Full Option RTR Wraith

Axial offers several optional upgrade parts for the Wraith RTR and Kit. Here’s a quick run down of what is installed and why you may want to use these items.

A shot of the completed Wraith in the studio, Axial offers clear body panels for the Wraith, part number AX04027, to give your rock racer a custom look.

In this shot you can see a handful of upgrades. The first upgrade is aluminum shocks, part number AX30092. Aluminum shocks provide better dampening than the stock plastic shocks, especially when mated with our polyoxymethylene  – (POM/thermoplastic) shock pistons. The aluminum shock body and cap have less flex than plastic versions. Aluminum shock bodies also dissipate heat better than the stock plastic bodies. The shock shafts are oversized (3.5mm) for rigidity. They’re great for high power applications and long run times! We also offer a complete line of various springs to fine tune your suspension as needed – see the complete parts list below for more info.

Another parts upgrade is the front sway bar, part number AX30781. Designed for high speed this system will let you soften up your suspension for jumps, while keeping torque twist and body lean to a minimum during acceleration. A sway bar’s main function is to control body roll, yet still allow your shocks to move vertically with the changing terrain. What does all this mean? It means more stability at high speed. A must have upgrade for any would-be rock racer. Installing sway bars does limit articulation, so this is an option best suited for high speed applications. Great for use with our Vanguard brushless system, part number AX24010 and AX24260.

Moving on to the next part we installed a 25T aluminum servo horn, part number AX30836. Axial’s HD aluminum servo horn provides more responsive steering with less chance of stripping the internal splines over the stock plastic servo horn. Clamping style head for secure mounting in high stress applications. Available in 23, 24 and 25 tooth spline counts.

Axial’s next option part install is the Universal Light Bar, part number AX30709. Axial’s light bar is a great way to add realism and working lights to your Wraith with this universal light bar. Another option part that we plan to install is Axial’s NVS Light System, part number AX24251. The ultimate level in detail you can now add the NVS light system which features controls for headlights, tail lights, brake lights, and right / left turn signals, as well as some extra auxiliary lighting. Great for those night time expeditions. We also offer a 5 string LED light set, part number AX24256, to fit this light bar and it is compatible with Axial’s simple LED kit, part number AX24257, and our NVS System.

Another great upgrade is the Wraith Stage One link kit, part number AX30797. Add even more durability to your Wraith by upgrading your stock plastic RTR suspension links with our HD Stage 1 Aluminum Link Kit. Replaces all the stock plastic suspension links with high quality 7mm diameter aluminum links. These links eliminate axle wrap and unwanted axle steer, especially in high power applications. Axial also offers machined heavy duty aluminum straight links, part number AX30790, to replace the stock plastic lower links as an alternative the the Stage One link kit.

Axial’s HD motor plate, part number AX30860. Our heavy duty motor plate is for any vehicle running our AX10 transmission. CNC machined from 4.5mm thick billet aluminum, with integrated heatsink fins to help motors run cooler on those all day expeditions. A must have for any R/C overland adventurist! Axial also offers 13T, 14T and 15T steel pinion gears and an 87T spur gear to give end users an array of gear ratios to choose from. Add more torque for low speed crawling to your Wraith by installing one of Axial’s optional brushed motors available in 27T and 55T configurations. Another option part that we installed here is Axial’s dig system for the Wraith transmission, part number AX30793. Axial’s dig system allows you to lock the rear wheels, while powering the front wheels only for a tighter turning radius. Shift servo sold separately.

Axial’s HD differential covers, part number AX30829. HD diff covers protect ring and pinion gears from being damaged by rocks, just like their 1:1 counterparts, all while adding a little bling to your ride.

Another option part that is usually hiding behind the HD cover is Axial’s HD ring and pinion gears, part number AX30395. HD ring and pinion gears are more efficient than the stock aluminum ring and pinions. CNC machined for precision, hardened steel for durability – great for high power applications. Axial also offers hardened steel overdrive ring and pinion gear sets, part number AX30401, for a little extra wheel speed. We also offer an underdrive ring and pinion gear set, part number AX30402, for a little more torque in binds.

Axial’s HD lower link mounts are another noteworthy upgrade, part number AX30830. Our HD lower link mounts allow users to fine tune ride height and wheelbase by providing more adjustment holes than the stock plastic units.

This shot also shows a few options parts. First option is aluminum knuckles, part number AX30760. Aluminum knuckles provide more responsive steering and helps vehicle track better at speeds and in the rocks. Another option shown is the Axial Aluminum C-hubs, part number AX30762. Aluminum C-hubs also help your vehicle track more consistently in all situations, especailly when used in conjunction with our aluminum knuckles. Also notice the AR60 universal axles, part number AX30780. Axial universal joint axles increase steering angle to 50 degrees, that’s 60% over the stock dogbone/drive cup setup. These universals provide smoother action for a higher performing, efficient drivetrain. The universal is oversized; typical for 1/8 scale vehicles and made of hardened steel so it’s capable of handling extreme power.

