Vehicle with spherical wheels

A vehicle comprising:

• a frame;
• a front ground-engaging sphere which is rotatable about a first axis which is transverse and fixed relative to the frame;
• a rear ground-engaging sphere which is rotatable about a plurality of axes;
• gripping portions connected to a front portion of the vehicle, for a rider to hold;
• and
• a support, wherein the support is connected pivotally to a rear portion of the frame and wherein the rear sphere is connected to the support for rotation about a second axis which is transverse and fixed relative to the support;
• wherein the support is pivotal with respect to the frame about a third axis which extends downwardly and longitudinally of the vehicle, such that the support is pivotable through a range of positions, said range of positions including a neutral position wherein the first and second axes are parallel;
• wherein the vehicle further comprises a resilient biasing mechanism configured to resiliently bias the support towards the neutral position;
• and
• wherein the resilient biasing mechanism is configured to convert a rotational motion of the support into a linear motion of a translatable member, wherein the linear motion of the translatable member applies a force to a resilient member of the resilient biasing mechanism, thereby applying a mechanical stress to the resilient member or increasing a mechanical stress applied to the resilient member.