ARI fork seal set The quality of their execution is offset by the unique nature of the material used (XNBR). The Inge fork offer unique properties and are used in modern forks of motorcycles and scooters: - Resistance to high temperatures and abrasion ARI Inge fork corresponds both in terms of quality, as well as the dimension of the OE quality. Hence the best sealing results in all road and weather conditions. The Inge fork can be used in daily use in racing or even in vintage cars.