Rookie Breakdown: What You Actually Need to Race in 24 Hours of Lemons

So you've decided to do a 24 Hours of Lemons race. Good. It's one of the best decisions you'll make as a car person. It's also one of the most confusing to prepare for, especially if you've never built a race car or bought racing gear before.

This guide is the one we wish existed when we were starting out. It covers what the car actually needs, what the driver actually needs, and where rookies consistently waste money or show up to tech inspection with something that doesn't pass. Read it before you buy anything.

A Quick Note on Lemons Rules

The 24 Hours of Lemons has its own rulebook, and it gets updated. Always download the current version from the official Lemons website before you build or buy. What's in this guide reflects general requirements and common sense for budget endurance racing, but the rulebook is the final word. Tech inspectors have seen everything. They are not impressed by excuses.

Part 1: Car Requirements

The car is where most rookies either overspend on the wrong things or underspend on the things that actually matter. Here's how to think about it.

Roll Cage

A roll cage is required. Not a roll bar. A cage. It needs to meet Lemons' specifications for tubing diameter, wall thickness, and mounting points. If you're buying a pre-built Lemons car, have someone who knows cages inspect it before you hand over money. A bad cage is worse than no cage in some scenarios.

Key points:

• Main hoop, front hoop, and door bars are the minimum structure
• Tubing must be properly welded — no gaps, no cracks, no rust through the welds
• The cage must not interfere with driver egress — you need to be able to get out fast
• Padding on any tube the driver's helmet can contact is required

Seat

A proper racing seat is required. Your stock seat is not acceptable. You need a fixed-back racing seat that is securely mounted to the chassis — not to the stock seat rails, which are not designed for crash loads.

FIA-rated seats are the gold standard. For Lemons, you can often run SFI-rated seats as well, but check the current rulebook. The seat needs to be mounted so the driver's head is below the main hoop when seated normally.

If you're running a team with multiple drivers, make sure the seat works for all of them or plan for a seat swap. A seat that doesn't fit a driver is a safety problem, not just a comfort problem.

Harness

A multi-point harness is required — typically a 5- or 6-point. The harness must be properly mounted to the cage or chassis, not to the stock seatbelt anchor points.

Important things rookies get wrong:

• Harnesses expire. SFI harnesses have a manufacture date on the tag and expire after a set period. Expired harnesses fail tech. Check the date before you buy used.
• Harness angle matters. Shoulder straps need to run at the correct angle relative to the seat. Too steep and they push you into the seat in a crash instead of holding you.
• A harness without a HANS device is dangerous. More on that below.

Fire Extinguisher or Fire Suppression System

An onboard fire suppression system is required for Lemons racing. Most systems use nozzles directed at both the driver compartment and engine bay.

The system must be securely mounted, fully charged, and installed according to manufacturer guidelines. Many teams use FIA or SFI approved systems for easier tech compliance and peace of mind.

A handheld extinguisher is still commonly carried as backup, but it is not a substitute for a proper onboard suppression system.

Do not cheap out on mounting hardware. A loose bottle becomes dangerous in a crash, and expired or improperly installed systems can fail tech inspection.

Kill Switch

An electrical kill switch is required and must be accessible from both inside and outside the car. The standard location is the driver's side of the windshield or the B-pillar. It needs to cut all electrical power including the ignition.

Use a proper racing kill switch with the international battery symbol. Tech inspectors look for this. A toggle switch from the hardware store is not acceptable.

Tow Straps

Front and rear tow straps are required in Lemons racing. They must be securely mounted to solid recovery points on the chassis and clearly visible to track workers. Bright colors like red, yellow, or orange are commonly used to make them easy to spot.

Rigid tow hooks are out. Lemons changed the rule to flexible straps, and we broke it down in the tow strap rule change post. Check the current rulebook for the exact wording.

Do not rely on flimsy universal straps, sheet metal mounts, or zip tied hardware. Recovery points need to withstand the force of quickly pulling a disabled race car out of a hot track situation.

A properly mounted tow strap is one of those small details that can save a ton of frustration during a race weekend

Tires

Lemons is not a tire war. Reliability and consistency matter more than ultra expensive race rubber.

For a first event, focus on safe, matching tires with proper load and speed ratings for your car. Avoid dry rot, cords, bubbles, cracking, or mismatched tire sizes and compounds. Those issues can create unpredictable handling and quickly get you black flagged or worse.

Most rookie teams do just fine on:

• Performance street tires
• 200 treadwear track day tires
• Good condition takeoffs

A quality 200TW tire is usually the sweet spot for beginner Lemons teams because it balances grip, durability, and cost.

