Jones Steel Diamond Frame with Titanium Truss Fork

$1,600.00 $1,440.00
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Jones Steel Diamond Frame with Titanium Truss Fork

Steel Diamond frame and Titanium Truss fork (frameset)

This is the Jones geometry (and superb handling) as a traditional diamond frame. This, being easier to build, costs less than the Spaceframe version, and while it doesn't offer the same compliance, the seat and seat stay tube dimensions have been carefully selected to both improve the ride and reduce the weight.

Construction: The frame is TIG welded 4130 chromoly with a butted down tube. The cable guides and bottle bosses are brazed on. The latest versions (above) have a clear powder coating, over the decals, on top of the tough powder coat paint finish for appropriately rugged good looks. A full range of frame-fitting bags are available for bikepacking and touring capabilities.

For drivetrain and wheelset suggestions and requirements, please look at the Jones Plus 148 supplemental manual on our manuals and guides page. 

The fork is titanium (Around 370 grams lighter than the steel Truss and 485 Grams lighter than the steel Unicrown fork)

  • The fork is compatible with 135mm front hubs such as the Jones 135-F and the Paul Whub (not 135mm rear hubs).
  • BB is 68mm wide
  • Frames include a Bushnell featherweight EBB (EBB not shown), one derailleur hanger, one singlespeed dropout insert and bolts.
  • Fork bolts, bottle bolts and the hanger nut and bolt are stainless steel.
  • Truss forks include an aluminum steerer tube.
  • The Truss fork does not use a normal press on crown race- Information about the headset options.
  • Seat post size is 27.2mm
  • Seat post clamp size is 31.8-32mm
  • Rear tire clearance up to a 29 x 2.5" on a 50mm wide rim.

Our blog has more frame information and some bikes that Jeff and our customers have built:

Frame details

Singlespeed with 29" wheels

Singlespeed with fat front wheel

Bike pack and camp

Why this bike? It's a high performance non-suspension bicycle... instead of designing the bike for XC-racing like so many unsuspended bikes. I wanted this bike to be better for technical and distance riding... Since this bike is not designed around a suspension fork I'm able to do much more to improve the handling. By designing the frame and fork together and considering the larger wheels I'm able to make a bike that rides very differently to a 'normal' rigid bike (be it 26 or 29er) with a short rake fork.

My bike has a slacker seat-tube and a shorter top-tube than 'normal' bikes... the head angle and rake with this wheel size (more rake, slacker head-tube-angle and bigger wheel) determines the trail which helps determine the handling. Slacker angles keep the rider's weight off the hands and makes the front end easy to lift; the center of gravity is moved back and down for more control, with less shock to the upper body, more traction under braking, and a bike that is much harder to endo. This bike feels quick but also has a laid back feel. It's the best handling bike I've designed.


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  • 5
    Steel Diamond w/Ti truss fork 29er

    Posted by Rick Thompson on 15th Jun 2017

    Holy cow this bike rails! Set up as SS with 2.4's on scraper hoops fyi. By far the best bike I have owned and I have owned ALOT of bikes over the years... This one has ruined me for all other bikes for sure! If you don't plan on throwing down the cash for one, don't test ride one.... lol. Thanks for such a great bike Jeff!