Instant Decoder Live
VIN Number Lookup & Spec Decoder
Decode any 17-digit truck VIN to find factory engine specs, drive type, cab configuration, GVWR, and match exact compatible parts and fitment shelves.
Automotive Tools Free & Instant
Truck Fitment Tools & Spec Decoders
Decode your truck's 17-digit VIN number, generate a digital factory Monroney window sticker, and evaluate tire, wheel, and suspension geometry calculations before placing part orders.
Available & Upcoming Tools
7 Tools in Suite Monroney Generator Live
Original Vehicle Window Sticker Reconstructor
Generate a digital Monroney-style window sticker with decoded factory build data, safety ratings, engine specs, and direct OEM sticker lookup portal links.
Tire Calculator Roadmap
Tire Size & Speedometer Offset Calculator
Compare OEM tire dimensions vs oversized truck tires. Calculates overall diameter, section width, revs per mile, ground clearance delta, and speedometer error percentage.
Wheel Geometry Roadmap
Wheel Offset & Backspacing Visualizer
Calculate inner suspension clearance change and outer fender poke when swapping factory wheel width and offset (+44mm to negative offset).
Suspension Math Roadmap
Truck Leveling Rake Calculator
Enter hub-to-fender measurements to calculate exact factory rake in inches and determine the optimal spacer/strut lift height without reverse rake.
Tire Pressure Math Roadmap
Tire Load & Cold Inflation PSI Converter
Calculate proper cold tire PSI when switching between P-metric standard load tires and LT Load Range E 10-ply tires using TRA load-inflation tables.
Reference Guide Roadmap
Bolt Pattern & Lug Torque Reference
Look up truck bolt patterns (e.g. 6x139.7, 6x135, 8x180, 8x170), center bore, lug thread pitch, and factory dry lug torque specs.
Why Fitment Calculations Matter
Most truck part returns happen because of minor trim mismatches, unexpected cab length variations, or miscalculating wheel backspacing against suspension knuckles. Our tools bridge factory vehicle build sheets with verified aftermarket fitment databases so you buy the right part the first time.