Schwalbe Marathon Racer tyres are the lightest and fastest marathon tyres in the Schwalbe line up. RaceGuard for good puncture protection. SpeedGrip Compound for the best handling characteristics. LiteSkin sidewall. Schwalbe Marathon Racer tyres Features: 700x38c (40-622 or 28 x 1.50) Schwalbe Marathon Racer tyre. RaceGuard puncture protection: Double layer of Nylon fabric under the tread. Excellent puncture protection for a tire that should be fast and lightweight. 2 layers of crosswise Nylon fabric. Reflective band. Wire bead. Weight: 495g (17oz). EPI: 67. Recommended pressure range: 55-85 psi (4.0-6.0 bar). Maximum load: 105 kg. Schwalbe protection level 4. E-Bike Ready.