Diamondback Haanjo 6C Carbon Gravel Bike in for Test

Diamondback Haanjo 6C Carbon complete gravel bike

The Diamondback brand is known for value-oriented bikes and builds, making them a favorite especially among new riders. Me, I’m new to gravel bikes so I figured testing the Diamondback Haanjo would be a good place to start. There are eight Haanjo frame and build combos and I chose to check out the $2,550 Haanjo 6C Carbon build.

Test pilot profile height: 190cm (6’3″) weight: 72.5kg (160lb) testing zone: Southeast, USA

Diamondback Haanjo carbon frame and fork

The Haanjo carbon frame features disc brake mounts, 142x12mm rear axle spacing, and clearance for 700×37 or 650×47 tires. There are mounts for two water bottles inside the frame and another set on the underside of the down tube, seat stay mounts for a rack, and a slap protector installed on the chain stay. The carbon fork also features a 12mm thru axle and a couple mount points for accessories.

FRAME SIZE50cm53cm56cm59cm
Rider Height5’5″-5’8″5’8″-5’11”5’11”-6’2″6’2″-6’6″
Bike Stand Over Height788.0 mm808.0 mm834.0 mm858.0 mm
Bike Seat Tube Length500.0 mm530.0 mm560.0 mm590.0 mm
Bike Top Tube Length525.0 mm540.0 mm560.0 mm580.0 mm
Bike Head Tube Length130.0 mm155.0 mm175.0 mm200.0 mm
Bike Head Angle69.0 °70.0 °71.0 °72.0 °
Bike Seat Angle74.5 °73.5 °72.5 °72.0 °
Bike Wheel Base1028.0 mm1025.0 mm1025.0 mm1028.0 mm
Bike Chain Stay Length430.0 mm430.0 mm430.0 mm430.0 mm
Bike Fork Offset45.0 mm45.0 mm45.0 mm45.0 mm
Bike Bb Height280.0 mm280.0 mm280.0 mm280.0 mm
Bike Bb Drop70.0 mm70.0 mm70.0 mm70.0 mm
Bike Stem Length80.0 mm90.0 mm100.0 mm110.0 mm
Bike Handlebar Width440.0 mm440.0 mm460.0 mm460.0 mm
Bike Crank Length170.0 mm172.5 mm172.5 mm175.0 mm
Bike Seat Post Length350.0 mm350.0 mm350.0 mm350.0 mm
Bike Stack543.0 mm570.0 mm593.0 mm622.0 mm
Bike Reach374.0 mm371.0 mm373.0 mm378.0 mm
Bike Fork Length395.0 mm395.0 mm395.0 mm395.0 mm
Diamondback Haanjo geometry table

Diamondback describes the Haanjo geo as “endurance geometry,” though it appears that’s in reference to comfort over long distances rather than endurance racing per se. Depending on the frame size, the head tube angle ranges from 69° on the smallest size to 72° on the largest (59cm, tested). Similarly, the seat tube angles range from 74.5° to 72°.

Other notable frame specs include a 27.2mm diameter seat post, internal cable routing in the frame and fork, and front derailleur compatibility.

Diamondback Haanjo 6C Carbon build specs

The Haanjo 6C is the most affordable carbon build available, and it’s also one of the few that features 650c wheels and a 1X drivetrain. The wider 650c tires and MTB-like single chainring help tip this build closer to the singletrack end of gravel riding compared to the others Diamondback offers.

Staring at the cockpit, the aluminum drop bars are shaped with a 12° flare and are bolted to a HED alloy stem. The bars are wrapped well and have a thick, cushioned feel compared to a typical road bike setup. SRAM Rival 1 brake levers complete the front end while a WTB Silverado Race saddle sits atop an alloy HED fixed seat post.

The Haanjo 6C comes with an 11-speed drivetrain configured with a 38T Praxis Cadet crankset and a SRAM 11-42T cassette. The combo should be well geared (ha!) to riding gravel roads and even singletrack, but likely won’t allow me to keep up with friends on the road.

HED Tomcat alloy wheels are wrapped in WTB Venture Plus tubeless tires. The brakes are TRP Spyre mechanical models gripping 160mm rotors front and rear.

All together, the 59cm build I have in for test weighs 9.8kg (21.6lb) with Shimano XT pedals installed.

Time to hit the (gravel) road

This spring I’ll be testing the Diamondback Haanjo 6C Carbon gravel bike anywhere and everywhere a bike can go. I’m especially interested in riding to, and on, some farther-flung singletrack trail networks from my house. Stay tuned for a full review.

  • Price: $2,550. Other builds are priced between $785 and $4,650.
  • Available from Diamondback.

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