Slash Modified BL-2S 1/10 Scale

From the Parkflyers RC workbench

Marc's Take

The tires and shocks were the real story on the dirt oval.

I tested the Traxxas Mudboss-style BL-2s oval racer box stock, and its grip and suspension impressed me before I started tuning.

A useful tire and shock combination. The tires worked well on the dirt surfaces I tried, while the GTR shocks felt more appropriate for this racing platform.
A promising starting setup. I liked its out-of-box manners and could see room to explore differential oil, camber and steering setup.
One detail I was less sold on. The clipless body latch did not give me the positive, tactile feel I wanted.

My take: an interesting ready-to-run oval platform with a strong foundation in the tires and suspension. Check your local class rules before choosing a race car.

Shop this model's spare parts & upgrades — see current prices and available options.

Video is the original Mudboss review. Current race rules and supplied equipment should be confirmed for this listing.

Marc Mamiye · Owner, Parkflyers RC

Watch Marc's video

Product description

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MODEL SPECS

Model Name:	Slash Mudboss BL-2s
Model Type:	Short Course Trucks
Model Speed:	35+
Model Skill Level:	1
Scale:	1/10
Weight:	5.62 pounds (2.55 kg)
Length:	25.8 inches (656 mm)
Width:	12.3 inches (313 mm)
Front Track:	12.3 inches (313 mm)
Rear Track:	12.3 inches (313 mm)
Height:	8.52 inches (216 mm)

Wheelbase:	12.3 inches (333 mm)
Center Ground Clearance:	1.38 inches (35 mm)
Drivetrain:	2WD
Transmission:	Magnum 272R™
Differential Type:	Sealed, hardened steel bevel, limited slip
Gear Ratio (Internal):	9.10:1
Gear Pitch:	48 pitch
Servo(s):	2075 digital high-torque waterproof
Radio System:	TQ™ 2.4 GHz 2-channel radio
Battery Compartment Specs:	165 mm X 50 mm X 23 mm, 25 mm

MOTOR SPECS

Motor Name:	BL-2s 3300 kV
Motor Type:	Sensorless brushless
Motor Weight:	7.51 ounces (213 g)
Motor Length:	3.15 inches (80 mm)
Motor Diameter:	1.42 inches (36 mm)
Motor Shaft Size:	3 mm
Motor Connector Type:	Traxxas Quick Connect Motor Plug

ESC SPECS

ESC Name:	BL-2s Electronic Speed Control
ESC Type:	Brushless
ESC Case Size:	1.53″ (39 mm) x 2.31″ (59 mm) x 1.21″ (31 mm)
ESC Weight:	3.07 ounces (87 g)
Motor Connectors:	Traxxas Quick Connect Motor Plug
Battery Connectors:	Traxxas High-Current Connector

Clipless Dirt Oval Body
- Tough front and rear tube-style bumpers
- Body reinforcements to prevent pull-through damage
- Roll cage with molded driver figure
- Holds tight for intense action
- Quick and easy removal
- Smooth appearance with no body posts or clips
- Full-width molded rear wing
Extreme Heavy Duty Upgrade Parts Installed
- Strengthened C-hubs, axle carriers, and steering blocks
- Extreme heavy duty driveshafts
BL-2s™ Waterproof Electronic Speed Control
- Heat sink accepts accessory cooling fan
- Three programmable drive profiles
  - Sport Mode - forward / brake / reverse
  - Race Mode - forward / brake
  - Training Mode™ - 50% forward / brake / 50% reverse (patented)
- Traxxas EZ-Set^® one-button setup
- LiPo and NiMH compatible with two-stage low-voltage detection
- NiMH battery packs: 6-7 cells (7.2 to 8.4 volts)
- LiPo battery packs: 2 cells (7.4 volts)

3300 kV Brushless Motor
- Integrated cooling fan
- Low-maintenance design
- Efficient ball bearings
- 3300 kV
TQ™ 2.4 GHz 2-Channel radio system
- Ergonomic transmitter with internal antenna
- Traxxas 6519 3-channel micro receiver with fail-safe security
Magnum 272R™ Transmission
- Heavy-duty low-CG case
  - Thick 3.2 mm aluminum motor plate
  - Case supported bearings
- Fixed gear mesh
- High-strength steel gears
- Sealed bevel-gear differential
- Easy differential access
Steering
- Chassis-mounted 2075 servo
- Dual bellcrank design with integrated servo saver

