Yes, and the bigger the tire, the bigger the error. Here's the math on how taller tires throw off your speedometer and odometer, plus how to recalibrate.
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On dry pavement, a smooth tire actually grips better. So why does every street tire have grooves? Here's what tread really does, straight from the shop.
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Three alignment angles, three different jobs. Here's exactly what camber, caster, and toe each control, how they're measured, and which one quietly destroys your tires.
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Tires start out a milky off-white. Carbon black is what turns them black, and it does far more than set the color. Here's the real reason, from the shop.
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You've heard one pound of unsprung weight equals ten of sprung. Is that true? Here's what unsprung weight really is, why it matters, and where the folklore falls apart.
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That original door sticker was written for bias-ply tires, and it's wrong for the radials on your classic today. Here's the PSI to actually run.
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Feathered tread isn't random. It's your alignment leaving evidence. Here's how to read the angle, find the cause, and stop it before the tire's gone.
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That high-pitched screech when you turn or brake isn't always a problem. Here's how to tell a harmless squeal from one that's costing you tires.
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All-terrain vs. all-season tires compared on tread, noise, fuel economy, snow rating, and cost. Dennis breaks down the data to help you choose.
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Can you drive drag slicks on the street? Hank explains why slicks aren't street legal or safe, and the DOT-legal drag radials to run instead.
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How big of a tire can you fit without a lift? Dennis breaks down diameter, width, and offset limits, plus realistic max sizes by platform.
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Drag slicks vs. drag radials: which hooks harder, which is street legal, and which is faster? Hank breaks down the real-world tradeoffs.
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From low-volume molds to NOS scarcity, Dennis breaks down the five real reasons vintage motorcycle tires carry the prices they do.
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Hank breaks down when bundling rims and rubber into one financed package beats financing tires alone, and when it doesn't pay.
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The honest answer isn't a logo. Dennis breaks down the spec-sheet red flags that separate a tire to avoid from a legit value brand.
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Hank busts the tire maintenance myths that drain your wallet without protecting your tires, then tells you what actually keeps rubber on the road.
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A fitment specialist explains which tire wears out fastest and why, broken down by drivetrain, with the physics, the EV factor, and how to fix it.
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A shop owner answers whether you can swap a 235 tire for a 225, with the diameter math, speedometer effect, load rating check, and when not to.
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A fitment specialist breaks down the luxury rim brands worth the premium, from Forgiato and HRE to Asanti, Beyern, and Mandrus, plus what to check.
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A shop owner ranks the most popular forged wheel brands worth your money, from ADV.1 and HRE to American Racing, plus how to pick the right one.
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The 245 on your sidewall is section width, not the rubber meeting the road. Here's how section width and tread width differ—and which one actually matters.
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Muscle cars left the factory on bias-ply redlines, Wide Ovals, and Polyglas GTs. Here's what came stock by brand—and how to get it period-correct today.
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Wheel width sets which tire sizes you can safely run. Here's the min/ideal/max fitment chart and the math to match tire to wheel before you buy.
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Redline tires defined the muscle car era—here's what they are, why factories used them, and how to choose the right set for your build.
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P-metric or LT? Dennis Feldman explains how the two designations differ in construction, load capacity, and ride feel — plus the towing threshold and use-case math that decides which one your truck actually needs.
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