Tubes 27.5" (650B)

The 27.5" tyre and wheel size now look set to become the standard mountain bike size over the next few years. It's also known as 650B and is, like other sizes, an old size resurrected, and in this case, given a new (and confusing) name. The important dimension is 584 - that's the ETRTO number for this rim and tyre size - it's the diameter in mm of the tyre bead seat in the rim, and is the internal diameter of the tyre.

Giant Tube 27.5 x 2.1-2.4 PV48

Schwalbe Tube #21 Freeride 650b Presta

Tioga Tube 26 x 1-3/8 SV


Tube 27.5 x 1.75 - 2.125 PV48

Tioga Tube T/Resist 27.5 x 1.9/2.1 PV48

Tioga Tube T/Resist 27.5 x 1.9/2.1 SV

Schwalbe SV12 26x1.75 584-40