DMRDMR Bike Chain Tensioners

DMR Chain Reactor image DMR Chain Reactor

- Device locks chain onto a single front chainring via guide roller with cartridge bearing
- Machined aluminum arm attaches to ISCG-05 3-bolt bottom bracket mount
$30.95


DMR Tension Seeker 2 Chain Tensioner image DMR Tension Seeker 2 Chain Tensioner

- Features anti-derailment guards that encase the pulley
- Tensioner allows the use of a 1 speed drivetrain on a vertical drop frame
- Mounts to derailleur hanger with double sealed pivot bearing
- Pushes down or up on the chain using an adjustable tension linear spring
- Alloy pulley with sealed cartridge bearing
- Also useful for internally geared hubs
$57.95
DMR STS Chain Tensioner image DMR STS 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
- Optional: STS blister packaged with 1-speed Conversion Kit containing 1) 16t HG cog, lockring and 3 spacers to replace any 8/9sp cassette
$23.95

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