The HDR frame is slightly lighter than the HD, around .3 -.4 lb (depending on size and color), yet is stronger and of equal stiffness. We’ve employed a new, more precise molding technique similar to that used in the Mojo SL-R to get the weight down.
By shifting around our linkage locations, we’ve managed to add ISCG 05 chainguide mounting functionality and dramatically increased the front derailleur compatibility across both the 2X and 3X spectrum. We’ve also increased clearance for the new 11 speed cogsets.
With some other tweaks to the frame, we’ve made the frame compatible with Fox’s new lighter weight XV air cans on the CTD shocks. We’ve also added clearance for their new Float X piggy back shock.
The HDR is an extremely versatile bike. It can be setup a number of different ways, for a number of different types of riding. You can easily change front or rear travel and change wheel size to dial in the right ride for you.
Note that the HDR and the HDR 650b share the same frame. We change the stroke and length of the shock, along with its location on the frame, to give two very different setups with unique ride characteristics.
Our stock 650b setup has 130mm travel. By swapping out the “limbo chips” and changing the shock, you can easily change the bike to a 160mm travel bike for 26″ wheels. You can also run the HDR 160mm setup with 650b wheels. You just need a travel limiter on the shock (otherwise the tire will rub the seat tube), reducing it to 150mm of rear wheel travel. That version is called the HDR and you can see it here.
Here is a picture of the limbo chips:
The HDR features a mixed tapered headset with a 1.5″ lower and a 1.125″ upper. The 1.5″ lower provides an exceptionally rigid front end platform. Combined with the through axle fork and our very stiff front end layup, you’ll be amazed at the precision found in the front end, particularly when pushing hard. The HD is also compatible with the King InSet 3 headset.
With the popularity of the 11 speed cogsets on the rise, we’ve increased the clearance at the drive side dropout to allow for most hub/cassette combinations. We like the 11 speed drivetrains when utilized with a 32 or 34 cog, they nicely match the suspension kinematics that way.