VehiclesArrma Kraton 6S BLX V6

Arrma Kraton 6S BLX V6

1/8 scale · monster truck · ARA8608V6

Top speed: 67mphcalculated
Final drive: 13.44:1
Tire: 169mm

Open in Top Speedsourced

Arrma Kraton 6S BLX V6 — Photo: Horizon Hobby

Specifications

Last modified Sep 24, 2026

Spec	Value	Basis
Drivetrain
Pinion	16TStock	Stock
Spur	50TStock	Stock
Transmission & axle	4.30:1Derived	Derived
Spur ÷ pinion	3.125:1Calculated	Calculated
Final drive	13.44:1Stock	Stock
Wheels & tires
Tire diameter	169mmStock	Stock
Rollout	39.5mm per motor turnCalculated	Calculated
Wheel hex	17 mmStock	Stock
Power
Motor	2050KVStock	Stock
Motor shaft	5 mmStock	Stock
Battery	Up to 6SLiPoStock	Stock
Stock motor	Spektrum Firma 4074 2050Kv Brushless MotorStock	Stock
Stock ESC	Spektrum Firma 150A Smart V2 Brushless 6S ESCStock	Stock
Battery connector	IC5Stock	Stock
Battery space	158 × 48 × 70 mmmax pack, L × W × HStock	Stock
Performance
Theoretical top speed	67.0mph on 6SCalculated	Calculated
Motor speed	45,510rpm, no loadCalculated	Calculated
Advertised top speed	65mphMaker's claim	Maker's claim
Chassis
Weight	5.61 kg (12.4 lb)Stock	Stock
Length	596 mm23.5 inStock	Stock
Width	466 mm18.3 inStock	Stock
Height	216 mm8.5 inStock	Stock
Wheelbase	377 mm14.8 inStock	Stock
Diff oil, front	80KStock	Stock
Diff oil, center	100KStock	Stock
Diff oil, rear	80KStock	Stock
Shock oil, front	1,300 cStStock	Stock
Shock oil, rear	1,300 cStStock	Stock
Vehicle
Part number	ARA8608V6
Scale	1/8
Class	Monster truck

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. Derived is worked out from gear tooth counts the maker publishes rather than printed as a ratio; the notes below say how. The top speed is kinematic: an ideal no-load RPM with no slip and no loss under load, so a real car is slower. The maker advertises 65 mph, which is their own claim on their own conditions.

Gearing parts

Pinion and spur parts for the Arrma Kraton 6S BLX V6: fitted, and optional gearing supplied in the box
Component	Teeth	Pitch	Bore	Part number
Fitted at the factory
Pinion	16T	Mod 1	5 mm	ARA310963 (opens in a new tab)
Spur	50T	Mod 1	Not applicable	ARA310978 (opens in a new tab)

Tooth counts are the ones in the specifications above. Pitch is given as metric module (Mod 1, Mod 0.8) or diametral pitch (32P, 48P). They are different standards and are not interchangeable, even where the numbers look close. Bore is the pinion’s hole, listed separately from the motor shaft (5 mm on the stock motor). Linked part numbers go to the maker's or official distributor's page for that part.

How these numbers were settled

The current Kraton 6S.

It is geared differently from the V5: Horizon's standard-parts list for ARA8608V6 names a single 16T HD pinion, where the V5 list and spec table give 12T.
The same list names a 50T spur on a limited-slip centre diff, and GP4 29mm diffs with a 43T spiral ring and 10T input gear (43/10 = 4.3), so final drive is 50/16 x 4.3 = 13.44.
The same 16T/50T set is printed on the Kraton 6S EXB V6 page.
Power is a Spektrum Firma 4074 2050Kv motor and the Firma 150A Smart ESC V2 rated for 3S to 6S.
The stock dBoots Copperhead2 MT 3.8 (ARA550059) prints an overall diameter of 6.5 in (169mm).
Stock gearing computes to about 67 mph at 3.7V per cell against Arrma's 65+ mph.

Documents

ManualOwner's manual (PDF) (opens in a new tab)Pinion change p. 23
Exploded viewExploded view (PDF) (opens in a new tab)
Parts listParts tech pack (PDF) (opens in a new tab)

Sources

Every figure on this page traces to one of these. Where they disagreed, the note above says which was used and why.