Protection level 1. The CST Classic Breaker 28" clincher tire is a popular choice because of its puncture protection layer. This tire is suitable for city bikes and electric bikes. It is black and made of rubber. The Breaker has a modern tread pattern and a sturdy puncture protection layer, making it extra durable and less likely to puncture. With a weight of 730 grams and a maximum pressure of 5.2, this tire is suitable for e-bikes with pedal assistance up to 25 km/h. The tire has an inch size of 28 x 1 3/8 and an ETRTO size of 37-622. The CST Classic Breaker is supplied without folding and has reflective details. Product specifications: - Model: Breaker - Profile: C1838 - Tire size: 37-622 millimeters (ETRTO), 28 x 1 5/8 x 1 3/8 inch - TPI: 22 - Type: clincher tire - Weight: 730 grams - Compound: single - Max PSI: 75 - Anti-puncture: APL - Suitable for E-bike (max 25 km/h)