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R/C Tech

All-new features for 2018 XRAY T4

Sep 20 2017

2018 All-new Features

• All-new ULP (Ultra Low Profile) shocks with 4mm lower design for improved stability

• All-new ultra-low profile ULP shock towers to accommodate new ULP (Ultra Low Profile) shocks

• All-new chassis design with new motor mount plate position for further flex adjustment and motor moved more to center

• All-new top redesigned top deck works with the new layshaft bulkheads and motor mount which moves motor more to center

• All-new motor mount plate features new extra rearmost holes for improved traction and further flex adjustment

• All-new motor mount decreases the chassis roll with motor position more to center

• All-new in-line chassis flex set-up options

• All-new ECS drive shafts are 51mm long for optimized steering and stability


Better Together – Thunder Tiger + Graupner

Sep 12 2017

Starting September 2017, Graupner will start offering Thunder Tiger products also in the USA. We will carry all the Thunder Tiger product lines such as cars, boats, helicopters and airplanes and will expand eventually also in carrying spare parts.

We are excited for this unique cooperation where two strong brands with products known for their excellence are joining forces to serve our loyal customers.

O.S. Engines brings powerful performance to weekend warriors

Sep 7 2017

1/8 scale buggy competition is as fierce as it gets. You want every advantage possible — and it starts with the 21XR-B Version II engine.

This version of the 21XR-B power plant has been totally re-designed. It’s even more reliable, and the new 21J3-I carb is easy to tune. The aluminum cooling head ensures steady power even under harsh conditions.

And when you’re ready to move up to top competition, you can get up to speed with the 21XR-B Version II. This engine is upgradeable with high-performance O.S. Speed Parts, letting you realize your full winning potential. Equip your ride with the 21XR-B Version II, and start owning the podium.

  • Engineered for up-and-coming 1/8 scale buggy club racers, with upgrade capability for competing at the highest levels.
  • A dependable, low-maintenance engine that fits into most any modeler’s budget.
  • O.S. Speed parts are available for updating the outer and inner heads, crankcase, crankshaft and more.

RC4WD welcomes Rotiform as a licensed partner

Sep 6 2017

What’s Included:

  • 4x RC4WD Rotiform SNA 1.9″ Beadlock Wheels
  • 1x Miniature Scale Hex Bolt Tool for M2.5 & M3 Scale Bolts (2.5mm Hex) (Z-S0635)
  • 1x Rotiform Decal Sheet

Replacement Hardware:

  • Steel Flat Head Socket Cap Screws M2.5 x 6mm (10) (Z-S1205)
  • RC4WD Miniature Scale Hex Bolts (M2.5 x 6mm) (Silver) (Z-S0663)
  • Miniature Scale Hex Bolt Tool for M2.5 & M3 Scale Bolts (2.5mm Hex) (Z-S0635)

Your batteries need to be charged – Duratrax Onyx 260 overview

Sep 4 2017

In this video, I spend a little time with you talking about how I got to the Onyx 260 from the 255 and ultimately the 235. I also spend a little time charging a couple batteries and showing you the information and screens on the Onyx 260 battery charger from Duratrax.


LiPo 8000 2S 7.4v Dual Core Battery Pack


Redcat Racing 1:6 Shredder Monster Truck Reviewed

Sep 3 2017


It was 2008 when I reviewed the gas-powered Redcat Racing Rampage MT, and I somehow I haven’t had another product from Redcat Racing in my r/c garage until now.  Back then, I wrote that Redcat Racing was making a difference in the r/c world with new products that challenge the big companies, and the introduction of the 1:5 scale Rampage MT was going to tap into a market long dominated by one or two other products.

Fast forward nearly 10 years later and Redcat Racing is still going strong with an expanding product line and so is the Rampage MT, which is now on version 3. Redcat Racing has done all this through their network of dealers, service, and word of mouth, choosing to forgo advertising in favor of less expensive vehicles.  It’s easy then to forget they have a solid history in r/c and have a growing line of products at affordable prices.

