The Schwalbe Romy Pro Tubeless Tire runs a classic diagonal casing, the right call for riders who want minimal rolling resistance and strong puncture protection without needing the radial carcass's extra grip and comfort. Gravity Pro construction adds an extra casing layer for stability, backed by Schwalbe's APEX fabric reinforcement for real puncture resistance on demanding trail and all-mountain terrain. Built for either wheel position on a trail bike or light-assist e-MTB, it delivers the same do-everything versatility as the Radial Romy, just tuned toward efficiency instead of maximum contact patch. What Our Gearhead(R) Experts Are Saying:"I noticed the difference on a long fire road climb where every bit of rolling resistance matters, and this tire never felt like it was working against me the way a grippier casing sometimes does. That's the entire reason a diagonal option still earns a spot next to the radial."