Bmx Headset Bearing Sizes

What size is my steerer.

Bmx headset bearing sizes. The vast majority of bikes with threaded headsets use the 1 inch size. This can seem confusing because the head cups do not measure the named standard. Mountain bike headsets at chain reaction cycles. Feel for any notchyness before cleaning greasing the cups and reassembling.

In the case of a bicycle with a traditional quill expander wedge type stem the stem shaft will be 1 8 smaller than the steerer. First off there are 4 different sizes of ball bearings used for bike parts. Here s a list of standard most commonly used dimensions of bearing balls. This size was also used for older british steel drop bars.

Sometimes people measure the stem diameter and assume incorrectly that this is the size headset they have. Threaded headset sizes are designated by the outer diameter of the steering column. Bmx bike headsets at chain reaction cycles. 7 8 obsolete british size for steel handlebars common on older 3 speeds.

Oh and some shimano pedals even use 3 32 size balls. Pop the bearings out and clean. Check manufacturer s website for recommended torque settings. Threadless headset bearing sizes are 1 and 1 diameter these can be straight headset bearings and are 1 or tapered headset bearings which are 1 5.

The threaded standards are 1 inch 1 1 8 inch and 1 1 4 inch headsets. However i want to replace the bearings as they ve been on the bike for 5 years now and it s a straightforward job now that i ve learned how to take apart the headset and reassemble it. This article will review the shis standard headset information system. Road bike headsets at chain reaction cycles.

How to service a headset and replace headset bearings. 5 32 1 8 3 16 and 1 4. There are other exotic sizes but they are extremely rare. But what i m confused about is the size of caged headset bearings that i will need as a replacement.

Mainly bmx older mountain bike bars. Standardized headset identification system. You will be able to find the headset bearing size your bike requires by looking at the steerer. Everything you need to know.

Now to show how confusing it can be just look at campagnolo s headset ball bearings entry in sutherland s handbook for bicycle mechanics. The shis nomenclature is designed to simplify the discussion of headset standards and will make it easier to compare models when ordering replacement headsets. Optimal hardness for bicycle ball bearings is between 55 and 65 hrc.