Reverse drop-center rims and special wheels: accessories and correct procedures

Workshops, tire specialists, and dealerships are working on an increasingly diverse range of wheels and rims. Alongside traditional wheel assemblies, technicians frequently encounter reverse drop-center rims, wheels with pronounced offset, and oversized custom wheels—each with its own distinct geometry and handling demands.

Successfully managing these jobs requires an accurate working procedure and, when necessary, dedicated accessories, always in full compliance with the user manual instructions. What truly makes the difference is having the right methodology and proper positioning.

In this guide, we clarify what is meant by special wheels, what the manufacturer’s manual prescribes, and how to handle them with complete control and total rim protection.

Reverse drop-center rims and special wheels: what we are talking about

By special wheels, we mean configurations that diverge from standard rims and demand targeted handling attention. This category includes, for example, reverse drop-center rims (where the drop center is positioned closer to the inside face of the wheel), wheels with pronounced high offset, rims with blind/closed center bores, non-OEM custom wheels, and large-diameter oversized rims.

These wheel types are widespread across today’s vehicle fleet, and a professional workshop encounters them on a regular basis. Each possesses unique geometry, dimensions, and finishes that dictate how the wheel must be secured and handled throughout demounting and mounting.

Intended use and limits specified by the manufacturer

The user manual defines the intended operational scope of the tire changer: professional mounting and demounting of tires on passenger car wheels, within specified dimensional boundaries. This covers all passenger tire categories, including Eco, Touring, Grand Touring, High Performance, Ultra High Performance, Max/Extreme Performance, and Run-Flat tires, when used with appropriate accessories and in strict accordance with manual guidelines.

Automatic operation is engineered for the vast majority of standard applications. However, specific tire or wheel characteristics may require manual operator assistance—such as extreme tire carcass rigidity, internal construction, advanced wear, or non-standard wheel profiles.

The machine is not designed for wheels from other vehicle classifications, such as light commercial vehicles, pickup trucks, agricultural machinery, heavy commercial trucks, or specialized applications, including bulletproof or run-flat armored insert assemblies, even if dimensional capacities might superficially seem compatible. Operating outside the intended scope is the sole responsibility of the operator. The user manual remains the authoritative technical reference, which this article is not intended to replace.

The correct procedure before the machine

When facing a special wheel, the primary question to ask is how to execute the job properly, rather than simply which machine is required. What matters most is following the correct sequence, utilizing the appropriate accessory when specified, and ensuring accurate wheel clamping on the turntable.

This disciplined approach applies across every model in the range and must always align with user manual instructions.

Accessories and optional equipment for special wheels

For certain unique wheel designs, dedicated optional accessories and adapters provide vital assistance, allowing operators to handle rims with non-standard geometry safely and with total control. Using the correct accessory according to manufacturer procedures ensures superior handling precision and maximum protection for the wheel rim.

For the majority of daily workshop routines, specialized accessories are not required. If you encounter specific demands or must work on highly unconventional wheels, contact the manufacturer or authorized service network for the complete list of certified optional accessories.

Proper wheel and accessory positioning

Wheel positioning is where the success of the entire operation is decided. A wheel properly centered and locked onto the self-centering clamping unit, with any required accessory oriented as intended, enables precise tool engagement and substantially minimizes error risks.

Reverse drop-center rims and large-diameter wheels demand heightened vigilance, as their specific geometry requires rigorous control during every phase. Carefully preparing the wheel and accessories prior to commencing operations ensures a smooth, repeatable procedure. When wheel characteristics require it, the technician must always be ready to step in manually as specified by the manual.

Rim protection and Leverless technology

Special wheels frequently include valuable, cosmetically delicate, or oversized alloy rims where surface preservation is paramount. All Devel tire changers feature Leverless technology and operate completely free of metal tire levers contacting the rim surface.

On delicate painted, diamond-cut, or polished finishes, this eliminates the risk of scratching the rim during tire removal and installation. Learn more in our article dedicated to the advantages of the Leverless tire changer. This ensures customer wheels receive the same meticulous protection given to every standard job.

Automation and repeatability even on special wheels

A higher tier of automation delivers greater workflow repeatability, especially across standard daily jobs. Between different machine models, the level of automated system intelligence varies, while the application parameters stated in the user manual remain consistent.

In the Devel range, the TOP AUTOMATIC 5.0 offers the most advanced automation for passenger cars, reducing operator intervention during key operational phases. On wheels with demanding structural features, however, operator oversight remains essential. To determine which automation tier best fits your workshop, read our comparative guide on automatic or semi-automatic tire changers.

On any special wheel, correct procedure, precise positioning, and faithful adherence to user manual guidelines remain the decisive factors common to the entire Devel range.

Discover the Devel range of professional tire changers and evaluate the model best suited to your workshop’s needs.