The Lainer Suspension fork piston seal is a service part for WP AER 48 forks. It is used to support sealing within the fork’s air system during maintenance or rebuild work. Replace the seal when there are signs of wear, damage, or air pressure loss; it is not typically changed if the seal is in good condition and the fork is holding pressure.

Inside the System

This piston seal is an X-ring style seal used on the fork piston within WP AER 48 air fork assemblies. Its role is to help maintain air pressure by sealing between moving components in the air chamber.

Serviceability

  • Replace during an air-side service if the existing seal shows nicks, deformation, hardening, or leakage.
  • Replace if the fork cannot maintain stable air pressure after correct assembly.
  • Do not replace solely on time/interval if inspection shows the seal is clean, elastic, and sealing correctly.

Compatibility

  • Brand: Lainer Suspension
  • Fork type: WP AER 48

Key Features

  • X-ring piston seal format
  • Intended for use in WP AER 48 fork air system service work
  • Specified seal dimension: 26,58×3,53

Setup & Workshop Notes

  • Confirm the seal size and fork model before installation.
  • Inspect mating surfaces for scoring or contamination that can cause repeat leakage.
  • Replace only what is required for the fault found; unnecessary seal changes can introduce assembly damage if not handled carefully.
SKU X-RING4106
Brand Lainer Suspension
Unit Of Measure Each
Assembled Length 0.600m
Assembled Height 0.011m
Assembled Width 0.110m
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