45NRTH Kahva Tire - 27.5 x 2.1, Tubeless, Folding, Black, 60 TPI, 240 Concave Carbide StudsFrom light winter trail riding to commuting, the Kahva allows you to carve your way through winter with concave carbide studs as well as single, double and triple siped lugs. 240 carbide studs 60 TPI We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre mature casing wear and stud loss. Always check with your rim