Complete car + radio combo below. The MR-04 is what we race weekly — parts support is in the shop.
New to 1/28 Racing? Start Here
Open the box. Charge up. Race tonight.
A Kyosho Mini-Z ReadySet is a complete race car — chassis, body, electronics, and radio in one box. Pick a body you love, add batteries, and you're on the grid at NWLA RC this week.
Pick Your Car Race Nights
🏁 Free shipping over $100
🔧 Trackside setup help
🚗 Loaner cars — try first
📍 NWLA's home track
Everything you need: 3 things
The honest answer to "what else do I have to buy?"
8 total: 4 AAA in the car, 4 AA in the radio. Shop batteries.
One 4-bay charger runs your whole night. Shop chargers.
In stock & ready to ship
Genuine Kyosho Mini-Z ReadySets with the KT-531P 2.4GHz radio included.
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From box to race night in 4 laps
Most new drivers are running laps within 15 minutes of opening the box.
- Unbox & load batteries4 AAA in the car, 4 AA in the radio. Pre-paired from Kyosho.
- Power on & trimRadio first, then car. Adjust steering trim until it tracks straight.
- Practice lapsSmooth thumbs win races. Our track on practice days — help is free.
- Show up & raceBox Stock class is built for ReadySets. We'll handle the rest.
New racer questions
Asked at the track every week — answered honestly.
Is a Mini-Z hard to drive?
A learning curve measured in minutes, not weeks. Turn the radio's dual-rate steering down at first and the car becomes very forgiving.
Can my kid race one?
Yes — kids race alongside adults at NWLA RC every week. Want to test the waters? Use a loaner car on a practice night before buying anything.
What if I break something?
Parts are cheap and on the shelf at the track. Most crash repairs cost under $20 and take minutes.
Which body should I pick?
The one you think looks coolest — the chassis underneath is the same. You'll drive more with a car you love looking at.
Do I need upgrades to race?
No. Box Stock class exists so ReadySets race competitively out of the box. Upgrades are a fun rabbit hole later.
Lights out in 3… 2… 1…
Pick your car, grab batteries and a charger, and we'll see you at the track. Stuck deciding? Message us.
Shop ReadySet Cars Ask Us FirstRules: Updated 6/15/2026
UltraStock Class (50% Class)
Built for close, door-to-door racing. Great for beginners and veterans looking for fun, equal racing. New racers are paired with experienced ones to improve consistency and race craft. Every car is performance-matched thanks to the 50% throttle cap.
RULES
• Kyosho Mini-Z only
• Gens Ace AAA Battery Only
• 50% throttle-Training Mode
• Stock remote
• Stock gearing (6T pinion)
• Stock Kyosho white-endbell motor
• Stock T-plate• Kyosho 0 degree aluminum steering knuckles allowed
• Aluminum wheel nuts allowed
• Spec Tires: Fronts- Kyosho MZW40-30 Rears- Kyosho MZW38-20B
• Any body and wheel combo allowed
Kyosho Box Stock Class
A simple upgrade path for new racers. Lets drivers experience tuning and setup changes using only Kyosho parts, keeping costs and complexity down.
RULES
• Kyosho Mini-Z only
• Gens Ace or Speed House AAA's Only
• Aftermarket remotes allowed
• Any gearing included in the box (max 9T)
• Stock Kyosho white-endbell motor
• Any Kyosho Tire setup allowed • Any T-plate allowed
• Kyosho 0 degree aluminum steering knuckles allowed
• Aluminum wheel nuts allowed
• Servo gear upgrades allowed
• Any plastic body and wheels allowed
Mini Z Modified
This is our modified version of Box Stock. This is a box stock Chassis but everything is on the table.
RULES
Approved Chassis: 86mm-102mm. MR04, MR03, MR02, MA03, MA02, if Special Ed chassis or EVO is used, hop-ups must be removed.
Electronics: Kyosho Mini-Z RTR electronics package. Radio changes are allowed.
Motor: Any factory installed style motor ex. original, xspeed, PN S01.
Gearing limit: Factory plastic pinions only max 9t.
Differential: Kit plastic gear differentials, with steel shaft.
Battery: 4xAAA NiMH batteries.
Body: Any plastic style body. Body reinforcement and bumpers are permitted. Clearance issues may be addressed, front splitters may be rounded. Wing replacements allowed.
Wheels: Mini-Z type wheels. Front: 8.5 x 20mm max. Rear: 11 x 20mm max. Must fit inside body.
Tires: Any Brand Rubber tires. No silicone. No tire sauces. 70% alcohol to clean allowed.
Performance/Durability option parts: Kingpin Flip, bearings, T-plates, wheel nuts, servo gears, motor wire upgrade max 20g, aluminum front knuckles 0°, aluminum toe in/out plate 0° (KY/R246).
2500 Lipo
Approved Chassis: Any 1/28 scale AAA-based chassis (ex: Kyosho, PNR2.5, etc.), or Any 2S-lipo based chassis (ex: Atomic, GL Racing, RTRC, MWX, Reflex Racing, etc. 86-102mm wheelbase.
Electronics: Open brand, blinky mode (No turbo/timing/boost/etc.)
Motor: 2500kv/2S, 3500kv/AAA, or EVO5600kv/AAA.
Gear limit: 2500kv/2S = 14P/53S. All other combos on AAA = open gearing. Performance/Durability option parts: Open.
Body: Kyosho or GL, Mini-Z compatible purpose-built hard body. Lexan window & wings permitted. Bodies may be altered for wheelbase, but the body must cover the tires viewed from above. Small body parts may be omitted. Front splitters and body sides may be trimmed for track clearance.
Wheels: Mini-Z type wheels, plastic or aluminum. Front: 8.5 x 20mm max. Rear: 14 x 20mm max. Must fit inside the body.
Tires: Rubber tires from any company. No silicone. No tire sauces. 70% alcohol permitted to clean tires.
Formula 1
Approved Chassis: MWX F1, GLF1, FX28, or GL Formula One.
Electronics: Open,
Motor: 2500kv (Gearing: 14P/53S.)
Body/Paint: F1 Livery/Theme encouraged.
Wheels/Tires: PN or GL 'F1 specific' wheels. Any tire combos are allowed. 19mm-20mm wheels allowed.
3500 Lipo
In addition to 2500 (Stock Touring) rules, the following:
Approved Chassis & Parts Mfgs: Any 1/28 chassis. 86-102mm wheelbase.
Electronics: Open brand.
Performance/Durability option parts: Open.
Spec Motor: 3500kv (2S)
Gear limit: 12P
Battery: Any brand 4xAAA NiMH batteries. Any brand 2S 500mah MAX 2S LiPOs.
Body: Rules Same as Stock Touring, in addition, Full Lexan bodies are permitted.
Wheels/Tires: Front: 11 x 20mm max. Rear: 14 x 20mm max. Must fit inside the body.
Modified (AWD, GT and Pan)
Approved Chassis & Parts Mfgs: Any 1/28 chassis. 86-114mm wheelbase.
Electronics: Open with any ESC settings.
Motor: Open.
Battery: Open.
Drivetrain: 2WD and 4WD - allowed.
Bodies: All Lexan.
Wheels/Tires: Front: 11 x 22mm max. Rear: 14 x 22mm max.
* Rules will be revisited/adjusted as needed.