Flexible adapter and rim assembly for a rolling assembly

An assembly of a rim and of a flexible adapter, configured to make up, with a tyre, a rolling assembly, the rim having an axis of rotation and a median plane, the rim having a mounting well that is extended axially at least on one side of the median plane by:

• a boss;
• a rim seat;
• and
• a rim flange that extends the rim seat axially on the outside, the rim flange having a first portion defining a bearing face and oriented substantially in a plane perpendicular to the axis of rotation of the rolling assembly and situated radially on the outside relative to the rim seat, a second, substantially frustoconical portion, which is situated axially on the outside relative to the first portion and situated at least in part radially on the outside relative to the rim seat, and a connection portion between the first portion and the second portion;
• wherein the rim seat has a substantially cylindrical portion that is extended axially on the inside by a connection zone with the boss and is extended axially on the outside by a connection zone with the rim flange;
• the adapter having:
• an axially inner end defining an inner adapter bead configured to rest on the rim seat;
• an axially outer end;
• and
• a substantially cylindrical body that connects the axially inner end and the axially outer end and is configured to receive, in cooperation with the axially outer end, a tyre bead;
• wherein the rim seat of the rim has an inclination relative to the axis of rotation of between −2 and +6 degrees;
• wherein the axially inner end having a first positioning face substantially perpendicular to the axis of rotation, and a substantially cylindrical second positioning face;
• and
• wherein during mounting of the adapter on the rim seat the second positioning face of the adapter is configured to undergo a contraction which presses the first positioning face of the adapter against the bearing face of the rim flange whereby the inner adapter bead is in a definitive position on the rim seat and can no longer move axially once mounted on the rim.