Workshop knowledge, built into useful tools.
Compare vehicles, check fitment and calculate real-world specifications with the same practical references we use in the workshop. Free to use — no signup.
Choose your vehicle once. Let the tools do the rest.
Select make, model, generation and engine inside a calculator. Available factory values — including gearing, tyre size, wheel fitment and engine dimensions — load automatically and your choice stays saved on this device.
Choose a tool
Fast answers for common workshop decisions. Always verify critical fitment and safety values on the vehicle.
Gear Ratio & RPM Calculator
Pick a vehicle for factory ratios, or enter your own. Engine RPM at any speed in every gear, crawl ratio and top speed per gear. Compare a regear or tyre size change side by side.
Tyre Size & Speedo Error
Compare two tyre sizes: diameter and ride-height change, how far your speedo and odometer are out, extra clearance needed, and the axle ratio that restores your gearing.
Wheel Offset, Backspacing & PCD
Will they fit? Poke, inner clearance and track-width change between your current wheels and a new set, offset ↔ backspacing conversion, and a bolt-pattern measuring tool.
VIN Decoder
Year, manufacturer, plant, engine and trim from any 17-character chassis number, with a check-digit test. Sends the decoded vehicle straight into a parts request.
Service Schedule Planner
Build a maintenance schedule with UAE severe-service intervals, next-due by km and by date. Saves on your device, exports to calendar, CSV or PDF — and the tool itself downloads to work offline.
Compression Ratio & Displacement
Displacement and static compression from bore, stroke, chamber, gasket and piston dish. Shows what a head skim, gasket change or overbore does, and effective CR under boost.
Compare Cars
Pick any two vehicles from our technical database and compare engine, drivetrain, gearing, wheels and tyres side by side.
More workshop tools are coming
Fitment guides, torque references, part-number lookups and practical build notes. @n3worx
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