Optimus Tire

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The Optimus 2.4" is designed to deliver confidence inspiring trail traction with lower roll resistance at XC/Down Country weights. Everything about the Optimus is optimized for long Epic days in the saddle. 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 sidewall knobs, for minimized rolling resistance, 30% higher durability and wear-life, and biting traction in the corners and off-cambers. Choose between XC and Trail casings, depending on your size, style, front/rear tire preferences or conditions. Optimus XC has a single ply 120tpi casing with tubeless insert for ultimate suppleness and dependable air retention. The Optimus Trail casing is single ply 72tpi casing with tubeless insert, but takes advantage of a Nylon Breaker under the tread for heightened puncture protection and a more supportive feel in rougher terrain. 

The Optimus' tread pattern was engineered with shorter, tightly spaced center knobs, which create a more efficient rolling contact patch through the center tread. This also enhances acceleration and climbing properties. Center knob sipes alternate between parallel and perpendicular to enhance both braking and cornering traction. More widely spaced transitional knobs help to control traction consistency and predictability when transferring through lean angles while self-cleaning effectively. Sidewall knobs are designed with a sophisticated profile to dig into looser terrain during aggressive cornering, and hook up on off-cambers. Horizontal upper sipes and arched cutaways with accordian side sipes help to improve flexibility in uneven terrain, while controlling sidewall knob deformation and roll-over at high lean angles. 

Whether you call it XC, Down-Country, or Light Weight Trail, the Optimus 2.4" is here to make your next ride longer, faster and more fun.


  • Faster rolling tires for efficiency and speed up the climb and extend your range
  • High volume casing and unique tread lets the rider push with the control of a trail tire
  • Special “endurance” compound adds to efficiency and offers 30% longer tread wear

Looking for guidance on which tire to get? Check out our guide HERE.


  • Low roll resistance design
  • Trail capable traction with XC weight
  • High efficiency, low wear rate compound
  • Available in XC or Trail casings.
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Product Spec

Tubeless ready for 29 and 27.5” wheels
Endurance: Medium tack 50a side knobs, harder 56a center and base compound for better tread wear life and faster rolling.
XC: 120tpi single ply, tubeless insert
TR: 72tpi single ply, tubeless insert, Nylon breaker under tread
Nylon Breaker: Increases tread puncture resistance and air retention
Tubeless insert: Increases sidewall air retention
27.5", 29"
29”: XC/ENDURANCE - 738g TR/ENDURANCE - 811g
27.5”: XC/ENDURANCE - 698g TR/ENDURANCE - 766g

Tech Info

Guaranteed to be free from defects in materials or workmanship for 5 years after original purchase