Optimus Tire Casing:Trail Sidekick anti-kickback hub technology eliminates

Sidekick anti-kickback hub technology eliminates kickback and filters drivetrain vibration

ALL e*thirteen Cassettes utilize two-piece construction

The Optimus' tread pattern was engineered with shorter

On legacy and XCX cranks the Guidering SL will achieve a 49mm non-boost chainline

with a firm base layer and center knobs

Optimus Tire Casing:Trail Sidekick anti-kickback hub technology eliminatesThe Optimus 2. 4" is designed to deliver confidence inspiring trail traction with lower roll resistance at XC Down Country weights. The 2. 4'' high volume design promises the comfort of burlier trail tires and the same ability to run lower air pressures, but a tread and casing configuration that targets maximum rolling efficiency . The Optimus features e*thirteen's Endurance compound, with a firm base layer and center knobs, and softer medium tack