Tirox rail rail light alloy steel this material is highly resistant to traction and torsion for its light weight its for these reasons it is used in used in the aviation and aerospace industry tirox then turns out to be a rail with a good balance between weight and strength that doesnt fear the normal stress that addresses a bicycle side protection system the smart solution to protect the sides of the saddle it protects the saddle when the bike is leant against a wall or a tree avoiding