Rubber Imported MAXXIS ARDENT: The Ardent is an excellent all-condition tire that features fast rolling, ramped center knobs, with large block side knobs to provide excellent cornering traction. DUAL COMPOUND: Two distinct rubber compounds are used within the tread to offer a balance between rolling resistance and grip. EXO: A cut and abrasion-resistant material added to the sidewalls of many of our gravel and MTB tires. Suitable for use in a wide range of riding applications from gravel to XC to light trail duty. QUALITY GUARANTEE: 1-Year Manufacturer's Warranty