DMRSTS Chain Tensioner

– Simple tension seeker (STS) allows the use of a 1 speed drivetrain on a vertical drop frame
– Perfect for street or dirt jump where simplicity and durability is key
– Stainless steel arm mounts to derailleur hanger and dropout
– Loosen bolt and swing down and back to adjust chain tension
– High density polyurethane pulley with sealed cartridge bearings