· All data without guarantee
Tire size calculator · Classic Mercedes
Tire size calculator for classic Mercedes: compare tire sizes for the 190E (W201), W124, R129 & more
Fancy re-shoeing your classic Mercedes, moving from the tame factory wheel up to 16 or 17 inch and Gullideckel, Aero, Evo or Penta wheels? Then one thing matters above all: the rolling circumference of the new tire size has to match the standard fitment, otherwise your speedo reads too far off and getting the combination approved becomes tricky. Our calculator makes working out the right tire size easy.
Standard fitments are guide values without guarantee. Your vehicle documents/COC are decisive.
| Old | New | |
|---|---|---|
| Diameter | ||
| Rolling circumference¹ | ||
| Circumference difference | ||
| Ground clearance | ||
| Speedo example | ||
¹ Simplified geometric circumference (diameter × π). Real manufacturer figures for the dynamic rolling circumference differ slightly from this.
Share your configuration with your tire dealer, your inspection body or other Mercedes drivers in forums and chats.
Size comparison
Matching size swaps for your original size
Common sizes in 15–18 inch within the tolerance of −2.5% to +1.5% (a proven rule of thumb from inspection practice), sorted by smallest deviation. Sizes marked with * fall into the yellow zone down to −4% and are often signed off in practice. Tapping applies the size as your target size. The suggestions only assess the rolling circumference, not the clearance in the wheel arch.
Gullideckel, Aero, Evo, RC90 or Penta in 16 and 17 inch: many wheel sets come as a complete set with free wheel bolts and hub caps, and shipping is free.
The rpmdepot tire size calculator
The tire size calculator is tailored specifically to classic Mercedes model series from the 1970s to the 1990s: choose the model series, set your target size, and you instantly see diameter, rolling circumference, speedo deviation and the change in ground clearance side by side.
The standard fitments stored here come from the official Mercedes-Benz release documents (“Permissible wheel/tire combinations”), supplemented for a few model series with carefully cross-checked secondary sources.
