Best-Selling Fulcrum Racing 4 C17 Wheelset

Performance plus versatility equals maximum satisfaction: the Racing 4 Wheelset by Fulcrum

The Racing 4 from Fulcrum is able to deliver that little bit extra, regardless of the ground conditions ahead of you. Its lightweight, medium-depth rim profile makes it an ongoing discovery with an enviable approach and eyes focused on performance. With a 35 mm profile, the Racing 4 displays a successful balance between aesthetics and performance. The medium-depth rim profile makes a difference on flat ground when riding without punishing on climbs, where it remains lively and agile while re-accelerating.

Specifications:

Application:

Road / Triathlon

Wheel Size:

28″

Tyre Type:

clincher tyre

Number of Spokes:

16 (front) / 21 (rear)

Brake Type:

rim brake

Tubeless System:

none

Freehub Compatibility:

Shimano Freehub:

8-/9-/10-/11-speed Shimano

Campy Freehub:

9-/10-/11-/12-speed Campagnolo

Note:

Installing 8-/9-/10-speed cassettes on Shimano freehub bodies requires a 1.85 mm spacer.

Technical Information – Rim:

Dimensions (ETRTO):

17-622

Inner Width:

17 mm

Outer Width:

23 mm

Depth:

35 mm

Rim Material:

aluminium

Technical Information – Front Hub:

Over Locknut Dimension:

9×100 mm, standard quick release

Bearings:

adjustable cartridge, sealed

Body Material:

aluminium

Technical Information – Rear Hub:

Over Locknut Dimension:

10×130 mm, standard quick release

Bearings:

adjustable cartridge, sealed

Body Material:

aluminium

Freehub Body Material:

Plasma treated

Technical Information – Lacing:

Front Lacing Pattern:

radial

Rear Lacing Pattern:

radial (L), 2-cross (R)

Spoke Type:

aero / straight pull

Spoke Material:

stainless steel

Nipple Material:

aluminium

Approved For:

Weight Limit:

109 kg total weight

Recommended Tyre Width:

25 – 28 mm

Features:

• front hub with aluminium flanks
• rear hub with aluminium flanks
• milled brake flanks
• bevelled rim sides

Technology:

RPV Dynamic Balance™
The concept is simple and ingenious: balance the mass of the rim joint with an equivalent mass positioned exactly on the other side of the rim. On the top-of-the-range models, this is achieved by special machining in the area opposite the rim joint. The result is a wheel that is perfectly balanced during rotation.

2:1 Two-to-One™
At the moment when the rider pedals at full power, the rotation of the cassette causes the spokes on the freehub side to give way, resulting in a loss of rim tension. This causes excessive bending of the whole and this inevitably means a loss of energy. Fulcrum has solved this classic problem in cycling with its 2:1 Two-to-One Spoke Ratio patent, that is, with twice the number of spokes in critical areas. In this way, two spokes take over the task of one, the yielding and twisting of the wheel remains low and the transmission of the athlete’s energy becomes much more efficient. Thanks to this patent, the spoke tensions are more balanced and the fatigue strength of rim, hub and spokes is much higher.

Colour Index:

• Rim: black, black / red decals
• Hubs: black, black / red decals
• Spokes: black
• Nipples: black

Manufacturer Number:

Campy Freehub:

R4-19CFRBC

Shimano Freehub:

R4-19CFRBS

Contents:

• 1 x Fulcrum Racing 4 C17 Clincher wheelset (front and rear wheel)
• 2 x Fulcrum quick releases
• 1 x spacer (Shimano only)