Losi 1/10 Comp Rock Crawler Race Roller

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Low Price: $189.99
Discontinued Online

Incorporating real engineering elements from full-size rock crawling competition, the 1/10 Comp Crawler represents the pinnacle of RC rock crawling design. Every part, every feature and every inch is designed to mimic real-world competition platforms, resulting in the most advanced 1/10-scale radio control crawler ever developed.

The list of innovations that make the Comp Crawler an RC revolution is long, and it starts with a solid foundation. The Twin Vertical Plate (TVP) chassis with adjustable upper shock mounts offers unbeatable stability and rigidity in a durable, lightweight design. The result is confident handling over any terrain and outstanding suspension articulation. And Losi Racing has gone one step further, by offering this innovative crawling chassis pre-built and tuned right out of the box. All you have to do is add the electronics of your choice and paint the included Lexan Grapler Pro body.

Losi Racing’s Comp Crawler is the first rock crawling platform in the industry to offer a revolutionary front and rear “dig” transmission. The use of an optional third channel setup allows the front or rear drive axle to be disengaged, locking the wheels in place and acting as a steering brake for precise lateral movement on and over obstacles. The transmission case has been fitted with adjustable servo mounts that will allow for the use of most “mini” servos and includes an aluminum servo arm. The third channel on a 3-channel radio (such as the Spektrum DX3R) allows the full use of the DIG transmission, and also requires a micro servo installation for actuation. If you do not have a 3-channel radio system or extra servo there is no need to worry - the Comp Crawler will function with full time 4wd with our without a dig servo hooked up.

The solid axle setup on the Comp Crawler offers a significant reduction in flex for improved performance. Inside, the axles utilize a worm gear drive for outstanding precision in throttle control and maneuverability. Another benefit of the worm gear drivetrain design is the elimination of the “torque twist” commonly found in shaft driven rock crawlers. As a result, the Comp Crawler stays in contact with the ground for uninterrupted grip.

The Comp Crawler features a 4 link suspension layout that offers 70 degrees of suspension articulation. This specially designed 4-link suspension setup is used in combination with the twin vertical plate chassis to reduce axle swing and eliminate side-to-side movement for increased steering and maneuvering precision. 7mm diameter aluminum suspension links are hard anodized and triangulated to the center of the chassis for better balance front to rear when the suspension starts to twist. 4” Aluminum threaded shocks with Titanium Nitride (TiNi) shafts allow the suspension to articulate without any binds.

Designed with the demanding conditions of competition rock crawling in mind, the steering system on the Comp Crawler provides precise control as well as class leading performance with 45 degrees of steering throw. The front caster blocks feature 10 degrees of caster and the spindles are attached with heavy duty steel king pins. The steering geometry also allowed Losi Racing engineers to raise the main steering link closer to the axle housing, giving the Crawler additional clearance when approaching obstacles.

Just like full-size crawlers, the 1/10 Comp Crawler utilizes functional beadlock wheels with aluminum outer rings. The functioning beadlock allows for the tires to maintain more contact and traction, while the aluminum outer rings provide evenly distributed pressure for unbeatable tire mounting. Losi’s National Champion Rock Claws 2.2 Tires come mounted on the beadlock wheels, complete with foam inserts. The added ground clearance from the Rock Claws tires makes conquering any and all courses easier.


  • Compact Front & Rear Locking (DIG) Center Transmission allows the crawler to overtake obstacles with ease
  • Front and Rear Solid Axle with Worm Gear Drive
  • 4-Link Suspension offers 70 degrees of articulation and minimizes front and rear axle swing, allowing for more precise handling
  • Zero Ackerman Steering provides class leading performance with 45 degrees of steering throw
  • Front and Rear locked differential provides full time 4wd
  • 3-Piece 2.2" Bead Lock Wheels with aluminum outer rings
  • National Champion 2.2 Losi Rock Claws Tires with foam inserts
  • Twin Vertical Plate Chassis with adjustable upper shock mounts
  • 4" Aluminum Threaded Shocks with Titanium Nitride (TiNi) Shafts allow the suspension to articulate without any binds.
  • Durable, telescoping CV drive shafts allow for increased steering range
  • Aluminum Upper and Lower Suspension Links for added strength
  • Lexan Grappler Pro body is optimized to USRCCA Rules and allows for clearance of the tires as they articulate
  • Race Roller Chassis is preassembled; simply add electronics, paint the body and go
Type: Competition 2.2 Rock Crawler Race Roller
Scale: 1/10 (2.2)
Length: 17.5 inches (444.5mm)
Width: 10.5 inches (266.7mm)
Wheelbase: 12.5 inches (317.5 mm)
Weight: 4.18 lbs. (1.9kg)
Chassis: Twin Verticle Plate
Suspension: 4-Link
Tire Type: National Champion Losi Rock Claws 2.2
Wheel Size: 2.2" Bead Lock
Kit/RTR: Race Roller
Shock Type: 4" Aluminum with Titanium Nitride (TiNi) shafts
Body: Clear Lexan Grappler Pro