While browsing RCU’s forums, I clicked into the Redcat Racing forum again and it didn’t take long for me to head over to their website to see what was new.  I was immediately impressed with the selection, given it’s been a while since I had last checked.  Of course, the Rampage MT jumped out at me as I remembered reviewing it in the past, which lead me to other vehicles where I eventually landed on the Shredder V2.0.

Here I am today, after having spent several weeks bashing the Shredder, ready to talk about it.



Initial inspection of the Shredder reveals a familiar design and layout, with a traditional chassis and suspension setup.  Obviously the size of a 1:6 scale rc has an impact compared to smaller 1:10 or even 1:8 scale r/c, but especially next to 1:18 scale I’ve been spending most of my time with in recent weeks.  It’s difficult to demonstrate in pictures or video just how big 1:6 scale is compared to other r/c vehicles, but I tried.  I set the Shredder wheel next to the very familiar Traxxas Slash and you can see in the picture below how the Slash is dwarfed in comparison to the Shredder’s wheel.  Let’s take a look at the details.

CHASSIS:  The chassis has a familiar build, but is built from 6061 aluminum and is a stout 3mm thick to handle the weight of this large monster truck.  With this chassis design, the layout could be just about anything because there’s so much room.  In this case, Redcat Racing has the electronics in the back, with the differential spur gear housing in the middle, and the large motor and steering servo toward the front.

SUSPENSION: The aluminum capped oil-filled big bore shocks are impressive at first glance.  They look like they can take a beating, and would be more than capable of handling the big jumps.  The suspension is adjustable and can connect to the shock tower in multiple positions.  You’ll see the stock setup in the video and turning is when you really notice the suspension at work.

During testing, after a hard crash landing, one of the upper suspension arms broke at the threads.  This was a bit unexpected as it’s not normally a place I would think to be a weak point in the suspension components, but it’s something to note.

DRIVETRAIN: I would prefer this large 1:6 scale Monster Truck to be 4×4, so of course that’s what you get in the Shredder. The center differential unit encompasses a plastic spur gear, which normally wouldn’t concern me.  However, I did break a few splines on my spur gear which is $34 to replace.  I believe it was more my fault than the spur gear as I didn’t inspect the motor mount after some hard bashing and crashing.  The result was a motor that shifted just enough to roach the spur gear.  Redcat Racing does offer a metal spur gear, but I really don’t think it’s necessary and reinstalled a plastic gear.  I’ve continued to run the Shredder hard over the last few weeks with no concern for the plastic spur gear.

STEERING: The steering servo needs to be very strong to turn these massive 6 1/2″ tall wheels.  Taking care of this is the Hexfly HS-15S, which is a full metal gear Servo Weight: 43g / 1.53ozSpeed: .24 @ 4.8v / .21 @ 6.0vTorque: 9kg*cm @ 4.8v / 10kg*cm @ 6.0v.  This servo just exactly what it’s supposed to do and holds full left or right steering no matter the speed or traction.  To date, it’s been strong and predictable.

WHEELS & TIRES: One of the things impacting the visual appeal of this truck is the size of the wheels and tires.  They are ridiculously large and as such Redcat Racing has chosen to bead-lock the foam-filled tires to the wheels.  Having stretched the tires to their rotational max at full throttle, I’m thankful to have these monster tires bead-locked to the wheels.



This is the area Redcat Racing saves some money by using Hobbywing and Flysky components.  Over the years, Hobbywing and Flysky have been more known in Europe, however, they have made a splash in the USA, so I’m comfortable saving money by having these installed in the truck.

BATTERIES: Redcat Racing is focused on introducing people to large scale rc, and not including batteries opens that door even further to get into 1:6.  There are many choices, but I always go back to MaxAmp batteries.  Because I review r/c, I tend to drive harder than most so I can find the limits of the vehicles.  As a result, I’ve had more RTR packs fail on me than I can count and prefer to run quality packs with proven performance.  I’ve crashed more MaxAmps packs, had them fly away from vehicles, had them submerged in water, had them buried in dirt and mud, and have been able to put them right back into action every time.

