Bobbins and waisted rings are the small running parts fitted to the curtain rail of an HGV, truck or trailer curtain-sider, sitting between the sheet and the rail so the curtain travels smoothly rather than dragging or catching. This range covers solid bobbins (codes starting BOB), bearing bobbins that run on their own internal bearing for a smoother, quieter action (codes starting WBA), and the steel waisted rings (WR1, WR2) that seat a bobbin on the rail.
Each part is listed by its exact model code and outside diameter x width, so you can match it directly against the worn bobbin or ring you're replacing. A flattened, cracked or seized bobbin will drag on the curtain sheet and slow down loading, so it's worth checking the neighbouring bobbins on the same rail while you're fitting a replacement.
All parts in this range are supplied by LoadMonkey as genuine-fit spares for commercial curtain-sider fleets, workshops and owner-drivers.