Next option is the rear sway bar, part number AX30782. Designed for high speed this system will let you soften up your suspension for jumps, while keeping torque twist and body lean to a minimum during acceleration. A sway bar’s main function is to control body roll, yet still allow your shocks to move vertically with the changing terrain. What does all this mean? It means more stability at high speed. A must have upgrade for any would be rock racer. Installing sway bars does limit articulation, so this is an option best suited for high speed applications. Great for use with our Vanguard brushless system, part number AX24010 and AX24260.

Aluminum axle lockouts are another great upgrade, part number AX30789. Axial’s aluminum axle lockouts are more rigid than the stock plastic lockouts, which will allow the vehicle to track better in all situations.

For wheels, we went with our VWS beadlocks, part number AX08061. VWS wheels allow users to tune foam set-ups and change tires at will for varying terrain and conditions. Another wheel option offered by Axial is our black 8 hole beadlock wheels, part number AX8097. These wheels offer a little wider overall stance which equals stability at high speeds. For low speed rock crawling you can increase your Wraith’s climbing abilities by adding Axial’s 2.2 Internal Weight Rings, part number AX30545. Add even more weight by utilizing Axial’s 2.2 Internal Wheel Weights for the Internal Wheel Weight Rings, part number AX30546.

You can see our R35 Ripsaw tires pictured here, part number AX12015. R35 Ripsaw tires offer both a realistic look for the image-conscious scale crawler and for those looking to up their performance game. This 2.2 Ripsaw offers an aggressive tread design, greater ground clearance, and is made from a R35 sticky compound. The VWS wheels include black aluminum rings, but I swapped those out for our Grey beadlock rings, part number AX08133, just to match the grey colored suspension links.

Complete Wraith option parts list:
AX8097 – 2.2 Black 8 Hole Beadlock Wheels (x2)
AX08061 – 2.2 VWS Beadlock Wheels (x2)
AX08133 – Grey VWS Beadlock Rings (x2)
AX12015 – 2.2 R35 Ripsaw Tires (x2)
AX30545 – 2.2 Internal Wheel Weight Rings (x2)
AX30546 – 2.2 Wheel Weight Inserts (x2)
AX30797 – Stage One Link Kit
AX30790 – Machined Heavy Duty Aluminum Straight Link 101mm (x2)
AX30469 – Machined Heavy Duty Aluminum High Clearance Upper Links (x2)
AX80057 – XR10 Linkage Set (x4 for all 8 links)
AX30395 – HD Ring and Pinion Gear Sets (x2)
AX30401 – Overdrive HD Ring and Pinion Gear Sets (x2)
AX30402 – Underdrive HD Ring and Pinion Gear Sets (x2)
AX30571 – 13t Steel Pinion Gear
AX30569 – 14t Steel Pinion Gear
AX30573 – 15t Steel Pinion Gear
AX30672 – 87t Spur Gear
AX30829 – HD Differential Covers (x2)
AX30860 – HD Motor Plate
AX30830 – HD Link Mounts (x2)
AX30834 – 23t HD Servo Horn
AX30835 – 24t HD Servo Horn
AX30836 – 25t HD Servo Horn
AX30762 – Aluminum Axle C-hub’s
AX30760 – Aluminum Knuckles
AX30789 – Aluminum Axle Lockouts
AX30092 – Aluminum Shocks (x2)
AX30780 – AR60 Universal Axle Set
AX30781 – Front Sway Bar
AX30782 – Rear Sway Bar
AX30709 – Universal Light Bar
AX24256 – 5 LED Light String
AX24257 – Simple LED Kit
AX24251 – NVS Light System
AX24010 – Vanguard Brushless Motor
AX24260 – AE-3 Vanguard ESC
AX24007 – 55 Turn Motor
AX24004 – 27 Turn Motor
AX30793 – Dig Component Set
AX04027 – Wraith Clear Body Panel Kit
AX30223 – Black Springs 1.04 lbs/in (x2)
AX30224 – Purple Springs 1.43 lbs/in (x2)
AX30225 – Orange Springs 1.75 lbs/in (x2)
AX30218 – Red Springs 2.07 lbs/in (x2)
AX30219 – White Springs 2.47 lbs/in (x2)
AX30220 – Green Springs 2.85 lbs/in (x2)
AX30221 – Yellow Springs 3.27 lbs/in (x2)
AX30222 – Blue Springs 3.55 lbs/in (x2)

Brandon’s Formula Offroad Build: Part 3: Insight into the AR60 Axle Design

See Part 2 of the build HERE.
See Part 1 of the build HERE.

