I bought this beautiful piece because I often times an ordinary air pressure in the tires need but without a floor pump lugging around with me. The use of the Sclaverandventil fits properly on a Dunlop valve and can produce there inflate quickly and easily the air without loss. Furthermore, the pump is quickly and easily put into operation. What was quite amazing for the size and negligible weight and for me still. The only deduction is the attachment, this is made for mountain bikes or racing bikes, certainly offers me my bike not appropriately positioned sensor for the bolt / nut combination of the recording. What is advertised much by the manufacturer and in my practice as a proven absolutely correct is very easy passage of the piston, the only resistance is the aerodynamic drag on the valve. Conclusion: I would buy the good part again.
