More stance.
Do the math first.

Spacers or a wheel set?

A wheel spacer is a machined disc, typically 1 to 1.75 inches thick, that bolts to the hub face in place of the wheel. The wheel then bolts to the spacer's outboard studs. The result: your existing wheel moves outward by however thick the spacer is, widening the stance without changing anything else about the wheel or tire.

A wheel swap replaces the factory wheel with an aftermarket unit at a different offset and backspacing. The offset determines how far the wheel face sits relative to the mounting flange. A negative offset pushes the face outward; a more positive offset tucks it inward. Swapping to a wheel with more negative offset gets you the same wider stance as a spacer, but as a permanent, integrated part of the wheel itself.

The question is not which looks better. Both can look right on a built Wrangler. The question is what problem you are actually solving, and whether your build is headed toward 35-inch tires or staying on factory-size rubber.

Offset, hub-centric, and stud engagement

Factory Wrangler offsets run roughly +44mm to +51mm depending on the trim and model year. A 1.5-inch spacer (38mm) shifts the effective offset from around +44mm down to roughly +6mm, giving you a significantly more flushed stance without touching the wheel. That is the basic math.

The more important spec is whether the spacer is hub-centric. A hub-centric spacer has a bore machined to match your Jeep's hub diameter (71.5mm on JK, JL, and JT). The hub bore centers the assembly, not the lug pattern. Without a hub-centric fit, the spacer relies entirely on lug tension to stay centered, which can introduce vibration at highway speeds and uneven load on the studs.

Stud engagement is the third thing to get right. When a spacer sits between the hub and wheel, your factory studs now only pass through the spacer's thickness before the wheel seats. A spacer with integrated, outboard studs solves this: the factory studs clamp the spacer, and the spacer's own studs give the wheel full thread engagement. The Spidertrax WHS010K uses this design. A minimum of 1.5x the stud diameter in thread engagement is the widely cited standard. Do not guess at this one.

One fitment note that matters for JK versus JL owners: factory JK Wranglers (2007-2018) use M12x1.5 wheel studs. The JL Wrangler (2018-present) and Gladiator JT use M14x1.5. The Spidertrax WHS010K is built for JK hardware. If you are on a JL or JT, confirm spacer fitment with the manufacturer before ordering.

When spacers are the right call

Spacers make sense when you want more stance without changing tires. If you are running factory 32s or 33s and the wheels are in good shape, bolting on a hub-centric spacer pair is a clean, reversible move. No tire swap, no remounting, no regear conversation.

The budget case is real: a set of Spidertrax 1.5-inch spacers costs much less than a wheel and tire swap. A four-wheel swap to RT105s adds cost before you touch a tire. That gap funds a lift, a set of recovery gear, or a body armor piece. If stance is the only goal, spacers get there for less.

The install is a hand-tools job. The spacer mounts to the hub, you torque it to spec, mount the wheel on the spacer's outboard studs, and torque those. Plan a re-torque check after the first 50 miles and add it to your maintenance rotation after that.

When a full wheel swap wins

If 35-inch tires are anywhere on your list, the math changes. A 35x12.50R17 tire on a stock JK or JL needs proper backspacing to clear the front CV axle and upper control arm at full droop. Factory wheels sit at too much positive offset for that clearance without significant rubbing under articulation. The RockTrix RT105 runs at -12mm offset and 4.5-inch backspacing, which is the geometry purpose-built for 35s on a lifted Wrangler.

JL and JT owners have a second reason to skip the spacer route: the Spidertrax WHS010K is built for JK M12 hardware, not the M14 studs the JL and JT use. A wheel swap sidesteps that fitment issue entirely since both the RT105 and the Method 305 fit JK, JL, and JT at the same 5x127 bolt pattern.

There is also a compounding problem with stacking. Say you run 1.5-inch spacers today and later decide you want another inch of width. Adding a second spacer raises the wheel bearing load arm and puts more leverage on the hub bearing than the assembly was designed for. A wheel at the right offset from the start avoids that progression entirely.

If you want a cleaner look with less protrusion, the Method 305 NV runs at 0mm offset, versus the RT105 at -12mm. Both are legitimate choices; the RT105 gives you more aggressive stance, the Method 305 sits flush and carries a higher per-wheel load rating at 2,500 pounds versus the typical aftermarket aluminum.

Where 35s come in

Once you are buying a new wheel set for the offset, the logical next question is whether to stay on 33s or move to 35s. The short version: if you have or are planning a 2-inch lift, 35s are a realistic move on both the JK and the JL. The JL has more factory clearance than older JK builds, and Rubicon trims start with even more room.

The three tires in the catalog cover the main territory:

• BFGoodrich KO2 is the all-terrain that almost everyone ends up with. E-load carcass, severe-snow rated, 3,195 lb per-tire capacity. It is the known quantity for a doors-off rig that does real trails and still drives to work.
• Nitto Ridge Grappler is the hybrid terrain option. It has more tread void than a standard AT and less than a full mud-terrain, so it carries real trail grip while keeping highway noise lower than a blocky MT. A good call if you are on pavement most of the week.
• Toyo Open Country AT3 C-load is the lighter option. At C-load (2,405 lb per tire) it weighs and rides differently than the E-load alternatives. Less unsprung mass, softer ride. If you do not need the E-load rating and you are already feeling every expansion joint on a doors-off commute, this is worth the look. Confirm the load rating against your Jeep's GVWR and axle capacity before you mount them.

Budget reality for a full tire swap: four KO2s plus the RT105 wheel set cost substantially more than spacers before mounting and balancing. That is a different decision, and the right one if 35s are the goal. Not the right one if they are not.

Fitment checklist before you order

Run through this before you click buy. Fitment problems are expensive to undo once the tires are mounted.

1. Confirm your bolt pattern. All JK, JL, and JT use 5x127 (5x5). Cross-check the wheel or spacer listing against your specific model and year.
2. Confirm your hub bore. JK, JL, and JT share a 71.5mm hub. Buy hub-centric components. Lug-centric spacers on a highway Jeep are not worth the vibration risk.
3. Check your stud hardware. JK Wranglers use M12x1.5 studs. JL Wranglers and JT Gladiators use M14x1.5. Spacer fitment is hardware-specific. The Spidertrax WHS010K is JK only.
4. If running spacers: torque to spec and plan a re-torque at 50 miles. Hub-face torque specs are in the spacer instructions. Write this into your maintenance schedule rather than trusting memory.
5. If buying wheels for 35s: confirm offset and backspacing against your lift height and fender trim. The RT105 at -12mm and 4.5 inches of backspacing is built for a 2-inch-plus lift. Running that offset on a stock-height JK may rub.
6. Check your spare carrier. 35-inch tires are physically larger and heavier than factory rubber. If you run a factory bumper-mounted spare or a tailgate spare, confirm the carrier is rated for a 35 before you swap. Many are not.
7. Verify load ratings. Confirm the per-tire load rating meets or exceeds your Jeep's requirements. This is not optional. Axle and GVWR ratings are in your owner's manual; tire load tables are on the manufacturer's site.