5 inch go-kart wheels are the standard rim size for sprint racing karts. Almost every competition kart tire, slick or wet, is built to fit a 5-inch bead seat, so if you race on pavement this is the wheel you will run. Fronts are narrow and rears are much wider, the wheels are usually aluminum or magnesium, and they are designed to hold a tire bead at the low pressures kart tires use. They are a different product from the 6-, 8-, and 10-inch wheels on yard and off-road karts, with different widths, mounting, and tires. This guide covers why racing settled on 5 inches, front and rear widths, materials, bead retention, fitment, typical costs, and how to mount tires.
Part of our Go-Kart Parts guide — explore the full guide →
Why Racing Karts Use 5 Inch Go-Kart Wheels
Sprint karts have no suspension, so the tire sidewall does much of the job a spring would. A small-diameter rim with a short, wide tire keeps the kart low, keeps rotating mass down so the engine can accelerate it quickly, and gives a stiff, predictable contact patch on smooth pavement.
Standardization keeps the size in place. Because sprint classes worldwide run 5-inch rims, tire makers concentrate their development on that diameter, and chassis builders design around it. Class rules usually name the approved tire, and that tire fixes the rim diameter and narrows the rim widths that make sense.
The 5-inch wheel is a paved-track wheel. The short sidewall and low ground clearance are a poor match for grass, dirt, or rough ground. Our guide to racing go-kart tires covers the compounds and constructions designed for these rims.
Front vs Rear Widths
Racing karts run very different widths front and rear. Front rims are narrow, often around 130 mm wide, to carry a narrow front tire that keeps steering light. Rear rims are much wider, often somewhere around 180 to 212 mm, to carry the wide rear tires that do most of the work through a solid rear axle.
Kart racing tires are labeled with a code such as 4.50/10.0-5 for a front or 7.10/11.0-5 for a rear. The last number is the rim diameter in inches, which is where the “5 inch” name comes from. The first two numbers describe the tire width and overall diameter. Your tire maker will list the rim widths each tire is designed for.
Within the approved range, rim width is a tuning tool. A wider rim generally stretches the tire and makes it respond more sharply, while a narrower rim lets the sidewall flex more. How much difference you feel depends on the tire and chassis, and some classes restrict rim width, so check your class rules. If the tire codes are new to you, our go-kart tire sizes guide explains both racing and recreational sizing systems.
Best Go Kart Wheels: our top 3 picks
| Product | Best for | Key features | Price | Buy |
|---|---|---|---|---|
| WPHMOTO 5-Inch Slick Set | Best complete 5-inch set |
| $448.59as of Oct 27, 2026 6:45 am EDT | Buy now →Check current price |
| ZARKO 4.10-6 Assemblies | Best 6-inch rear assemblies |
| $83.77as of Oct 27, 2026 6:45 am EDT | Buy now →Check current price |
| CWTD 145/70-6 Front Kit | Best 6-inch front-end kit |
| $165.77as of Oct 27, 2026 6:45 am EDT | Buy now →Check current price |
Prices are Amazon’s listed prices as of the date and time shown and are subject to change; the price on Amazon at the time of purchase applies. As an Amazon Associate we earn from qualifying purchases.
Materials: Aluminum vs Magnesium
Racing rims come in two main materials.
Aluminum rims are the common, affordable choice. They are durable, widely available, and suitable for practice, club racing, and most new racers.
Magnesium rims are lighter and usually more expensive. Many racers also report that magnesium changes how quickly tires come up to temperature and how they hold it, and some teams choose between aluminum and magnesium depending on track conditions. The effect depends on tire, track, and weather, so treat it as a fine-tuning choice rather than a guaranteed gain. Magnesium corrodes if it is left wet or dirty, so it needs cleaning and dry storage.
Rims are also made in different constructions. Most racing rims are one-piece castings or machined parts; some designs use bolted halves. Check that any rim you buy is legal for your class, since some series restrict wheel materials or require specific wheel types. If you want more detail on the aluminum side, our guide to aluminum kart wheels goes further.
5-Inch Rim Options Compared
| Rim type | Typical width | Character | Best for | Typical price per rim |
|---|---|---|---|---|
| Aluminum front | About 130 mm | Durable, affordable | Practice, club racing | $40–$100 |
| Aluminum rear | About 180–212 mm | Durable, affordable | Practice, club racing | $50–$120 |
| Magnesium front | About 130 mm | Lighter, different heat behavior | Competition | $90–$200 |
| Magnesium rear | About 180–212 mm | Lighter, different heat behavior | Competition | $110–$250 |
Prices are typical ranges for new rims and vary by brand and width. Used rims are common but need careful inspection.
