00:00Choosing wheel spacers for your Jeep Wrangler isn't just about picking the thickest spacer
00:04that looks aggressive. On this 2021 Wrangler JL, we initially considered 30mm in the front
00:11and 35mm in the rear. But after comparing the fitment, the wheels stuck out farther than the
00:16owner wanted. So we went with 25mm all around. Here's how to choose the right size for your
00:22own Wrangler before you buy. First, decide what you're trying to achieve. Do you want the wheels
00:27to sit closer to the edge of the fenders? Are you trying to get a wider-looking stance
00:31with your current wheels? Or do you simply want to understand how much farther your wheels
00:35will sit out? These are different goals, and they don't automatically lead to the same spacer
00:40size. Start with your current setup. Your wheel width will offset tire size and how the wheels
00:46sit relative to the fenders. A spacer changes the wheel's position, but it doesn't change
00:51the tire's actual width or diameter. Next, measure where your wheels sit right now.
00:56Park on level ground. With the vehicle safely secured, look at the wheel from directly above
01:02or use a straight edge to help compare the tire's outer sidewall with the fender. Measure the
01:07gap between the tire's outermost sidewall and your chosen fender reference point. Be consistent.
01:13Use the same reference point on both sides, and check the front and rear separately. This
01:18gives you a baseline before you choose a spacer. Here's the basic principle. A wheel spacer
01:23moves the wheel outward by approximately the spacer's thickness. For example, a 25-millimeter
01:29spacer moves the wheel mounting position outward by about 25 millimeters. A 30-millimeter
01:35spacer moves at about 30 millimeters. That 5-millimeter difference may sound small, but it can be noticeable
01:41when you're looking at the tire relative to the fender. For a first estimate, compare your current
01:46position with where you want the tire to sit. But don't assume the measured gap translates perfectly
01:51into your final spacer size. Wheel offset, tire shape, suspension geometry, and your measurement
01:58reference all matter. Use the measurement to narrow down your options, then verify the fitment on the
02:03vehicle. Now let's apply that to this Wrangler. We compared 30 millimeters in the front and 35 millimeters
02:10in the rear with the final 25-millimeter setup. The wider setup created a more pronounced stance,
02:16but the wheels extended farther outward than the owner preferred. With 25 millimeters at all four
02:22corners, the result was closer to the look the owner wanted. That doesn't mean 25 millimeters is the
02:28right size for every Jeep Wrangler. Another Wrangler with different wheels, tires, offset, or fender
02:34coverage could need a different setup. The important thing is to compare the actual result against your
02:40goal, not just copy someone else's spacer size. Before choosing a spacer, there's one more step.
02:46Confirm that the parts physically fit together. For this 2021 Wrangler, the fitment we checked uses a
02:535x127 bolt pattern, a 71.5-millimeter center bore, an M14x1.5 hardware. We also measured the factory stud
03:02projection, approximately 41 millimeters at the front and 42 millimeters at the rear. The wheel pockets
03:09measured about 18.5 millimeters deep. These measurements matter because the factory studs
03:14must not interfere with the wheel or prevent it from sitting completely flat against the spacer.
03:19Let's do the math. With a 25-millimeter spacer, on the front, 41-25 leaves about 16 millimeters of studs
03:28sticking out past the spacer. On the rear, 42-25 leaves about 17 millimeters. Both numbers,
03:3516 and 17 millimeters, sit well under the 18.5-millimeter recess in the wheel. That means
03:42the wheel drops down and seats completely flat against the spacer, giving us 100% metal-to-metal
03:49contact between the wheel and the flange. No cutting, no grinding, and absolutely no permanent
03:55modification to the vehicle. And if you ever decide to pull the spacers off, the Jeep goes right back to
04:01completely stock, not a single trace left behind. For this particular 2021 Jeep Wrangler JL,
04:07the final choice was 25-millimeter Bonas forged active cooling wheel spacers made from 6061T6 aluminum
04:16alloy. The decision came down to the owner's preferred appearance, the real-world comparison,
04:21and checking the fitment details, not simply choosing the thickest option. The takeaway is simple.
04:27Measure your current setup, estimate the movement you want, compare realistic options,
04:32and confirm the complete fitment before installation. What would you choose for your
04:36Wrangler, 25 millimeters all-around, or a wider setup? Let us know your Wrangler year,
04:42wheel, and tire setup, and the space or size you're considering in the comments.
04:46And if you're planning your own Jeep build, subscribe for more real-world fitment comparisons
04:51and installation guides.
