Slime lite smart road tubeslime light smart tubes have the sealing power of our standard tubes minus the weight they instantly and repeatedly seal punctures for up to 2 years tubes are pre installed with slime and provide maximum puncture protection with minimal added weight that means longer distances faster times and no flat tyres 700 x 18 25mm prest designed to seal tread area punctures valve type presta 48mm fits tyre sizes 700 x 19 25mm weight 117g700 x 28 35mm presta designe