The Diamondback Haanjo 4 is very versatile with wide 37mm WTB Riddler tires. These allow riders to traverse gravel roads and double track.
Experts were pleased with the budget-friendly price of this bike.
The geometry is not extremely aggressive. It did not cause fatigue on one tester's back after long days in the saddle.
The Shimano rear derailleur has a clutch. This minimizes chain slap noise.
The short reach increases the bike's responsiveness and agility.
A front and rear rack can be attached to the Haanjo 4, allowing riders to utilize it on a bikepacking adventure or their daily commute.
There are mounts for fenders on the bike.
On a size medium, the wheelbase is 1041cm. A long wheelbase like this creates a stable ride.
The flat mount hydraulic disc brakes by Shimano engage quickly and have a sleek appearance.
The sealed threaded bottom bracket is easy to maintain.

2 reasons not to buy

Riders looking for an aggressive gravel bike will find the stem is short on the bike. For a racier riding position, testers suggest swapping the stem for a longer one.
One user found customer service was difficult to deal with when their bike arrived damaged.

Bottom line

The Diamondback Haanjo 4 is an aluminum gravel bike. It has mounts for racks and fenders, allowing riders to use it to commute on or for their next bikepacking trip. It has quality Shimano hydraulic disc brakes and a Shimano drivetrain. The short reach creates a reactive and agile feel on the bike. Users and experts have few complaints. One rider noted customer service was not responsive. Another tester found the stem was short and their position was too relaxed.