Racing 4: Performance + versatility = maximum satisfaction. Racing 4 is the classic trick up your sleeve, because it gives that extra something, whatever the terrain. 
It's light with a responsive medium profile offering an enviable superiority and eyes fixed on performance.
Fulcrum's R&D department has capitalized on experiences from developing similar rims to create this package suited to diverse requirements, which makes no attempt to disguise its noble pedigree.
The 35mm profile is a winning combination of great appearance and great performance. This medium profile makes all the difference on the flats at cruising speeds, but is no less excellent uphill, with agile and powerful relaunches. 
Specification 

Suitable for clincher
Axle: Q/R
Caliper braking system
Rim details: Aluminium, turned braking surface
Rim height: 35mm
Rim width: 23.2mm
Inner rim width (channel): ETRTO 17C 
Tyre compatibility: 23-47mm
Spokes: 

Front; 16 - (8 left - 8 right)
Rear; 21 (7 left - 14 right)


Spoke material & technology: Aero, straight pull, stainless steel double butted
Hubs: 

Front; Aluminium, aluminium flanges
Rear; Aluminium, aluminium oversize flanges


Bearings: Industrial bearings system, adjustable
Axle: Aluminium
Target weight: 1725g
Weight limit: 109kg (cyclist)
Nipples: Aluminium

Technologies

RDB™ Rim Dynamic Balance
Anti-Rotation System™
F.I.C. Fulcrum Identification Card - 100% HANDMADE QUALITY
Traceability
Wide Rim Technology
Oversize Flange

For more product information: https://www.fulcrumwheels.com/en/wheels/road-bike-wheels/racing-4



    

      
        

          
Tyre Type
          
Clincher
        
      
        

          
Axle
          
Q/R
        
      
        

          
Brake Type
          
Caliper
        
      
        

          
Rim Details
          
Aluminium, turned braking surface
        
      
        

          
Rim Height
          
35mm
        
      
        

          
Rim Width
          
23.2mm
        
      
        

          
Inner Rim Width (Channel)
          
ETRTO 17C
        
      
        

          
Tyre Compatibility
          
23-47mm
        
      
        

          
Spokes Front
          
16 - (8 left - 8 right)
        
      
        

          
Spokes Rear
          
21 (7 left - 14 right)
        
      
        

          
Spoke Material & Technology
          
Aero, straight pull, stainless steel double butted
        
      
        

          
Hubs Front
          
Aluminium, aluminium flanges
        
      
        

          
Hubs Rear
          
Aluminium, aluminium oversize flanges
        
      
        

          
Bearings
          
Industrial bearings system, adjustable
        
      
        

          
Axle Material
          
Aluminium
        
      
        

          
Target Weight
          
1725g
        
      
        

          
Weight Limit (Cyclist)
          
109kg
        
      
        

          
Nipples
          
Aluminium