Also pay attention to:

• Wheel condition (no cracks or bends)
• Proper lug torque
• Tire pressures
• Heat cycled or worn out tires losing grip

One common rookie mistake is over-tiring the car. Super sticky tires can add stress to hubs, brakes, wheel bearings, and cooling systems during long endurance races.

Brake Reliability

Fresh brake pads and rotors before every event. Brake fluid flushed with a high-temperature fluid (ATE Type 200 or similar). Brake lines inspected for cracks or swelling. This is not optional and not a place to cut corners.

Brake fade mid-race is a real thing. If your brakes are marginal on the street, they will fail on track. Fix them before you go.

Fluids and Maintenance

Endurance racing is hard on cars. Before your first event:

• Fresh oil and filter
• Coolant system inspected and flushed if needed
• All hoses and clamps checked
• Transmission and differential fluids fresh
• No active leaks — leaking cars get black-flagged and can cause accidents

Bring spare fluids to the event. You will use them.

Common Rookie Car Mistakes

• Spending too much on power. A reliable 100hp car finishes races. A fast but fragile car sits in the paddock. Reliability wins Lemons.
• Ignoring cooling. Overheating is one of the most common DNR causes. Make sure your cooling system is in good shape.
• Skipping the pre-event shakedown. Drive the car before race weekend. Find the problems in your driveway, not on track.
• Underestimating tech inspection. Tech inspectors are thorough. If something isn't right, you fix it in the paddock or you don't race. Build the car to the rulebook, not to what you think you can get away with.

What Matters vs. What Doesn't

Matters: cage integrity, harness mounting, brakes, cooling, no leaks, kill switch, fire extinguisher, tow straps, window net.

Doesn't matter (for your first event): aero, fancy wheels, suspension upgrades, power modifications, livery. Get the safety stuff right first. Everything else is optional.

Part 2: Driver Gear Requirements

Every driver needs their own gear. You cannot share a helmet. You can share some other items in a pinch, but fit matters for safety, and ill-fitting gear is a problem. Here's what each driver needs.

Helmet

Lemons requires a Snell SA-rated helmet. Check the current rulebook for exactly which SA ratings are accepted. Snell SA2020 and the newer SA2025 are the current standards, and older ratings eventually age out. Snell M (motorcycle) ratings are sometimes accepted at certain run groups; confirm with your specific event.

For Lemons racing helmet requirements, the key points are:

• Snell SA rating — not just DOT, not just ECE
• No visible damage, no cracks in the shell, no compromised liner
• Proper fit — snug with no pressure points, no movement when you shake your head
• Full-face is strongly recommended; open-face is sometimes allowed but offers less protection

Don't buy a used helmet unless you know its full history. Helmets can sustain invisible structural damage. A $200 new entry-level Snell SA2020 helmet is a better choice than a $50 used helmet with unknown history.

Racing Suit

A fire-resistant racing suit is required. For Lemons racing suit requirements, a single-layer SFI 3.2A/1 or FIA 8856-2018 suit meets the minimum standard for most run groups.

Single-layer vs. multi-layer:

• Single-layer suits are lighter, cooler, and more affordable. They're fine for most Lemons events and beginner endurance racing.
• Multi-layer suits offer more fire protection and are required at higher competition levels. For Lemons, they're not required but are a worthwhile upgrade if you plan to race regularly.

Comfort matters in endurance racing. You may be in the car for 2-3 hour stints. A suit that fits well and breathes reasonably is worth paying a little more for. A suit that's too tight or too hot makes a long stint miserable.

Check the manufacture date. SFI suits expire. An expired suit fails tech.

Racing Gloves

Fire-resistant racing gloves are required. SFI 3.3 or FIA 8856-rated gloves are the standard. Fit matters — gloves that are too thick reduce steering feel, which you'll notice over a long stint. Thin, well-fitted gloves are almost always the better choice.

For team racing, gloves are one item where each driver really should have their own. Shared gloves that don't fit are uncomfortable and reduce grip feel.

Racing Shoes

Fire-resistant racing shoes are required. SFI or FIA-rated shoes with a thin, flexible sole for pedal feel. Street shoes — even performance driving shoes — are not the same and may not pass tech.

Entry-level racing shoes from established brands are affordable and work well. This is not an area where you need to spend a lot to get something that does the job.

HANS Device and Head Restraints

A HANS (Head and Neck Support) device is required when running a multi-point harness. This is not negotiable and it's not just a rulebook requirement — it's the difference between walking away from a frontal impact and not.

