Hardcase HNKIT21 - 50mm Wheel Set (8mm Bore) for Hardcases – Pack of 2

Hardcase HNKIT21 - 50mm Wheel Set (8mm Bore) for Hardcases – Pack of 2

The HNKIT21 Hardcase set is a pair of 50mm diameter wheels with an 8mm hub , designed as a replacement for Hardcase cases with an 8mm axle. These are heavy-duty wheels for intensive use, designed to restore the mobility of trunks and cases with integrated wheels (bass drums, timpani, sets, or large-format cases) without modifying the original hardware. Mounting is direct onto the existing 8mm axle/stud , maintaining the stability and stackability of the Hardcase system.

This pack includes 2 wheels and is the standard replacement size for many models with wheels from the brand (for example, HN28W, HN36W, HN40W, HN48W and wheel combos), as long as they use an 8 mm axle . To avoid purchasing errors, keep in mind that in the official Hardcase nomenclature the 50 mm wheel is identified as KIT 20 ; some stores show the commercial reference HNKIT21 for the same 50 mm replacement. If you need a larger diameter, the 75 mm wheel is listed as KIT 21 .

Main features

• Wheel diameter: 50 mm.
• Bushing/bore: 8 mm (≈ 8.10 mm nominal on distributor data sheet).
• Compatibility: Hardcase cases with 8mm shaft (e.g. HN10-12C, HN12-13C, HN13-14C, HN14-15C, HN28W, HN36W, HN40W, HN48W).
• Package Content: 2 wheels.
• Construction: “heavy duty” wheel for intensive use.
• Installation: Direct replacement over existing 8mm axle/stud.

Product benefits

• Easy maintenance: restore smooth, stable rolling by simply changing the wheels.
• Clear compatibility: standard size (50 mm / 8 mm) used in numerous models with Hardcase wheels.
• Durability: Heavy-duty design prepared for frequent loads and continuous transfers.

Reference and Compatibility Notes

• Official Hardcase reference: The 50mm wheel is identified as KIT 20 (pack of 2; 8mm hub). The 75mm wheel is KIT 21 .
• Trade name: Some catalogs/retailers list HNKIT21 as “50 mm / 8 mm – 2 units”; check the diameter and bushing (8 mm) you need.
• Axles, screws, and washers are not included ; those in the case can be reused if they are in good condition.

Description for projects

50 mm Hardcase Wheel Set for cases with an 8 mm axle. Pack of 2. Heavy-duty wheel with 8 mm hub (≈ 8.10 mm nominal). Compatible with numerous wheel models (e.g., HN28W, HN36W, HN40W, HN48W), direct replacement for the existing axle. Official manufacturer's reference for 50 mm: KIT 20.