Top Features for Athletic Trail Novices. Even when entering the athletic hardtail category, STEVENS does not compromise on quality – instead, the Sentiero impresses with its high-quality aluminum frame featuring a tapered head tube and forged post mount brake mounts, a complete Shimano SLX/Deore 1x12 drivetrain, and the same agile geometry with frame-height-specific wheel sizes as the top model Colorado 401. Or are you drawn to the extravagant "Python" look of the Sentiero?