Sinister Frames

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Not going to “tune” that bike. Don’t feel like changing pedals on the other one. You reach for the Ridge. We know you didn’t arrive here by doing a search under “bikes” or even “mountain bikes”. You didn’t arrive here by accident looking for music or cool clothing.

We know why you are here. You are the guy or girl that has to get to the trails, get a killer ride and get on with it. It’s not a love story, a family vacation or shuttles on Friday night. If you have only one bike it should be versatile, reliable and always ready for whatever. If you have several, this bike will be the one you grab what the shit hits the fan.

You can be big, you can be strong and you could have had great customer service “experiences” from another company who warranted your last six frames. We welcome you. Don’t be afraid to stand out.


  • All mountain geometry
  • All 6061 aircraft quality tubing
  • Replaceable hanger
  • Open cockpit design
  • One piece chain guide/bottom bracket shell
  • 73 mm ISCG bottom bracket shell
  • 135 x 10 mm rear spacing
  • 1 - 1/8" deep press headset compatible
  • 27.2 mm seat post
  • 34.9 mm top pull derailleur
  • 31.8 mm seat post clamp
  • International standard brake only
  • All 6061 - T6 aircraft aluminum
  • Square tube chain and seat stays
  • Gusseted triangle for extra durability
  • Optional water bottle mounts (must be requested prior to ship date)
  • 2.6 tire capacity
  • Designed for 6" travel fork
  • 5 lbs. frame weight
  • Designed by FTW and the staff at Sinister bikes
Small Medium Large
Head Angle 68.5 deg 68.5 deg 68.5 deg
Seat Tube Angle 72 deg 72 deg 72 deg
Seat tube length (center to end) 16" 17.5" 19"
Eff TT Length 22.5" 23.5" 24.5"
BB Height 12.5" BB shell is 17 mm (3/4") below axle
CS length 16.7" 16.7" 16.7"
Intended fork travel 120 mm (5") on ST up to 180 mm (7") on STD
Head Tube Length 4.5" 5" 6"