safety bead seat

safety bead seat
A general term for a safety contour on the rim bead seat preventing the tire bead from sliding into the rim well especially during cornering maneuvres

Dictionary of automotive terms. 2015.

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  • bead seat — The portion of the wheel rim below the rim flange providing radial support to the bead of the tire. See also rim bead seat taper rim bead seat safety bead seat …   Dictionary of automotive terms

  • seat — [1] A surface upon which another part rests or seats. Example: valve seat is matched surface upon which valve face rests. [2] Minor wearing of the piston ring surface during initial use. Rings then fit or seat properly against the cylinder wall.… …   Dictionary of automotive terms

  • safety wheel — A general term referring to either a wheel with a safety bead seat or a wheel with run flat properties …   Dictionary of automotive terms

  • safety ledge — A raised area (hump) around the circumference of the bead seat area of passenger wheels. Its function is to prevent the tire beads from becoming unseated during hard cornering or while running with low air pressure. A must with tubeless passenger …   Dictionary of automotive terms

  • hump — A raised portion on the rim bead seat of passenger car wheels, retaining the beads of an insufficiently inflated tubeless tire on the bead seats, thereby preventing the tire beads from jumping into the rim well. Also see flat hump hump rim… …   Dictionary of automotive terms

  • hump rim — designation for a rim featuring a safety contour (round hump, flat hump, combination hump) either on the outer or on both bead seats. This protection is particularly important with tubeless tires, where sudden deflation can occur if the tire… …   Dictionary of automotive terms

  • passenger car wheel — A one piece wheel made of sheet steel. The rim and disc are welded together or made of light alloy (cast or forged), and designed for tubeless tires. Rims for passenger cars are almost exclusively designed as 5° drop center rims incorporating a… …   Dictionary of automotive terms

  • special ledge — (SL) A safety bead seat contour mainly used on American passenger cars …   Dictionary of automotive terms

  • outboard contre pente — Safety contour for tubeless passenger car wheel rims, featuring a contre pente on the outer bead seat …   Dictionary of automotive terms

  • Rim (wheel) — The rim is the outer circular design of the metal on which the inside edge of the tire is mounted on vehicles such as automobiles. [ [http://www.motorera.com/dictionary/RI.HTM#Rim Rim as defined by the Dictionary of Automobile Terms, undated] ,… …   Wikipedia

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