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Jeff
Jeff
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The key to finding out the headset you require is obtaining the internal diameter of the headtube. The trouble here lies in the fact that to obtain the measurement the bearing cups need to be removed so just the frame's headtube bore is measured. This leaves the bike unrideable while a new headset is obtained unless one wants to press the old cups back in which makes little sense IMHO.

Measurement of the internal diameter of the headtube should be obtained with a caliper and two. Two measurements 90 degrees from each other should be obtained and then averaged to get the final headtube I.D. (aka: bore). The majority of bikes with 1" threaded headsets use the ISO standard for the headtube bore and crown race ifof the fork. This article from VeloOrange describes the standards and discusses some other details ifof threaded headsets. Essentially, you will likely find the ID of your bike's headset to be very near 30 -- 30.15mm. If so, you'll require an EC30/25.4 headset. This is the standard headset identification system (S.H.I.S.) used to correctly identify what headset is needed.

Park Tool's threaded headset service instructional has excellent tips on how to do the service as well as links to other articles about headsets, their standards and servicing them.

The key to finding out the headset you require is obtaining the internal diameter of the headtube. The trouble here lies in the fact that to obtain the measurement the bearing cups need to be removed so just the frame's headtube bore is measured. This leaves the bike unrideable while a new headset is obtained unless one wants to press the old cups back in which makes little sense IMHO.

Measurement of the internal diameter of the headtube should be obtained with a caliper and two measurements 90 degrees from each other should be obtained and then averaged to get the final headtube I.D. (aka: bore). The majority of bikes with 1" threaded headsets use the ISO standard for the headtube bore and crown race if the fork. This article from VeloOrange describes the standards and discusses some other details if threaded headsets. Essentially, you will likely find the ID of your bike's headset to be very near 30 -- 30.15mm. If so, you'll require an EC30/25.4 headset. This is the standard headset identification system used to correctly identify what headset is needed.

Park Tool's threaded headset service instructional has excellent tips on how to do the service as well as links to other articles about headsets, their standards and servicing them.

The key to finding out the headset you require is obtaining the internal diameter of the headtube. The trouble here lies in the fact that to obtain the measurement the bearing cups need to be removed so just the frame's headtube bore is measured. This leaves the bike unrideable while a new headset is obtained unless one wants to press the old cups back in which makes little sense IMHO.

Measurement of the internal diameter of the headtube should be obtained with a caliper. Two measurements 90 degrees from each other should be obtained and then averaged to get the final headtube I.D. (aka: bore). The majority of bikes with 1" threaded headsets use the ISO standard for the headtube bore and crown race of the fork. This article from VeloOrange describes the standards and discusses some other details of threaded headsets. Essentially, you will likely find the ID of your bike's headset to be very near 30 -- 30.15mm. If so, you'll require an EC30/25.4 headset. This is the standard headset identification system (S.H.I.S.) used to correctly identify what headset is needed.

Park Tool's threaded headset service instructional has excellent tips on how to do the service as well as links to other articles about headsets, their standards and servicing them.

Source Link
Jeff
Jeff
  • 11k
  • 12
  • 29

The key to finding out the headset you require is obtaining the internal diameter of the headtube. The trouble here lies in the fact that to obtain the measurement the bearing cups need to be removed so just the frame's headtube bore is measured. This leaves the bike unrideable while a new headset is obtained unless one wants to press the old cups back in which makes little sense IMHO.

Measurement of the internal diameter of the headtube should be obtained with a caliper and two measurements 90 degrees from each other should be obtained and then averaged to get the final headtube I.D. (aka: bore). The majority of bikes with 1" threaded headsets use the ISO standard for the headtube bore and crown race if the fork. This article from VeloOrange describes the standards and discusses some other details if threaded headsets. Essentially, you will likely find the ID of your bike's headset to be very near 30 -- 30.15mm. If so, you'll require an EC30/25.4 headset. This is the standard headset identification system used to correctly identify what headset is needed.

Park Tool's threaded headset service instructional has excellent tips on how to do the service as well as links to other articles about headsets, their standards and servicing them.