VehiclesTamiya Lunch Box Evo.

Tamiya Lunch Box Evo. Chassis

Name: Tamiya Lunch Box Evo.
Brand: Tamiya

1/12 scale · 2WD monster truck chassis · sold as kits

Tamiya's Lunch Box Evo. chassis is a 1/12 two-wheel-drive big-tire chassis with a box frame, double wishbone front suspension and a three-link rigid rear axle, sold as the Lunch Box Evo. kit, 58755.

It prints 14.7:1 with the stock 10T pinion, and its 217 mm wheelbase and wider track make it steadier than the CW-01 it grew from, while the aluminum wheelie bar still lets it lift the front on hard throttle. The pinion, motor and tires come with each kit rather than with the chassis, so enter yours in the gearing tool.

Final drive: 14.70:1on 10T
Wheelbase: 217mm
Introduced: 2026

Gearing Top speedsourced

The pinion, motor and tires come with each kit: enter yours in the gearing tool.

Tamiya Lunch Box Evo. — Photo: Tamiya (opens in a new tab)

Kits on this chassis Built on the Lunch Box Evo.

Each kit adds its own body, tires, pinion and motor. The chassis figures below apply to all of them.

Kit	Part no.	Maker page
Lunch Box Evo.	58755	tamiya.comPage (opens in a new tab)

Specifications

Last modified Sep 28, 2026

Spec	Value	Basis
Vehicle
Class The kind of vehicle the maker sells it as. It sets what the car is built to do and which cars it is fair to compare it with. Monster trucks have tall tires and long suspension travel, built for jumping and rough ground rather than a race track. Drive Only one axle is driven, the rear on almost every 2WD RC car. It is lighter and simpler, and it takes more throttle control on loose ground. Build A kit you build yourself from parts. Most kits come without motor, ESC, servo, radio and battery, and many without tires or a painted body. The manual lists what to add. Scale The maker's nominal size compared with a full-size vehicle. It works more as a class label than a measurement. A 1/10 monster truck is far bigger than a 1/10 touring car, so compare length and weight for real size.
Class	Monster truck
Drive	2WD
Build	Kit
Scale	1/12
Drivetrain
Pinion The small gear on the motor shaft. Fewer teeth gear the car shorter: quicker acceleration, lower top speed and a cooler motor. More teeth do the opposite. On a chassis sold as kits, each kit brings its own. Spur The large gear the pinion drives. A bigger spur with the same pinion gears the car shorter. Pinion and spur must have the same pitch, or tooth size, to mesh. Transmission & axle Every reduction after the spur, multiplied together: transmission, differentials and axle gears. It is fixed by the design; the gearing you change is the pinion and spur. Final drive How many times the motor turns for one turn of the wheels. A higher number is shorter gearing: more acceleration and pulling power, less top speed.
Pinion	With each kit
Spur	Not published
Transmission & axle	Not published
Final drive	14.70:1 on 10TMaker's chart	Maker's chart
Wheels & tires
Tire diameter The outside diameter of the mounted tire, tread to tread. A taller tire covers more ground each turn, which gears the car taller. At high speed tires can balloon and grow, so the real gearing gets taller as the car goes faster.
Tire diameter	With each kit
Power
Motor Motor KV is the RPM a motor turns per volt with no load. This vehicle comes without a motor, so there is no stock KV; it depends on the one you fit. Battery The highest LiPo cell count the maker rates the electronics for. This vehicle comes without electronics, so it depends on the ESC and motor you fit.
Motor	With each kit
Battery	With each kit
Size & weight
Wheelbase The distance between the front and rear axle centers. A longer wheelbase is steadier at speed and over bumps; a shorter one turns more tightly.
Wheelbase	217 mm8.5 inStock	Stock

How to read these figures

Stock is as the vehicle ships.
Calculated is worked from the stock figures on this page rather than stored beside them, so the two cannot drift apart.
Not published means it exists but no source we could find prints it.
With each kit means each kit on this chassis brings its own, so enter yours in the gearing tool.
Maker’s chart is the ratios the maker prints for this chassis with the pinions it names.

Other versions of this chassis

CW-01ChassisBig-tire 2WD chassis · 1987

How these numbers were settled

Tamiya lists this as its own chassis, 'ランチボックスEvoシャーシ' (chassis list 6202, apart from the CW-01's 6201), and its manual download page labels the manual 'CW-01EVO.', so it sits in the CW-01 family.

It keeps the big-tire 2WD layout with a box frame but has double wishbone front suspension, a three-link rigid rear axle with a stabilizer, CVA oil dampers and a wheelbase 10mm longer than the original Lunch Box.
The manual (58755) fits a 10T pinion (MA30, step 10, p. 8) with no spur or gearbox tooth counts, so the printed total is the only gearing fact: the kit page prints 'ギヤ比=14.7:1', the same pinion x ratio as the CW-01.
The page gives a 217mm wheelbase.
Tamiya sells it as the Lunch Box Evo.
(58755).
The pinion, motor and tires come with the kit, so they are not part of the chassis figures: enter yours in the gearing tool.

Sources

Every figure on this page traces to one of these; where they disagreed, the note above says which was used and why. Links open in a new tab.

Maker documents

Lunch Box Evo. instruction manual (Tamiya PDF) (opens in a new tab)10T pinion, step 10 p. 8d7z22c0gz59ng.cloudfront.netUsed forMain specs

Parts and electronics

Product info EX (opens in a new tab)tamiya.comUsed forMain specs
Products 58755 (opens in a new tab)tamiya.comUsed forMain specsSize
Products 58755 (opens in a new tab)tamiya.comUsed forMain specsSize
RC (opens in a new tab)tamiya.comUsed forMain specs
Std.csv (opens in a new tab)tamiya.comUsed forMain specs

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