The HANS device works with your helmet's anchor points (SFI 38.1 or FIA 8858 rated tethers) to limit head and neck movement in a crash. Running a harness without a HANS device can actually make injuries worse in certain crash types. The harness holds your body; the HANS holds your head. They work as a system.

HANS devices come in different sizes and post angles. Make sure yours fits your helmet and your body correctly. This is worth getting right.

Neck Collar (If Not Running HANS)

If your event allows a neck collar instead of a HANS device (some beginner run groups do), a fire-resistant neck collar provides basic support. It is not a substitute for a HANS device in a car with a full harness. If you're running a harness, run a HANS. Full stop.

FIA vs SFI for Lemons Drivers

For most Lemons events, SFI-rated gear meets the minimum requirements and is generally more affordable. FIA-rated gear is the international standard and is often considered more rigorous. Either works for Lemons. If you're planning to race in other series beyond Lemons, FIA gear tends to have broader acceptance.

The practical advice: buy gear that meets the current Lemons rulebook requirements, fits well, and is from a reputable brand. Don't buy the cheapest possible option on each item, but don't buy the most expensive either. Mid-range gear from established brands hits the sweet spot for budget endurance racing.

Shared Gear Considerations for Teams

Teams often try to share gear to save money. Here's what works and what doesn't:

• Never share helmets. Fit is too critical and helmets are personal safety items.
• Suits can be shared if drivers are similar in size, but fit matters for protection. A suit that's too big on one driver is a problem.
• HANS devices can sometimes be shared if drivers have the same post angle and size requirements. Confirm fit for each driver.
• Gloves and shoes are inexpensive enough that each driver should have their own.

Budgeting for Your First Lemons Event

Here's the honest breakdown of where to spend and where to save:

Spend on:

• Cage quality — a bad cage is not a bargain
• Harness mounting — do it right or don't do it
• Helmet — buy new or buy used with verified history only
• HANS device — not optional if you're running a harness
• Brakes — fresh pads, rotors, and fluid before every event

Save on:

• Tires — good used performance tires are fine for a first event
• Power modifications — reliability beats horsepower in Lemons
• Aero — you don't need it
• Suit and gloves — mid-range is fine, you don't need top-tier gear for Lemons

Buying Used vs. New Gear

• Helmets: Buy new unless you have verified history on a used one. Not worth the risk.
• Suits: Used suits are fine if they're in good condition and the manufacture date is current. Check for burns, tears, and expired ratings.
• Harnesses: Check the manufacture date. Expired harnesses fail tech and are not safe. If the date is close to expiry, buy new.
• HANS devices: Used is generally fine — they don't expire the same way soft goods do. Inspect for cracks or damage.
• Gloves and shoes: New is inexpensive enough that it's usually worth it.

Passing Tech Inspection

Tech inspection is not the enemy. It exists because people have gotten hurt when cars weren't built correctly. The inspectors want you to race. Help them help you:

• Bring your rulebook and know what's required
• Have all gear tags visible and legible
• Know the manufacture dates on your harness and suit
• Make sure the kill switch is clearly marked and functional
• Have tow straps mounted securely and clearly visible
• Be ready to demonstrate that the window net releases properly
• Don't argue with tech inspectors. Fix the problem.

Your Lemons Rookie Checklist

Car

• Roll cage (properly welded, padded at head contact points)
• Fixed-back racing seat (properly mounted to chassis)
• 5- or 6-point harness (current SFI date, properly mounted)
• Fire extinguisher (mounted, accessible, rated)
• Kill switch (accessible inside and outside, properly marked)
• Window net (driver's side, properly latched)
• Front and rear flexible tow straps (securely mounted, bright color)
• Fresh brakes (pads, rotors, high-temp fluid)
• No fluid leaks
• Cooling system in good shape

Driver Gear

• Snell SA-rated helmet
• SFI or FIA fire-resistant racing suit (current manufacture date)
• SFI or FIA racing gloves
• SFI or FIA racing shoes
• HANS device (required with harness)
• Balaclava (recommended, required at some events)

Final Thoughts

The teams that finish Lemons races are not the ones with the fastest cars. They're the ones with reliable cars, prepared drivers, and enough spare parts to handle what goes wrong. And something always goes wrong.

Build a car that's safe, simple, and sorted. Get your gear right. Show up to tech with everything in order. Then go have one of the best weekends of your life.

At FastLap Supply, we carry the helmets, suits, gloves, shoes, and head restraints that Lemons teams actually use. If you're putting together your first endurance racing kit and want to make sure you're buying the right stuff, we're here to help you figure it out.