A stock Jeep JK can easily accommodate 33-inch tires, ensuring a perfect fit for off-roading enthusiasts. Before running out and fitting bigger tires to your JK, make sure you understand all the implications and that other factors come into play such as backspacing, clearance, fuel economy, handling, and more.
This article will discuss what you can expect when fitting 33-inch tires to a stock Jeep Wrangler JK.
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Fitting 33-inch Tires on a Stock Jeep JK: NO LIFT
The stock Jeep JK comes equipped with the perfect fit for 33-inch tires, making it an ideal choice for off-road enthusiasts seeking the added ground clearance and enhanced performance offered by the Jeep Wrangler 33-inch tires.
- When it comes to upgrading the tires on a stock Jeep JK, fitting 33-inch tires is a perfect fit.
- These larger tires not only add to the overall aesthetics of the vehicle but also enhance its off-road capabilities.
- With the right set of Jeep 33-inch tires, the Jeep JK will have improved traction, better clearance, and increased ground contact.
- Whether it’s conquering rocky terrains or tackling muddy trails, these tires are designed to provide optimal performance.
- If you’re looking to take your Jeep JK to the next level, fitting 33-inch tires is a great choice.
Will 33-inch Tires Scrub Off-Road on a Stock JK?
When it comes to heavy off-road trails, which many Jeep owners are well known for, you will require maximum suspension articulation and enough clearance inside the wheel area. In this instance, the stock suspension will not work the best.
- You will be wise to upgrade your suspension first to accommodate the bigger wheels and allow for maximum flex through and over obstacles.
- We recommend a minimum 2-3″ suspension lift to allow for better clearance and “flex” without scrubbing.
Being an SFA (Solid Front Axle) vehicle, there are no issues with upper control arms and CV angles to worry about. Many JK owners have successfully fitted 33-inch tires on a stock JK. The amount of scrub depends largely on the intended application. Disconnecting front swaybars most definitely results in a body scrub with a stock suspension setup while off-road.
- So, if you want to fit a larger but not wider tire on the stock suspension and still have no issues off-road and achieve full flex without scrubbing you are pretty much limited to 255/80/17.
- This is the same width as the stock JK tire but with a higher sidewall.
- This will improve your ground clearance, lift the diff higher off the ground, and offer improved clearance on other lower-hanging steering components.
The bottom line here is if you fit tires much wider than the 11” tire on stock wheels, chances of making contact with your rear sway bar end link are high. It is advised to fit small wheel spacers to rectify this issue.
How Does 33-inch Tires Affect Fuel Consumption?
Big tire upgrades will affect the gas mileage, and of course, have a direct impact on your wallet too. The bigger heavier tires fall part of the unsprung weight of the vehicle. This is the quickest way to increase fuel consumption.
- Unsprung mass/weight refers to the mass/weight of the suspension, wheels, and other components directly connected to them, that sit below the suspension, rather than being supported by it.
- You can expect to lose at least 1 mpg at a minimum with 33-inch tires.
- The heavier taller than stock tires are wider with more tire surface hitting the road surface, resulting in more drag and rolling resistance.
- The tread pattern also plays a major role since a more aggressive MT (Mud Terrain) tire choice will be louder and result in higher rolling road resistance which means less MPG.
- Start adding heavier aftermarket bumpers, winches, and other accessories and the side-effects soon become more and more obvious.
Will 33-inch Tires Affect the JK’s Handling?
With the bigger 33-inch tires, you’ll also feel a difference in the steering feel. It will feel more stable and cornering will feel slightly better, however, you can expect to feel heavier steering. The bigger heavier tires also cause a more understeer and vague steering feel.
Increased unsprung weight will result in decreased handling while reducing unsprung weight is the key to improving handling. The lower the un-sprung weight, the less work the shocks and springs have to do to keep the tires in contact with the road over bumpy surfaces.
Things to consider before fitting 33-inch jeep tires:
- You will notice that the braking is not as crisp as it was with the stock tires.
- Pulling away from a standstill will feel slightly slower.
- Fuel consumption will increase slightly (Less MPG)
- More weight means higher inertia.
- Higher inertia results in decreased stopping ability with the stock JK brakes.
- If you know your vehicle well and drive it daily, you will notice the differences.
Many JK owners have opted to upgrade their stock Jeep JK by fitting 33-inch tires on 17-inch rims, making his Jeep Wrangler look even more rugged and ready for off-roading adventures.
Wear on Other Components With Oversized Tires
Components that will be affected by fitting 33 tires for Jeep Wrangler are:
- Braking Distance
- Odometer accuracy
- Fuel Consumption (MPG)
- Steering components
- Gearing Ratios
- Torque on the wheels
The bigger you go the more obvious these side effects become. With 33″ tires on a JK, you won’t feel most of the above-mentioned effects since the vehicle can handle the 33-inch tires comfortably.
However, once you opt for 35″, 37″, and bigger, your vehicle will not perform optimally without additional upgrades on your suspension, steering, and drive-train components to make the whole setup work 100%.
33 inch tires Jeep Wrangler – Backspacing
Having the correct backspacing is crucial when fitting 33″ tires and is often a factor that most don’t speak about. But first, let’s understand backspacing.
- The backspacing on stock JK wheels is 6.25″.
- That means that the mounting surface of the wheel is 6.25” from the rear lip of the wheel.
- This is just enough to accommodate the 33″ however your clearance on the front bumper might be very minimal, depending on the tire tread pattern, thickness, and mold design.
- All tires are not created equally and tire manufacturers use different molds, so clearance will vary greatly based on make and tread pattern here.
Backspacing is the distance from the hub mounting surface (usually in the center of the rim) to the inside lip of the wheel (measured in inches). Positive backspacing puts the tire closer to the hub of the truck.
- A Rim with more negative backspacing pushes the wheel outward.
- Hence a rim with a closer to 0 or negative offset will sit further out and allow you to fit wider tires.
- There will be a few inches of tire poking out.
- Always make sure you check your state laws regarding maximum tire “poke”.
- Certain countries are very strict regarding this law.
Fitting 33-inch tires is something that can be successfully done on the JK Wrangler without any hassles. This will depend on your intended application. Fit aftermarket rims with a more negative offset to be safe. If you intend to venture offroad, doing rough tracks and rock crawling, you’ll have to do a suspension upgrade first to take advantage of the Jeep’s legendary articulation ability.
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