Bar-ends add control, power, confidence and comfort.
I ride a Mountain-Bike on the roads now, with this handle-bars set-up. Comfortable and empowering providing more climbing power, more control cornering and more confidence with sketchy terrain especially crossing rail-road tracks. Acceleration and power increased as the bar end are in vertical alignment with your femurs, quads and hamstrings. It’s like having an extra gear or two instantly at your disposal.
Specialized makes a few lengths and curved bar-ends. Other manufactures make a number of varied shapes.
Cane Creek bar-ends are a bit more ergonomic and lower profile.
If you try this set-up I bet you’ll like it especially off road although once I took this bike on the smooth roads I haven’t gone back on the trail since. The speed was too alluring for me. This set-up is very fast and stable on the roads concrete bike trails and in the forest.
I run these Schwalbe Big Apples size 29 x 2.35. Fast, durable, amazing cornering, haven’t had a flat in four years.