Know the exact size before you buy
Tools that compute, compare and recommend sizes — so you get it right the first time.
The tools
Three focused tools that answer every sizing question.
Decode any size into its full spec in mm, with a side-by-side size drawing and a built-in size guide.
Draw two sizes side by side to true scale and see the height, width and speedometer differences.
Every alternative and plus-size per rim, ranked by fitment safety with the speedometer error.
Battery tools
Tools to help you choose and understand your car’s battery — before you buy and before you visit a mechanic.
Car won’t start? Find the likeliest cause: battery, alternator or starter.
Have an old code (DIN74 / NS70) or amps? Find the equivalent and what we stock.
How to read a code, the battery types, and why the production date matters in Egypt’s heat.
Find the right amps for your car in Egypt’s heat, and whether you need EFB, AGM or a regular battery.
Pick your make, model and year and we’ll tell you the right battery.
Stay inside the ±3% diameter window
Any alternative size should keep its overall diameter within 3% of the original — so your speedometer, odometer, gearbox and safety systems stay accurate.