Bead Retention at Low Pressure
Kart racing tires run at low pressures compared with road vehicles, often somewhere in the high single digits to mid-teens psi, depending on the tire, track temperature, and grip. Always use the tire maker’s guidance as your starting point. At those pressures, hard cornering loads try to roll the bead off the rim, and a tire that unseats mid-corner usually means a spin.
Racing rims deal with this in two ways. A raised safety hump behind the bead seat helps hold the bead in place. Many rims also have threaded holes for small bead-retention screws that lock the bead against the rim. The number and position of the screws vary by rim design, so follow the rim maker’s instructions.
When buying used rims, check the bead seats for gouges from careless tire changes, check that any bead-screw threads are clean and intact, and look for cracks or bends. A damaged bead seat leaks air, and a bent rim causes vibration that no setup change will fix.
Fitment: Hubs, Bearings, and Bolt Patterns
Front 5-inch racing wheels usually carry their own bearings and spin directly on the stub axle, so the bearing size must match your spindle; 17 mm and 25 mm are common. Rear wheels bolt to keyed hubs clamped to the rear axle, and the bolt pattern must match those hubs.
Bolt patterns and bearing sizes are common across many brands but not universal. Before you buy, measure the bearing bore and stub axle on the front and count and measure the bolt pattern on your rear hubs. Our go-kart wheel hub guide explains how to measure both, and our go-kart parts guide shows how wheels, hubs, and axles fit together.
A 5-inch racing wheel rarely fits a yard kart without new hubs and spindles, and even then the tires are wrong for unpaved ground. For recreational karts, larger wheels with more sidewall are the better choice; see our general go-kart wheels guide for those sizes.
Cost and Considerations
A full set of four aluminum rims typically costs roughly $180 to $450 new, and a magnesium set often runs roughly $400 to $900. Prices vary with brand and width.
Budget for the extras. You will need valve stems, bead screws if your rims use them, and tire-mounting lubricant. Because racers change tires often, many buy a bead breaker and tire spoons or a tire-changing stand. A spare set of rims mounted with wet tires is a common next purchase for anyone racing in variable weather.
If you are new to racing, start with aluminum rims in the widths your chassis maker recommends for your class tire. Upgrade to magnesium or experiment with widths once you have consistent lap times to compare against.
How to Mount Tires on 5 Inch Go-Kart Wheels
Kart tires can be mounted by hand once you learn the technique.
1. Break the beads. On used tires, use a bead breaker to push both beads into the center of the rim.
2. Lubricate. Apply tire-mounting lubricant to both beads and the rim edges. Do not use petroleum products, which can damage rubber.
3. Fit the first bead. Push it over the rim edge and into the center channel. Work around the rim gradually instead of forcing one spot.
4. Fit the second bead. Do the same, keeping the already-fitted section down in the center channel to give yourself room. Patience matters; a torn bead ruins a tire.
5. Seat the beads. Inflate in short bursts until both beads pop onto their seats. Never exceed the maximum seating pressure printed on the tire, and keep your face and hands away from the tire while inflating.
6. Finish. Fit bead screws if used, set your running pressure, and check for leaks with soapy water. Recheck pressures after the first session, since new tires and rims settle.
Our step-by-step guide on how to change go-kart tires covers tools and troubleshooting in more depth.
Pros and Cons of 5-Inch Racing Wheels
As a platform, the 5-inch racing wheel has a clear profile.
Pros
- The standard size for sprint racing with the widest choice of competition tires
- Low center of gravity and low rotating mass
- Bead retention features hold tires at low pressure
- Widely available new and used
Cons
- Poor choice for grass, dirt, or rough ground
- Magnesium rims cost more and need careful storage
- Hand-mounting tires takes practice
- Bolt patterns and bearing sizes still need checking between brands
Frequently Asked Questions
Why do racing go-karts use 5 inch wheels?
Are front and rear kart rims the same width?
Is magnesium worth the extra money over aluminum?
What pressure do 5 inch kart tires run?
What are the small screws around a kart rim for?
Can I put 5 inch racing wheels on a yard kart?
Final Thoughts
For sprint racing, 5 inch go-kart wheels are the standard the sport is built around. Choose rims in the widths your class tire is designed for, confirm the bearing size and bolt pattern before buying, inspect used rims carefully, and learn to mount tires without damaging beads. Start with aluminum, and consider magnesium once you have the experience to measure the difference.