Help · Guides & tools

Help Center

Step-by-step how-to guides, part finders and calculators for tires, wheels and the tools to service them.

A tire under a magnifying glass, with a wrench and a ruler

How-To Guides6

How to Measure a WheelDiameter, width, bolt pattern and offsetOpen the guide How to Install Tire ChainsDrape, fasten, tension and retightenOpen the guide How to Repair a TireWhen it can be fixed, then plug and patchOpen the guide How to Torque Lug NutsSpec, star pattern, stages and re-torqueOpen the guide How to Mount and Seat a Tire SafelySafety rules and the 40 psi limitOpen the guide TPMS Service GuideService kits, torque and relearnOpen the guide

Finders7

Tire Size DecoderRead every part of a tire sizeOpen the finder Valve Stem FinderTPMS, rim hole, thickness and pressureOpen the finder Air Coupler IdentifierTell M, A, T, V and L styles apartOpen the finder Wheel Weight FinderClip style by vehicle and wheelOpen the finder Lug Nut FinderThread, seat and hexOpen the finder Inner Tube FinderTubes and flaps by tire sizeOpen the finder Tire Stud Size FinderTSMI size from the hole depthOpen the finder

Calculators2

Tractor Tire Ballast CalculatorGallons, flake, water and added weightOpen the calculator Balancing Bead and Sealant CalculatorOunces per tire and sealant pail mathOpen the calculator

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