You will need...

Basic set-up
  • 17.5 T Brushless Motor and ESC (LOSB9553 Xcelorin Sensored 17.5T ESC/Motor Combo)
  • 2-3-Cell LiPo (LOSB9865 11.1V 1350mAh 3S 20C LiPo)
  • Charger for above battery (LOSB9605 Intelligent Lithium Charger)
  • High torque Steering Servo (Min. of 200oz) (JRPSZ9100T Digital Ultra-Torque MG Servo)
  • 2 Channel Radio System
  • Paint
Advanced Completion: To take full advantage of the DIG set-up and the true potential of the 1/10 Comp Crawler 3-Channel Radio System w/ 3 position 3rd channel switch

This product was added to our catalog on June 3, 2009

Wednesday, Mar 16 2011 (about 9 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
This is a great crawler! Very capable with the stock setup. I did swap out the slipper unit for the non slipper unit because the slipper just would not lock down enough. Cut out a portion of the tire foams and added 6 ounces of airsoft pellets to each front wheel and 2 ounces to each rear wheel and it works fantastic! A little tricky to get everything mounted and wires routed when using a system like the Novak Goat and 3s lipo given the external bec and 2nd switch to mount. Didn't like the esc over the rear axle so I mounted it on the receiver platform and mounted the receiver on the dig servo to avoid all the esc wires from possible damage from all the suspension articulation. Be careful with motor temps until you get your gearing right. Very easy to get into trouble if running too big of a pinion. Also be cautious not to over shim the diff spools. A very slight amount of side to side play will help avoid binding, and grease the heck out of them (marine grease works great). I bought this for something to "play" with at the local track between heats and find myself crawling all sorts of stuff with it. A lot of fun and well suited for both competition and play duties.
Sunday, Mar 6 2011 (about 9 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
Great rig,so beautiful worked!The price is very good,and quality is what i expected from losi!
Verified Owner
Thursday, Sep 24 2009 (about 10 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
FYI. The kit comes with Aluminum Servo Arm for JR/Air (#23) and Hitec sevos (#24), but NOT for Futaba servos, so if you're running either JR or Hitec you can save $8.49 by not buying the alum arm seperately. Also, go through the roller!!! During the inspection of mine (bought 9/09), one of the driveshafts fell off and the front castor blocks were installed backwards.
Saturday, Jul 25 2009 (about 10 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
this thing rocks and the dig is awsome go buy it now vary happy
Thursday, Jul 2 2009 (about 10 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
Great Crawler! And as far as the axles, They have already updated them, contact losi and they will send the new versions no charge. The DO stand behind their products, have fun,see ya on the rocks!
Wednesday, Jun 17 2009 (about 10 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
Yeah this kit is very motor/gearing picky. It realy only runs well with brushless. There are few bugs but losi is replacing them all so far.
Friday, Jun 12 2009 (about 10 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
Well if you can get past the overheating of motors and the breaking of axles this is a great crawler.

You almost have to use a brushless motor. If you limit your EPA on steering lock you will have a better chance of not breaking axles as often.

Overall Losi needs to address a few issues and this will be the crawler to beat for 09.
Verified Owner
Thursday, Jun 9 2011 (about 8 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
don't use dx3s transmitter, it only has 2 position aux switch not 3 position. As usual that information is only available to Cyborgs and Jedi's and is not stated on the products page.
Saturday, Dec 26 2009 (about 10 years ago)
Losi 1/10 Comp Rock Crawler Race Roller
Thing is Nasty, went with Novak rooster style and I luv it, worm gear, DX3R and your in heaven