You can buy cheaper batteries, but that’s exactly what you get… a cheaper battery.  I prefer to invest a little more money for a battery that lasts rather than replacing cheap batteries because of the bloat after a little stress.  For the Shredder, I chose two MaxAmps 8000mah LiPo 7.4v packs.  They are 100% waterproof, dual core, race-edition packs, and they are perfect for the Shredder.

RECIEVER: The Shredder uses the Brushless 80A SC8-RTR ESC with fan from Hobbywing, which is labeled waterproof.  Digging a little further, I learned that it’s only splashproof and shouldn’t be submerged.  Same goes for the receiver.  I believe this is something Redcat Racing can change in the future as fully waterproof r/c is becoming the norm for bashing vehicles like the Shredder.

TRANSMITTER: Included with the Shredder is a Redcat Racing branded transmitter.  It’s familiar and comfortable, with a nice control panel for making adjustments.  In this case, the driver can adjust steering and throttle reversing, steering trim and dual rates, throttle trim,  and bind to the receiver.  It appears the receiver has different programming modes, but I was unable to find documentation to support these different modes.

Binding to the receiver requires a bind plug (included) and the receiver didn’t bind right away.  The binding instructions are clear, but depending on which version transmitter/receiver you have, the instructions may not work without a little assistance from customer support… who was very helpful in this regard.  It turns out I had a version that required the bind plug to inserted into a different channel rather than the instructed channel 3.  After knowing that, it worked perfectly and hasn’t been a problem since.


If you’ve never driven a large scale r/c truck, it’s a unique experience.  It doesn’t accelerate or stop as quickly as a 1:10 scale, and it certainly doesn’t win any awards for cornering abilities.  However, there is something special about driving something this large with the same transmitter that powers the smallest of r/c vehicles.

Given its length, the speed can be deceiving.  A 1:10 scale running 40+ mph can be a bit hairy depending on the vehicle.  With the Shredder, I never felt 40 mph was too much to handle.  In fact, I have no doubt this chassis and setup with handle 6S and I am to test that thought in the near future.  The suspension damping is so good at high speed the Shredder never feels twitchy or nervous.  It feels stable and planted, and it doesn’t matter if you’re on gravel, grass or the pavement.

You can see in the video how the weight and balance cause the Shredder to push through corners.  It’s only when you let off the throttle a bit that the suspension relaxes a little and allows those huge tires grip and turn in.  As such, drifting is not the Shredder’s strength, but it definitely wins points in stability.  This is one of those differences you have to adjust your driving style to when taking on this monster truck at high speed.

In the pictures below, the Shredder can easily be managed in the air.  Kicking off the ramp at full throttle will easily send the nose pointing to the sky, but it can easily be brought back to terra firma with a handful of brake.  It’s a little more challenging to lift the front with throttle if the nose is down, but it’s doable.  Going back to the traditional chassis and layout, having the batteries in the back as it works well to keep the Shredder wheels down when landing.  And that suspension damping is working overtime to avoid rebound from a big jump.  They soak up the jumps very nicely but will let the chassis slap the ground after impact if the jump is high enough.  Having nearly all the screws counter-sunk is the right thing to do and nice to see.

Apart from the upper suspension arm breaking, I’ve found the Shredder to be very bash worthy.  It has crashed into trees, fences, fence posts and more, yet keeps going strong.  MSRP is $399, but I’ve seen it as low as $359.99 online with a little searching and find that hard to beat if you want to get into large scale rc.  I do wish it was completely waterproof, but it will handle puddles, rain, and mud without too much trouble, which is where it will spend most of its time.  I might be a little more cautious around snow.

If you’re looking to get into large-scale r/c, I think you have to give the Shredder a look before you make a decision.



2018 Reedy International Off-Road Race of Champions Announced

Aug 31 2017

Reedy is pleased to announce that the 2018 Reedy International Off-Road Race of Champions will continue for a record-setting fifth consecutive year at OCRC Raceway in Huntington Beach, CA from January 18-21, 2018.