Low-CG Chassis
- Modular composite tub design
- Secure battery hold-down latch
- Side nerf bars for impact resistance
Suspension
- Heavy duty suspension arms
- 4 mm adjustable steel turnbuckles
- Captured links won’t pop off
Aluminum PTFE-coated GTR Shocks
- Titanium nitride coated shafts
- 70% more oil capacity than standard Ultra Shocks
- Threaded bodies with adjustable spring collars
Drivetrain
- Torque Control™ slipper clutch
Wheels and Tires
- Graphite gray "steelie" dirt oval wheels
  - 2.2″ outer diameter, 3″ inner diameter
- Licensed Hoosier^® Angle Block racing tires
  - Wide tread blocks for consistent and predictable performance
Rubber-Sealed Ball Bearings
Precision Hex Hardware

What’s In The Box:

Slash Mudboss with BL-2s ESC and 3300 kV motor
Quick Start Guide
TQ™ 2.4 GHz radio system
High quality maintenance tools
Decal sheets with livery numbers

What You’ll Need:

Batteries
Slash Mudboss requires a single NiMH or LiPo battery. See full list of batteries.
Charger
Traxxas EZ-Peak Live charger (2971) is recommended for easy and fast charging performance.
AA Alkaline Batteries
Four AA alkaline batteries for the transmitter.

Includes:

(1) Slash Modified 1/10 RTR 2WD Dirt Oval Racer
(1) 2.4GHz Radio System
(1) Instruction Manual

Needed To Complete:

(1) 2S LiPo Battery with Traxxas ID Connector
(1) Compatible Battery Charger
(4) AA Batteries for Transmitter

Specifications:

Scale	1:10
Drive	2WD
Power Source	2S LiPo
Length	25.8in (656mm)
Wheelbase	13.1in (333mm)
Width	12.3in (313mm)
Height	8.52in (216mm)
Weight (w/o Battery)	5.62lbs (2.55kg)
Assembly Level	RTR
Electronics
Motor:	BL-2s 3300Kv Brushless
ESC	BL-2s
Connector	Traxxas ID
Servo	Digital 2075
Wheels
Front	"steelie"
Rear	"steelie"
Hex	12mm
Tires
Front	Licensed Hoosier® Angle Block
Rear	Licensed Hoosier® Angle Block

1/10 Scale Modified Oval Racing Action!

The Slash® Modified from Traxxas® is built for high-performance dirt oval racing. Featuring robust Extreme Heavy Duty components and a powerful BL-2s™ brushless system, this ready-to-run racer delivers exceptional speed, durability, and track dominance. With advanced features like a Magnum 272R™ transmission, clipless race body, and replica Hoosier tires, the Slash Modified offers unbeatable reliability and race-winning performance right out of the box.

About the Slash Modified

BL-2s Brushless Power System

The BL-2s brushless system delivers outstanding speed, rapid acceleration, and precise throttle control. Its internal cooling fan and high-efficiency design ensure long-lasting performance. With no brushes to wear out, this 3300 Kv motor provides low-maintenance durability for extended race sessions.

Extreme Heavy Duty Components

Designed to handle rough racing conditions, the Slash Modified comes equipped with Extreme Heavy Duty suspension arms, axles, and drivetrain parts. These upgrades enhance durability and ensure reliability through the toughest competition, keeping you in the race until the end.

Pro Series Magnum 272R™ Transmission

The Magnum 272R transmission features all-metal gears, a sealed silicone-filled differential, and an aluminum motor plate for maximum durability and performance. Its low-CG design improves weight distribution, offering superior traction and handling for tight track maneuvers.

Features:

BL-2s brushless power system
Extreme Heavy Duty suspension and drivetrain components
Pro Series Magnum 272R transmission
Clipless race body with internal reinforcement
Replica Hoosier Angle Block tires on graphite gray wheels
Aluminum GTR shocks with threaded collars
Low-CG chassis for improved handling
Ready-To-Race® straight out of the box
Highly detailed dirt oval design
Designed for all-day racing durability

Engineered for Speed. Built for Control.

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