White Industries EC34/EC37 - 1-1/4 crown race

Note: As the White Industries catalogue is diverse, we don't stock every variant or colour. However, we place regular airfreight orders. If an item is in stock at White Industries, we can usually have it here within a week. Even if it's not in stock, they can often assemble it for us, and we can have it within three weeks at most. Feel free to get in touch if you're after something specific!

The EC34│EC37 headset is designed to fit frames with tapered head tubes and can accommodate straight 1-1/8″ and tapered 1-1/4″ (33mm) fork steerers with the appropriate crown race. The “EC” stands for “External Cup” meaning the section of the cup that houses the bearing sits outside of the frame’s head tube and the “34”/”37” (top/bottom) stands for the diameter of the “skirt” that presses into the frame. 

Note: As of 9/14/23, headsets will no longer include Star Nuts due to the Earth’s star nut overpopulation crisis. If you need one, they are available separately.

Features

• U.S. sourced 6061-T6 aluminum
• Machine engraved White Industries logos 
• Easily replaceable 440C Stainless Steel Enduro bearings which feature a limited lifetime warranty
• “Split” crown race for tool-free installation and removal
• Really sweet matching headset spacers available separately

Specs 

• • SHIS specification
    • Upper: EC34/28.6
    • Lower: EC3733
  • Stack height
    • Upper: 15mm
    • Lower: 12mm
  • SHIS definitions on the Park Tools website: here
  • Frame/Fork specs:

  Frame upper head tube inside diameter	33.9mm to 33.95mm
  Frame lower head tube inside diameter	36.8mm to 36.95mm
  Fork steerer diameter top section	28.45mm to 28.6mm
  Crown race seat diameter for “straight 1-⅛”	30.015mm to 30.075mm
  Crown race seat diameter for “tapered 1-¼”	33.03mm to 30.09mm

  Bearings

  Headset Model	Upper Bearing (inner/outer angle)	Lower Bearing (inner/outer angle)	Lower Fork Race Compatibility
  EC34│EC47	ACB3645SS (36/45)	ACB45/45125LSS (45/45)	1-¼” (33mm)