Berlin has some of the toughest streets on the planet.Berlin bicycle couriers asked us to give more puncture protection to their favourite tyre, so we did! The Berlin spec. High-densityanti-puncture version of Courier tyre has a 2.5mm thick Anti-puncture strip instead of the normal 1mm puncture protection system strip.Available only in Black.700 x 24C - Weight: 415g700 x 29C - Weight: 475g.Safety note: Hard compound gives increased wear resistance...but, should Only be used on rear position... as hard compound has reduced grip, which is not ideal for front tyre use.Please select non HC versions for front use.