Wheel and Tire Fitment FAQ for Incision 1.9 Wheels

Quick answer

Most 1.9 tires fit Incision 1.9 wheels because the beadlock rings clamp the tire bead rather than relying on a glue seam. The parts that actually decide fitment are the wheel's hub pattern, the beadlock ring style, and whether you are using SLW hubs or an IFR-compatible ring. Check those three things before you buy, and you will avoid almost every fitment problem.

Fitment questions come up constantly on 1.9 crawler builds, and most of them trace back to one of three parts: the wheel, the hub, or the ring. This FAQ answers the specific questions we hear about Incision 1.9 wheels, including KMC KM720 fitment and Roswell wheel fitment, without the guesswork.

Each answer below stands on its own, so you can jump to the question that matches your build. Where a specification is not published, we say so rather than guess.

Will any 1.9 tire fit an Incision 1.9 wheel?

In most cases, yes, as long as the tire is a true 1.9 beadlock-style tire with a bead that can be clamped. Incision 1.9 wheels hold the tire by pinching the bead between the wheel face and the ring, so the tire does not need to match a glue channel or a specific sidewall shape. That is the main reason these wheels work across so many tire brands.

The exception is a tire with a very thick or unusually shaped bead that will not seat evenly under the ring. If the bead will not sit flat, do not force it. A bead that is pinched unevenly can leak or slip under torque.

• Test-fit the tire bead by hand before you install screws.
• If the bead will not seat flat, the tire is the problem, not the wheel.

What is the difference between SLW hubs and IFR rings?

SLW hubs are the hex-shaped adapters that mount the wheel to the axle. They set your track width and are sold separately on many Vanquish wheels, so the hub you choose changes how the wheel sits on the truck. IFR refers to the beadlock ring design that is compatible with the IFR system, which affects how the ring mounts and how the wheel assembles.

These are two different jobs. The hub decides offset and axle fitment. The ring decides how the tire is clamped and what the wheel looks like from the side. Mixing them up is the most common cause of a wheel that will not fit a build.

• Choose the hub for offset and axle fitment.
• Choose the ring for clamping style and appearance.

Do I need a center hub in addition to an SLW hub?

On wheels that use a separate center hub, yes. The center hub rests between the wheel and the SLW hub and is attached with the included screws. It is not the same part as the SLW hub, and it is not optional on wheels designed for it. The Center Hubs XD Series adds .100 offset and works with all Vanquish Products 1.9 and 2.2 wheels designed for use with an SLW hub.

One caveat from the catalog: some discontinued Vanquish wheels had a center cap milled into the wheel face. Those wheels do not use a separate center hub. If your wheel face already has a cap, adding a center hub is not the right move.

• Check whether your wheel face has a milled-in center cap before ordering hubs.
• The Center Hubs XD Series adds .100 offset, which changes track width.

How do I know if a beadlock ring will fit my wheel?

Match the ring to the wheel's mounting pattern and bolt-on design, not to the tire. The Battle Born Wheels 2.2 Notched Beadlock ring is compatible with all Vanquish Products 2.2 beadlock wheels that use a bolt-on ring, and it is IFR compatible. That is a clear, checkable compatibility statement: bolt-on ring, 2.2 size, IFR compatible.

For 1.9 wheels, the same logic applies. If your wheel uses a bolt-on ring, a bolt-on ring of the correct size and pattern will fit. If your wheel uses a different retention method, a bolt-on ring is not the answer.

• Confirm the wheel size (1.9 or 2.2) before ordering a ring.
• Confirm bolt-on versus other retention before ordering a ring.

What should I check on KMC KM720 and Roswell wheel fitment?

For KMC KM720 fitment and Roswell wheel fitment, the checklist is the same as any other Incision 1.9 wheel: confirm the wheel is designed for SLW hubs if you plan to use them, confirm the ring style matches the wheel, and confirm the tire bead clamps evenly. The catalog does not list a separate hub requirement for these specific wheels, so treat the standard 1.9 SLW hub and ring rules as your starting point.

If you are swapping rings or hubs between wheels, do it one wheel at a time and check the bead seat before you tighten everything down. It is much easier to catch a mismatch on the bench than on the trail.

• Start with the standard 1.9 SLW hub and ring rules.
• Change one variable at a time when swapping parts between wheels.

Can I run 2.2 rings or hubs on a 1.9 wheel?

No. The 1.9 and 2.2 designations refer to the wheel diameter, and rings and hubs are sized to match. A 2.2 ring will not clamp a 1.9 tire bead correctly, and a 1.9 ring will not seat on a 2.2 wheel. Keep the sizes matched.

The same applies to beadlock rings sold as 2.2 parts, such as the Battle Born Wheels 2.2 Notched Beadlock. It is built for 2.2 beadlock wheels with a bolt-on ring, so it belongs on a 2.2 wheel, not a 1.9.

• Never mix 1.9 and 2.2 rings or hubs.
• Size match is the first check, pattern match is the second.

What about tire width and foam fitment?

Tire width matters less than bead shape on a beadlock wheel, because the ring clamps the bead rather than the sidewall. What does matter is the foam. A foam that is too wide or too firm for the tire can push the bead out of the ring seat, which shows up as a wobbly wheel or a bead that will not stay put.

If you are changing tire size, recheck the foam at the same time. A foam that worked with a narrower tire may not work with a wider one.

• Recheck foam when you change tire size.
• A bead that will not stay seated often points to the foam, not the wheel.

Fitment checkpoints before you buy

Wheel size

Confirm 1.9 or 2.2 before anything else. Rings and hubs are sized to match and do not interchange. Size mismatch is the fastest way to waste a purchase.

Hub requirement

Check whether the wheel is designed for SLW hubs, and whether it also needs a separate center hub. The Center Hubs XD Series adds .100 offset and sits between the wheel and the SLW hub. Hub choice sets your track width, so decide it before you mount tires.

Ring style

Match the ring to the wheel's retention method. Bolt-on rings fit bolt-on wheels; IFR-compatible rings are called out in the catalog. If the catalog does not state compatibility, ask before ordering.

Tire bead and foam

Test-fit the bead by hand and recheck foam when changing tire size. A bead that will not seat flat is a warning sign. Fix the bead seat on the bench, not on the trail.

Parts referenced in this FAQ

• Center Hubs XD Series: Works with all Vanquish Products 1.9 and 2.2 wheels designed for use with an SLW hub, rests between the wheel and the SLW hub, and adds .100 offset. If your wheel is designed for an SLW hub, this hub changes track width by .100 and must be installed between the wheel and hub, not in place of the SLW hub.
• Battle Born Wheels 2.2 Notched Beadlock: Compatible with all Vanquish Products 2.2 beadlock wheels that use a bolt-on ring, and is IFR compatible. A clear compatibility rule: bolt-on ring, 2.2 size, IFR compatible. It is not a 1.9 part, so it does not belong on a 1.9 wheel.
• Method 1.9 Race Wheel 310 V2: A 1.9 aluminum beadlock wheel that requires SLW hubs and includes IFR-compatible beadlock rings and 0.8 inch molded clamp rings. A concrete example of a 1.9 wheel that needs SLW hubs, which is exactly the hub question most fitment issues come down to.

Fitment on Incision 1.9 wheels comes down to size, hub, and ring. Get those three right and almost any 1.9 beadlock tire will mount cleanly. When a spec is not published, treat that as a reason to check rather than assume.