A tube or tubular tyre with a valve that can be unscrewed is required for mounting. With very high rims, it is sometimes necessary to screw several of the lightweight aluminium tubes together. The advantage over extensions that are screwed in front of the valve: No air can escape between the valve and extension when pumping.
PLUS Perfectly customisable, easy pumping, less imbalance in the impeller
MINUS ---
Price 6 to 8 euros per pair including plastic spanner for mounting Lengths 20, 30 and 40 millimetres (Continental), 17 and 31 millimetres (Schwalbe)
Weight 1.1 gram per 20 millimetres
Reference/Info www.conti-online.com | www.schwalbe.de