Ritchey Logic EC34/28.6 - EC34/30 Threaded Headset

Item number: 28885
from 9.66€

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Logic EC34/28.6 - EC34/30 Threaded Headset - black/EC34/28.6-26tpi - EC34/30
Logic EC34/28.6 - EC34/30 Threaded Headset - black/EC34/28.6-26tpi - EC34/30
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The Ritchey Logic threaded headset is a classic that will ensure you can spend many more years on the roads and trails with your trusty bike.

Use: For 1 1/8" upper and lower head tubes combined with standard 1 1/8" forks.


Application: Road, Cross Country
Upper Cup: 1 1/8"
Lower Cup: 1 1/8"
Pitch: 26 tpi
Steerer Tube: 1 1/8"
Design: external cup (EC)

Technical Information:

Material: steel (CrMo), composite
Bearings: ball bearings
Upper Outer Diameter: 34 mm
Upper Inner Diameter: 28.6 mm
Lower Outer Diameter: 34 mm
Lower Inner Diameter: 30 mm
Top Cap: 36.7 mm


- Bearing Angle: 45°

Standardized Headset Identification System (S.H.I.S.):

In order to clarify and bring uniformity to a sea of headset standards, manufacturers Acros, Cane Creek, Hope, Race Face, Reset Racing and Ritchey have agreed upon using a shared nomenclature, which will likely include more participating companies in the future. This system takes into account a combination of frame and fork dimensions. Both the upper and lower part of the headset are marked by two alphanumeric identifiers. The first identifier indicates the type of headset (External Cup, Zero Stack, Integrated) and head tube diameter. The second identifier - separated from the first by a backslash - indicates the diameter of the steerer tube. When referring to a complete headset, the specifications of both upper and lower parts must be combined.


EC: Bearings contained within cups that are located outside of the frame (external cup).
ZS: Bearings contained within pressed-in cups where the cup and bearings rest inside the frame (zero stack).
IS: Bearings that fit directly into a bonded or machined interface that is integrated into the frame (integrated).

Manufacturer Part Numbers:

black: 33-230-191
silver: 33000877002


- 1 x Ritchey Logic upper cup incl. bearings
- 1 x Ritchey Logic lower cup incl. bearings
- 2 x nut
- 2 x circlip
- 1 x compression ring
- 1 x crown race


in stock 2 to 7 days up to 10 days Out of stock inform me
  • black/EC34/28.6 - EC34/30
  • silver/EC34/28.6 - EC34/30

Customer Reviews (2)


Customer Reviews (2)


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by cosmin r.  on 13.08.2019
verified purchase
1 of 1 customers found this review helpful.

I have used these on my 30y old MTB for almost 3 years in all conditions without any problems, they are the best you can get when it comes to price quality ratio.

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