Fork seals — measure once, order once

Most seals on our shop are listed as ID × OD × height in millimetres (for example 43×54×11). The first number is the seal inside diameter — it must match your fork tube outside diameter.

1. Clean the lower fork tube Wipe mud and grit so the caliper sits true. Dusty Gauteng roads love to fake a thick reading.
2. Measure fork tube OD Use a digital caliper across the shiny tube (not the chrome lip of the seal). Write the millimetre reading — e.g. 43 mm.
3. Read the old seal marking Many seals are stamped ID×OD×height on the metal or rubber face. If the stamp is gone, measure ID (inner), OD (outer), and height (thickness of the seal body).
4. Match the shop listing Our FKS-* and Athena P40FORK* titles use that same order. Oil seals and dust seals are different heights — don’t mix them.

Tip: If you only have a phone, photograph the old seal next to a ruler (mm side) and WhatsApp it to 079 231 2573 with your bike make, model and year.