With four epic years of hosting the Reedy Race, OCRC remains the “Home of the Reedy Race.” On many racer’s “Bucket List,” the atmosphere and intensity of the race draws spectators and fans in from around the world, even if it’s just to watch and be a part of the most exciting event of the year.

In 2017, Ryan Cavalieri won an unprecedented fourth Invitational title, while Team Associated’s very own Brent Thielke achieved a 20-year goal of winning the 2WD Open class and break-out newcomer Broc Champlin took the victory in 4WD Open. All three racers will be back to compete in the Invitational class and look to become the 24th name etched on the Mike Reedy Heritage Trophy.

Entries for the 2018 Reedy International Off-Road Race of Champions open on September 1, 2017 at noon, PST exclusively on www.rcsignup.com and close September 30, 2017 at midnight, PST. The lottery drawing for the Open class will be conducted on October 2, 2017. As in previous years, the event features its traditional 2WD Open and 4WD Open classes along with the combined 2WD/4WD Invitational format.

Drivers who are qualified for the Invitational class will be listed here. As always, only the top 30 qualified drivers will be selected to compete in the ultra-competitive Invitational class; however, all qualified drivers are guaranteed a position in the Open class.

Stay tuned to www.reedyrace.com for more information and event updates. Inquiries regarding the event should be directed to reedyrace@rc10.com

Power your ride with Ty’s choice – LIMITED EDITION

Aug 29 2017


It’s been tweaked by Ty Tessmann himself, to give you the ultimate advantage! Available with or without a T-2090SC tuned exhaust, the limited edition Speed 21XZ-B Spec. II Ty 110% engine is a real difference-maker for buggies and truggies.

If it’s good enough for renowned driver Ty Tessmann, you can be confident installing it in your ride! The Speed 21XZ-B Spec. II Ty 110% long stroke nitro engine continues the O.S. Speed legacy, with improvements that paved the way for Ty to take first place in the Nitro Truggy division at the ROAR Fuel Off-Road National Championships. The engine is available alone, or as part of a set with a T-2090SC exhaust pipe and manifold that offers lots of tuning options for truggy racers. The Speed 21XZ-B Spec. II Ty 110% is being produced in limited quantities.

  • A real difference-maker for buggies and truggies!
  • Features a 7 mm venturi insert that boosts power while reducing fuel consumption
  • The 4 mm lower cooling head lowers overall center of gravity for improved handling
  • A T2090SC exhaust pipe with 90 mm manifold is included with OSMG2036 for consistent low idling and excellent mid-range power


XRAY X12 USA Edition Announced

Aug 25 2017


  • All-new X12 Uni-platform™ design with fully interchangeable parts
  • All-new EU and US Edition both designed & optimized for particular traction conditions
  • All-new EU Edition is optimized for low-, medium-, and high-traction conditions
  • All-new US Edition is optimized for high- and very-high traction conditions
  • All-new chassis concept features a split design of a 14mm shorter chassis + elevated bumper holder to eliminate chassis touching the track surface, minimizing front scrub allowing for increased steering and more consistent handling
  • All-new 2.5mm graphite chassis for EU Edition
  • All-new 2.0mm Swiss 7075 T6 aluminum chassis & rear pod for US Edition
  • Front suspension concept has optimized specs for EU Edition and US Edition
  • All-new stiffer front graphite suspension for US Edition gives increased cornering speed
  • All-new innovative wheelbase adjustment
  • All-new front graphite bumper holder
  • Foam bumper improves the durability of the car and protects the front in hard collisions
  • All-new lower servo mounts with variable mounting depending on battery orientation
  • All-new adjustable-position battery backstops
  • All-new frontward/rearward shock position adjustment for more set-up options
  • All-new track-width adjustment inserts for US Edition
  • All-new tweak-free lower pivot brace
  • All-new lightweight graphite rear axle to significantly reduce the rotating mass and improve steering

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