult Italian racing legacy in its true form - from the legendary Campagnolo!

35mm is the sweet spot point for the mid-profile rim. When we start to talk about aerodynamics, stability at high speeds, and maximum steering precision. Racing 4 DB is a sturdy, precise aluminum wheel with sophisticated features such as straight-head spokes and the 2-Way Fit Ready profile, all in one super competitive package that's ready to race.

It is the perfect range for those looking for aerodynamics and ideal for triathletes as well as rouleurs who are eager to perform well on the climbs. Every watt will enhance performance, every turn will be executed with precision.

Technologies

Anti-Rotation System™
This new system raises the concept of spoking to a new level of performance for road bike and triathlon wheels ( and MTB too)
The Fulcrum® engineers have redesigned the spokes and the hub housings to create a solid and unmoveable whole. The result is that the spokes

a) will never lose their initial tension, thus keeping the wheel perfectly reactive and centered
b) will remain in the position that has been studied in the wind tunnel tests to ensure the best aerodynamic penetration possible.

Fulcrum Identification Card - 100% Handmade Quality

Right from its inception, Fulcrum® has been marked by the feature that continues to this day: that is to design, prototype, and industrialization all the wheels characterized by the red “F”.
Indeed these take shape inside of the R&D, the leading-edge department that represents the beating heart of the Italian company.
Every single component of the wheel, the materials chosen, and the technologies applied are the tangible result of the effort that Fulcrum® makes every day to give you maximum performance and reliability.

What Is This?
To ensure the best performance and reliability of its products, each project, before going into the production stage, must be submitted to a series of severe tests that validate what has been conceived and designed up to that moment (fatigue test, crash test, tire burst test, environment test, 100% manually assembled and electronically checked).
This is why, from its 2012 range, Fulcrum® wanted to supply each wheel with its own Identity Card (F.I.C.) which uniquely identifies the wheel and certifies that it has been manually assembled and has passed all tests required by the strict quality protocol.

AFS Axle System™
The Axial Fixing System™ is the solution developed by Fulcrum® to fix the disc brake to the hub. The constraint granted by the butt area of the release mechanism, greater than in familiar standard ones, makes it possible to obtain greater structural rigidity and therefore more precise and powerful braking.

Compatibility
The availability of the International Standard option ensures full compatibility of Fulcrum® wheels even with the most widespread braking systems that use this assembly plan.

Disc Specific Rim

Monoblock Hub for Disc
The rear hub of a top-quality disc brake wheel is a technical problem to be solved. Fulcrum®’s R&D department found itself facing a fundamental choice: on which side to put the oversize flange of the Two-to-one™ system? Disc or sprocket side? Without question - must stay on the sprocket side.
To combat the loss of braking power from flex and torque of the connector between the two sides of the hub, a special one-piece system has been devised with internal stiffening ribs.

The End Result
The end result is maximum torque transmission while pedaling and forces coming from the disc on the opposite side when braking.
In this way, the system works both accelerating and braking when spokes that are more numerous and with more dishes are involved.
At the same time, the other side confirms the spokes’ radial layout, saving precious weight.

• 2WAY - FIT™ READY (ROAD)
• Following Fulcrum Road wheels:
• RACING 4 DB
• RACING 5 DB
• RACING 6 DB
• RACING 7 DB
• and original equipment bike wheels (custom colors)
• RACING 400 DB
• RACING 500 DB
• RACING 600 DB
• RACING 700 DB
• RACING 800 DB
• RACING 900 DB
• can be converted into 2-Way Fit™ Ready.

It shall be the end user’s sole and full responsibility to choose - on a case-by-case basis – an adequate and correct rim-tire-pressure combination, as well as to conduct all verifications necessary to ascertain the correctness and safety of such combination.

Without prejudice to the above, and in order to ensure optimum rolling resistance, grip, and, most importantly, safety, we recommend that the end-user, in making his choice, also takes into consideration the recommended combinations of hooked rim width, tire width and tire pressure indicated in the chart set forth below.

Due to safety reasons, follow the information of the tire manufacturer regarding the minimum and maximum rim width to be used but always ensure that the combination is listed as possible in this table.

Compatibility table (link)


Please Follow the Specific Fitting Procedure Here Below:

This procedure transforms Racing 4/5/6/7 DB and Racing 400/500/600/700/800/900 DB wheels (designed to be used with a clincher tire and inner tube) into tubeless Ready wheels (i.e. with a Tubeless Easy tire, no inner tube and compulsory use of a sealant liquid).

To ensure the correct transformation of the wheels, it is obligatory to respect the procedure explained below.

Use of tubeless and tubeless-ready tires is forbidden on 2-way Fit Ready rims without official Fulcrum 2-way Fit Ready adhesive tape.

1.

Please note In the event of a puncture consequently requiring the use of an inner tube, for the tire to be correctly mounted you cannot use a portable mini-pump but must use a CO2 canister.

• Remove the original rim tape from the wheels, if present, using a screwdriver to separate it from the rim (Fig.1).
• Using a cloth and some isopropyl alcohol, clean and degrease the wheel rim thoroughly, cleaning along the entire inner well and the inner walls of the rim, which will be in contact with the tire beads (Fig. 2).
• Start applying the tape between the second and third spoke nipples (A - Fig. 3) after the valve hole (X - Fig. 3). Start applying the tape from A and move towards the valve hole.
• Apply the tape carefully, ensuring that the entire length including the initial part adheres fully to the rim, pressing well with the fingers or with a plastic tool (Fig. 4). If necessary, cut off the initial part of the tape if it is not correctly adhered to the rim.
• Gradually unroll the tape, applying it around the circumference of the rim. Keep the tape taut and press it into the center well, ensuring it is properly centered between the inner walls of the rim (Fig. 5).

