ARI the original fork oil seals by Ariete – MTB is the best you can get. This claim is justified by the quality of the materials used, and attention to detail in their design and manufacture. ARI the original fork oil seals – perfection, from Ariete.

  • The graphite-rich compound creates a self-lubricating material which is both heat and abrasion resistant
  • In using a low-stiction material the product guarantees an outstanding smooth action
  • The fine-ground seal lips with 100% inspection ensure an enhanced performance
  • Includes a capsule of ARISIL
  • ARIMER foams included if need it
  • SAG RING included

To see all our ARI KIT MTB COMPOSITION, click here

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ARI – THE ORIGINAL FORK OIL SEALS, custom-made for your fork

Ariete fork oil seals are different! The quality of their execution is matched by the unique nature of the material used: the carboxylated elastomer known as XNBR.

This compound offers unique characteristics of resistance to abrasion, to high temperatures, and to the complex lubricants with numerous additives, which are used in modern forks as fitted to motorcycles and scooters.

The reciprocating action of the fork tube against the seal subjects it to a notable degree of abrasion, which is complicated by the heat generated as a result of hydraulic displacement within the fork, plus the friction of the components involved. This mechanical wear and tear leads to accelerated ageing of the rubber which is also obliged to deal with the chemical action of the various additives in the lubricant.

Oil seals are normally made from a nitrile rubber, known as NBR. This is used because it is cheap, and plentiful, not because NBR is the best material for the job.

Our technical staff have accumulated 70 years of experience in the rubber industry, and have spent many years looking for a better material for the manufacture of oil seals.

Although the cost of XNBR is almost twice that of NBR, the sophisticated technology used to make our oil seals enables us to put them on the market at highly competitive prices. In this way, the Ariete Customer enjoys the benefits of a very high quality product, which satisfies the most demanding requirements, at a competitive price.

ARIMER, mixed open and closed-cell polyurethane foam

The unique combination of both an open and closed cell creates the perfect formula; the open cell absorb and retain the lubrificating fluid whilst the closed cells ensure an excellent elastic return. working in tandem, the closed cells release the fluid from the open cells, improving the lubrication of the fork tube overall leaving a smoother action.



The term SAG refers to how much your suspension sits into it’s travel just by having your body weight on it with both feet off the ground.

SAG RING is used to indicate rider sag when setting up mountain bike suspension components and to demonstrate the amount of travel being utilized while riding.

Additional information


Sandro Mentasti Environmental Protection Program since 2007


Quality Management system according to ISO 9001:2015 and Occupational Safety Management according to ISO 45001:2018

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