25mm vs 30mm Wheel Spacers on a Toyota 4Runner

BONOSS Wheel Spacers Grace

25mm vs 30mm wheel spacers on a Toyota 4Runner—which thickness gives you the fitment you're looking for? We installed both sizes on a 2021 Toyota 4Runner and compared the results from the same camera position.  In this video, you'll see the real difference between 25mm and 30mm wheel spacers, how to estimate your wheel fitment with a straight steel ruler, and why the right spacer thickness depends on more than just the gap between your tire and fender.  ⏱What You'll Learn 00:00 25mm vs 30mm? 00:12 Why run wheel spacers on a 4Runner? 00:37 How to estimate fitment with a steel ruler 01:24 25mm vs 30mm: What's the difference? 01:52 Fitment specs and what to check before buying  📄2021 Toyota 4Runner Setup - Wheel spacers featured: 30mm front and rear - Bolt pattern: 6x139.7 - Center bore: 106.1mm - Thread specification: M12x1.5 - Material: Forged 6061-T6 aluminum - Measured tire-to-fender gap in the featured setup: 25mm front / 10mm rear  These measurements describe this specific truck and wheel setup. Your ideal spacer thickness may differ depending on wheel offset, tire dimensions, hub geometry, and the amount of clearance available.  How to Estimate the Right Wheel Spacer Size? Use a straight edge or steel ruler as a reference to compare the tire's outermost sidewall with the fender. Measure consistently at the same position and check both front and rear.  This is an initial fitment estimate, not a universal formula. Confirm the wheel offset, tire clearance, hub fitment, and applicable vehicle and spacer specifications before choosing a thickness. A more aggressive stance should never come at the expense of proper clearance or correct hardware engagement.  🔜🛒Product details and vehicle fitment: https://www.bonoss.com/product/bonoss-forged-active-cooling-wheel-spacers-hubcentric-pcd6x139-76x5-5-cb106-al6061-t6-for-toyota-4runner-1996  Installing Wheel Spacers? Correct installation matters just as much as thickness. Verify the specified torque for each hardware connection, follow the spacer manufacturer's instructions, and complete any required re-torque procedure. 🎬Watch our full installation tutorial: https://youtu.be/WlWSda6CZqs  Which Would You Choose? Would you run 25mm or 30mm on your 4Runner? Tell us your model year, wheel setup, and the stance you're going for in the comments.

Transcript

00:0025, or 30 millimeters. We installed both on this 2021 Forerunner. Here's exactly how to measure

00:06your truck and which size actually worked, with real numbers, not guesses. Let's get into it.

00:12This is our 2021 Forerunner. Black, running aftermarket wheels with a zero offset,

00:18plus all-terrain tires. Look at the wheels, they sit tucked inside the fenders. The stance just

00:24looks off. And the offset means the tires sit closer to the suspension than we'd like.

00:29Well, spacers fix both. They push the wheel out, flush with the fender, and restore proper clearance.

00:35The question is, how thick? Here's the simple way to figure it out. Take a straight steel ruler,

00:41lay it flat against the fender edge, and measure the gap from the outer edge of your tire to the

00:45fender. On our front wheel, that gap is exactly 25 millimeters. On the rear, 10 millimeters. So in

00:53theory, a 25 up front and a 10 in the rear gives you a perfectly flush fit. But the owner

00:59wants to

00:59want the aggressive stance. So this Toyota Forerunner installed 30 millimeters on the front

01:04and rear. The thickness isn't the only number that matters. Your hub bore, the hub lip height,

01:09and the bolt pattern decide whether the spacer seats correctly at all. This Forerunner runs a 6x139.7

01:17bolt pattern with a 106.1 millimeter center bore. So we're using hub-centric spacers that match exactly.

01:23So we tested both. Same truck, same wheel, same camera position. First up, 25 millimeters. See how

01:31it sits. Better than stock, but the owner felt it still wasn't enough. Now, 30 millimeters. Look at

01:38that. It looks incredibly imposing and commanding. Side by side. The difference is 5 millimeters,

01:44about a fifth of an inch. But visually, it's the difference between better and done.

01:49We went with 30 on all four corners. Quick spec recap. 30 millimeter Bonas forged active cooling

01:56spacers. 6061-T6 aluminum. 6x139.7. 106.1 center bore. M12x1.5 studs. And here's the final look.

02:08Same truck, same wheels, just 30 millimeters wider on each side. So, what size are you running on your

02:15Forerunner? 25, 30, or something else? Drop your setup in the comments. We read every single one.

02:22If this helped, a like tells YouTube to show it to more Forerunner owners.

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