Pneumatic mountain bicycle or motorcycle tire having an inner tube compression puncture prevention device

A pneumatic mountain bicycle or motorcycle tire supported by the rim of a wheel, comprising:

• a tire casing fitted over the wheel rim;
• an inflatable inner tube within the tire casing;
• and
• a resiliently deformable ring disposed between the inner tube and the rim, the ring including a base supported within a radially outwardly facing channel of the rim, a radially outwardly facing inner tube supporting cradle situated beyond an outer periphery of the rim for preventing pinch flats of the inner tube during rapid compression of the tire casing into engagement with the rim, and an intermediate section extending from the base radially outwardly substantially beyond the outer periphery of the rim to an outer section defining the inner tube supporting cradle.

A pneumatic mountain bicycle or motorcycle tire supported by the rim of a wheel, comprising:

• a tire casing fitted over the wheel rim and having a pair of oppositely facing beads supported within a radially outwardly facing channel of the rim;
• an inflatable inner tube within the tire casing;
• and
• an inner tube puncture prevention ring disposed between the rim and the inner tube, having a base section supported within the outwardly facing channel of the rim, a radially outwardly facing inner tube supporting cradle situated beyond an outer periphery of the rim for preventing compression punctures of the inner tube during rapid compression of the tire casing into engagement with the rim, and an intermediate section extending from the base radially outwardly substantially beyond the outer periphery of the rim to an outer section defining the inner tube supporting cradle, wherein the intermediate section includes a neck having a reduced width relative to the base proximate to the outer periphery of the rim, the outer section has a width greater than that of the base, and wherein the puncture prevention ring comprises a resiliently deformable elastomeric material.