The SKF Heavy Duty Tensioner design is the result of cooperation between the world's largest tensioner supplier, OE manufacturers and fleet operators.  Field and lab testing confirms that SKF Heavy Duty Tensioners are the most robust tensioners available, lasting up to 3 times longer than competitive flat spring tensioners - that's over 400,000 miles of durability!  And they cost about one third less than OE replacements.  For durability and reliability you can count on, turn to SKF Heavy Duty Tensioners.