TECHNICAL INFORMATION
Rims
Nomenclature for rims
Nomenclature
1 – Width of the rim or distance between flange (L)
2 – Nominal rim diameter (D)
3 – Inspection diameter (DI)
4 – Internal diameter of the rim (DL)
5 – Rim flange
6 – Flange width (LF)
7 – Flange height (AF)
8 – Flange radius (RF)
9 – Location of the radius of the flange (AR)
10 – Upper radius of the flange (RS)
11 – Conical seat
12 – Conical seat angle
13 – Conical seat width (LT)
14 – Conical seat radius (RT)
15 – Round hump (RH)
16 – Diameter of the round hump (DR)
17 – Hump radius (RU)
18 – Flat hump (FH)
19 – Diameter of the flat hump (DF)
20 – Rim recess
21 – Lower radius of the recess (RI)
22 – Recess width (LR)
23 – Recess location (B)
24 – Depth of recess (PR)
25 – Top radius of the recess (RR)
26 – Angle of recess (RA)
27 – Hole or slot for valve
28 – Diameter of the valve hole (DV)
29 – Location of the valve hole (V)
30 – Location of the upper radius of the flange (LS)
Notes
1 – Items 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21, 27, 28 and 30 are for both sides of the rim.
2 – Items 16, 18, 23, 25 and 26 are only for the tire mounting side.
3 – The dimensions specified on the drawings are in millimeters (mm).
4 – For 400 mm millimeter rims (not recommended for new projects), see Technical Standards Manual 1982.
The code letters refer to the Nomenclature and Basic Dimensions for Rims, contained in the General Information chapter.