Tire and wheel fitment
Hookless Rim Tire Compatibility: Checking Giant, Zipp and Other Wheels
How to read tire sidewall and rim markings to check hookless compatibility on Giant, Zipp and other wheels, covering ETRTO size, internal rim width, tire width limits and the 5 bar (72.5 psi) pressure cap.
Square Tire Setups on ATVs: Sizing, Sidewall Markings and Fitment
How to read ATV tire size markings, compare diameter, width and rim size with simple math, and judge whether same-size tires front and rear will fit your ATV.
Motorcycle Mousse Sizing and Tire Compatibility: Start With the Sidewall Numbers
How to read motorcycle tire size markings, what width, aspect ratio and rim diameter mean for mousse insert size, how to calculate sidewall height and diameter, and where calculated geometry stops.
Wheel Bolt Thread Sizes: Diameter, Pitch and Vehicle Fitment
How to read wheel bolt thread sizes such as M12x1.5 and M14x1.5, typical sizes for BMW, E46, VW, Audi, Mercedes and Porsche, and how tire and wheel markings relate to bolt fitment.
Inner Tube Size Charts and Conversions: How to Find the Right Bicycle Tube
How to read tire sidewall numbers, convert ETRTO, inch and 700C sizes, pick a tube width range, valve type and valve length, and calculate tire diameter.
Bicycle Tire and Rim Width Compatibility Chart: From Sidewall Numbers to Safe Fit
How to read bicycle tire sidewall sizes, match tire width to internal rim width, find the maximum tire width for a 17 mm rim, and work out diameter and circumference changes.
Spare Tire Well Dimensions: Measuring for Storage Fit
How to measure a spare tire well, including on a Foxbody Mustang, and read sidewall numbers to calculate tire diameter, sidewall height and width. Covers well depth, usable width and hold-down clearance.
Tire Fitment Guide: Checking Replacement Sizes for Your Vehicle
Learn to read tire sidewall numbers and calculate sidewall height, diameter and circumference to compare replacement sizes for cars, trucks and lifted trucks.
How to Find the Right Tire Load-Inflation Table Using Your Sidewall Markings
Use the numbers on your tire sidewall to pick the correct load-inflation table, read load capacity at a given pressure, and see how size changes affect diameter.
Tire Size Changes and Vehicle Inspection: From Sidewall Numbers to Approved Sizes
How to read tire sidewall markings, calculate sidewall height, diameter and circumference, compare replacement tire sizes, and understand when a size change affects vehicle inspection and approval.