POLAR BEAR 20x4 foldable ebike tire 1 tire Ebike recommended: meaning this tire have extra nylon and rubber than the regular bicycle POLAR BEAR 20” x 4” bicycle fat tires 60 TPI. *POLAR BEAR tires has spacious and siped lugs which keeps rolling resistance at a minimum even when air pressure is low. * It has good traction which provides additional grip in sand, snow and other unfavorable conditions due to large siping of lugs. * Tire is strong, durable and suitable for different road conditions. * 60 TPI hence it's stronger, harder, tough and more puncture resistance it’s not puncher proof
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