2.

It is extremely important that the full length of the tape applied adheres completely to the center and does not cover any part of the inner walls of the rim, which will be in contact with the tire beads. This is to prevent the tire bead from detaching from the wheel during inflation or use, which could cause accidents and lead to severe or even fatal injury (Fig. 6 / Fig. 7).

• Once the tape has reached the valve hole, continue applying tape to cover another 2 spoke nipples, then cut with scissors and adhere perfectly to the overlapped length of tape. (Fig. 8).
• Run your fingers over the tape to press out any air bubbles and check that the tape has completely adhered to the rim. Using the tool normally used to demount the tire, press the edges of the tape along with the bases of the inner sidewalls of the rim (Fig. 9).
• Using a cutter, make an X cut on the valve hole without reaching the edge of the hole itself (Fig.10).

Be very careful not to damage the rim surface with the blade of the cutter in order to conserve the anodization rim treatment. This prevents oxidation, which can reduce the life of the rim due to fatigue.

3.

• Insert the valve in the hole and, insert the asymmetrical spacer (not applicable to Racing 4 DB / Racing 400 DB) suitably placed on the rim, block it using the knurled nut (Fig.11).
• Observe the rotation direction of the tire (Fig.12).
• Fit a tire bead into the central channel of the rim (Fig.13).
• Fit a second tire bead, starting from the opposite side of the valve (Fig.14).
• Dip a brush (diameter approx. 2 cm) in a container of water and neutral soap, and apply plenty of water to the tire beads (Fig.15).
• Check the valve is fully open (Fig.16).

4.

• Inflate the tire without exceeding the maximum pressure indicated on the tire, using a compressor or a pump, so the tire bead is seated on the edge of the rim.
• Never exceed the maximum pressure indicated on the tire. Pressure above this level could cause the wheel to burst suddenly, causing accidents, physical injury, or death.
• Carefully check that the tire beads are correctly placed on the rim in a uniform manner along the entire circumference of the wheel.
• Deflate the tire by pressing on the top part of the valve and preparing the tire sealant liquid according to the manufacturer's instructions.
• Prop up the wheel, holding it in a vertical position with the valve on the uppermost point (Fig.17).
• If you are able to insert the liquid using a syringe: remove the central part of the valve using a suitable tool, insert the quantity of liquid suggested by the manufacturer and reinstall the central part of the valve (Fig.18).
• If you do not have a syringe, unseat the beads on one side of the tire, pour in the liquid, insert the quantity suggested by the liquid manufacturer, and reposition the bead in the central channel of the rim (Fig. 19).
• Reinflate the tire without exceeding the maximum pressure indicated on the tire and carefully check that the tire beads are correctly placed on the rim in a uniform manner along the entire circumference of the wheel.
• Never exceed the maximum pressure indicated on the tire. Pressure above this level could cause the wheel to burst suddenly, causing accidents, physical injury, or death.
• Rotate and shake the wheel so the liquid can seal all its inner surface. Apply water and soap to the cover and check for any bubbles, which would indicate air leaking from the cover. Position the wheel so that the liquid will flow to the area of the air leak, so the liquid can block it (Fig.20).

Features

• Tire Type: 2-Way Fit Ready (for clincher and tubeless-ready)
• Tire Size: 28"
• Discipline: Road / Triathlon
• ASTM CATEGORY 2
• Weight: 1690 g
• Rim Material Aluminum
• Rim Material Details Aluminum
• Profile Height Medium
• Rim Height Front and Rear: 35 mm
• Rim Width 22 mm
• Inner Rim Width(channel): ETRTO 17C
• Tire Width From 23 mm to 50 mm
• Braking System: Disc brake
• Braking Surface/brakes Options AFS
• Front Axle Compatibility: QR/HH15-100/HH12-100 (no skewers incl.)
• Rear-Axle Compatibility: QR/HH12-142/HH12-135 (no skewers incl.)
• Front-Wheel Spokes: 24 (16 left - 8 right)
• Rear-Wheel Spokes: 24 (8 left - 16 right)
• Spokes: Material: Stainless steel
• Spokes: Profile: Rounded, straight pull
• Nipples: Aluminum
• Front Hub: Aluminum, Aluminum flanges
• Rear Hub: Aluminum, Aluminum flanges
• Bearings: Sealed cartridge bearings
• Others: Aluminum Axle
• Weight Limit: 109 kg (Cyclist)
• FWB Options HG11, Campy, Optional: XDR.

*NOTE: The "Racing 400 DB" custom model has the same technical features as the "Racing 4 DB" model described here

This item is non-returnable - Contact Support for any pre-purchase inquiries: Neither Cycling Boutique nor the supplier accepts return/cancellation of this product. Please clarify all your queries regarding size, fitting, etc. well before you order this product.

Additional Shipping Charges Apply: This shipment originates from our distribution center in Bangalore, India. Any orders received out of Bangalore will attract a nominal shipping charge, to be decided after the order is placed and when the product is ready for dispatch - by checking the volumetric weight of the shipment box. Applicable shipping charges by the transporter will be communicated and to be paid before the dispatch.