Titanium 420

Adaptable Trail Hardtail for 29" or 27.5" Wheels

The Ti 420 is our all-purpose trail frame, capitalizing on short chainstays and designed with more versatility than any other similar frame. Ti softens the blows and drops the weight, while 420mm chainstays ensure snappy handling. Paragon Machine Works sliding dropout inserts allow for any combination of brake mounts, axle types and gearing you can think of, from black anodized thru axle with 74mm post mounts to silver Rohloff-specific with 51mm disc tabs.

Our most recent iteration of the frame features clamp-on cable guides on the underside of the downtube for a cleaner look and the ability to customize the number of housing sections you’re using. And of course, there is a port for internal dropper routing.

Want to try 27.5 or 27.5+? No problem! The 420 has a slightly higher-than-average bottom bracket height, allowing it to handle 27.5 wheels without bringing the bottom bracket height too low.

If you’re looking to run fatter tires like 29 x 2.8 or 3″, check out our Gnarvester 29+ frame!

Is there a little detail you don’t like? Want to tweak the geometry a bit? Have a cool idea for a frame? As with all our titanium frames, customization is no problem. For an extra $300 we can edit this frame to your liking, or start completely from scratch. Contact us any time and let us know what you’re looking for. We can help you design a frame and give you an accurate timeline for how long it will take to build.


  • 3/2.5 seamless titanium
  • Brushed finish with subtle bead-blasted logo
  • 12 sizes from 14″ to 25″
  • 4.9 pounds in medium size
  • Clearance for 29 x 2.4 or 27.5 x 3” tires
  • Rack/fender mounts
  • Two sets of triple bottle cage mounts
  • ZS44/ZS56 tapered headtube
  • 31.6mm seatpost
  • 34.9mm seatpost clamp
  • Internal dropper post compatible
  • 148mm thru-axle
  • Belt drive compatible
  • Sliding dropouts with 20mm of adjustment
  • 73mm threaded bottom bracket
  • Under-the-downtube cable routing with bolt-on cable clamps
  • 5-year warranty to original owner, lifetime crash replacement




We build our Ti 420 frames in 1” increments all the way up to 24″. Just scroll to the right so see specs for our larger frames

Size 14 15 16 17 18 19 20 21 22 23 24
Seat Tube C-T 14in 15in 16in 17in 18in 19in 20in 21in 22in 23in 24in
Effective TT 21.5in 22in 22.5in 23in 23.5in 24in 24.5in 25in 25.5in 26in 26.5in
Head Tube Length 100mm 100mm 100mm 100mm 100mm 110mm 110mm 140mm 140mm 140mm 140mm
BB Drop 52mm 52mm 52mm 52mm 52mm 52mm 52mm 52mm 52mm 52mm 52mm
Head Tube Angle 67° 67° 67° 67° 67° 67° 67° 67° 67° 67° 67°
Seat Tube Angle 74° 74° 74° 74° 74° 74° 74° 74° 74° 74° 74°
Stack 605mm 605mm 605mm 605mm 605mm 614mm 614mm 642mm 642mm 642mm 642mm
Reach 385mm 386mm 398mm 410mm 423mm 435mm 447mm 451mm 466mm 476mm 489mm
Chainstay Length Sliding dropouts have a chainstay length range of 420mm—440mm
  • Geometry table is based on a 520mm axle-to-crown fork with 45mm offset, and a wheel diameter of 736mm
  • Seat tube length is measured from the center of the bottom bracket to the top of seat tube.