FSA helps you choose your replacement headset

Enter four measurements and out pops your replacement headset bearing

(Image credit: FSA)

Headset replacement is one of the most confusing areas of bike tech. Whereas bottom brackets and axles each come in a few possible variants, the range of options for headset bearings is vast, with every bike seeming to use something a bit different from every other bike and differences between bearings not at all obvious.

Does an Orbit 1.5E ZS replace an Orbit 1.5 ZS SC or a Big Fat Pig 1.5R replace a Big Fat Pig? (Yes, that really is a headset model name).

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Paul Norman