A large-chamber hand pump for larger-volume rubber that also has a reversible head. Large-chamber hand pump for larger volume rubber that also has a reversible head. Mount an attack against flats Mount an attack against flats Minimise your time off the bike during trail-side flat tyre fixes with the high-volume Air Support HV hand pump. A large chamber allows you to inflate tyres up to 60 psi with ease, and a reversible valve head means that you can quickly switch from Presta to Schrader without hassle. This durable pump fits easily into your hydration pack, or use the included bracket to mount it under your bottle cage. Minimize your time off-the-bike during trail-side flat fixes with the high-volume Air Support HV hand pump. A large chamber allows you to inflate tires up to 60 psi with ease, and a reversible valve head means you c - A durable, high-quality MTB pump with larger volume ...