Wanted to share the latest updates to my Formula Offroad build. When I first built this rig using AX10 axles the Wraith™ had just hit the market. At the time I thought it would be great to have those new AR60 axles found in the Wraith™ underneath my Formula Offroad rig. Well its been long enough, time to get it done!

But first, I will explain a few of the advantages of the AR60 axles for this application.

Axial R&D developed the new AR60 axles for a few reason’s. First, we wanted the Wraith™ to perform well at higher speeds. Speed isn’t all about straight line performance, stability is important as well. The AX10 axles with some wideners would not have cut it. To increase handling ability at speeds we needed to utilize a design with proper scrub radius. So what is Scrub radius and why is it so important for handling? Scrub Radius is determined by the kingpin location on the steering knuckles and hubs. Draw an imaginary line to the ground through the kingpin screws and ideally that imaginary line lands close to the center of the tire to achieve the ideal scrub radius.

Ideal, or zero scrub radius occurs when the kingpin line meets the ground at the center of the tire.

Here is a pic I found to help explain Scrub Radius (aka pivot angle radius):

Now lets take a look at the AR60 axle by drawing a similar diagram.

The Blue line is the imaginary line I mentioned above. The screws this imaginary line travels through are the kingpin screws. The red “X” at the bottom of the tire is the location that the kingpin line meets the ground. You can see this very close to the center of the tire therefore the scrub radius is minimal.

On 1:1 cars you want this scrub radius to be as close to zero as possible. Vehicles with a large scrub radius require powerful steering systems to move the tire when steering. Cars with zero scrub radius can usually be driven without power steering. So this brings us to another important reason to reduce scrub radius. The larger the scrub radius the higher the torque required to steer it, therefore you need a stronger steering servo on your RC car. Keeping the scrub radius to a minimum will let your steering servo work at its full potential and use the steering torque efficiently.

Lets look at my old setup using the AX10 axles and a wide offset wheel to achieve the width I wanted. Keep in mind that this is extreme due to the wheels I was using. Axial’s current products that utilize the AX10 axle do not exhibit this large scrub radius.

Here you can see the distance from the center of the tire where it meets the ground is a good distance away from the red X. This creates a very large scrub radius.

There are few other important things to note when looking at the comparisons above. See how the imaginary line through the kingpin screws is at an incline on the AR60 axle? This is due to the inclined kingpin screws compared to the vertical kingpin screws on the AX10 axles. This inclined kingpin design was originally used on the XR10 competition Rock Crawler. It effectively moves the imaginary line closer to the center of the tire. The extra width of the AR60 axle and the incline kingpin angle both work together to increase handling, stability, and steering efficiency.

When Axial R&D started looking into Kingpin Inclination during the design of the XR10 competition Rock Crawler we found that the 1:1 automotive industry settled on an inclined kingpin angle of 7-9 degrees. Anything more and the contact patch of the tire is decreased during steering. The XR10 and AR60 axles utilize 8 degrees of kingpin inclination.

Another example of kingpin inclination can be seen on a Dana 44 Axle, its always cool to see real world 1:1 technology trickle down into the RC industry.

The second major design focus on the AR60 axles was strength. The Wraith™ was designed to handle more more speed and larger tires than any previous Axial product. The AR60 axle utilizes a 1 piece molded axle housing with thicker axle tubes. By removing the seam of the 2 piece axle housing and increasing the thickness the strength increase is substantial.

The third major design focus of the AR60 axle was adjustability. Some key adjustable features include:

  • The AR60 axle can easily be flipped for a left or right offset pumpkin. The offset pumpkin allows for more clearance under a larger area of the axle and properly aligns the axle output with the transmission output to create a more efficient drivetrain.
  • The lower link/shock mounts can be flipped to adjust height and anti-squat.
  • Remove the diff cover and you can access the ring and pinion. Again this can also be flipped to keep the same rotation when you flip the axle housing to change the offset of the pumpkin.
  • Caster angle can be changed in 18* increments to drastically change driving/handling characteristics.
  • Upper 4 link truss is designed to be modular and act as a true truss to stiffen the axle housing.

Here is a exploded view showing the removal of the ring gear. Again Axial R&D took inspiration from 1:1 axles and the accessibility of the ring & pinion. It never gets old having to tear into an AR60 axle, its just too cool the way it comes apart and the diff cover gives you access to the axle internals.

Flipping the axles is also very easy. For this part of my Formula Offroad build I opted to install them flipped when compared to the Wraith. This was done to keep the transmission in the same orientation. If the AR60 axles did not have the capability to easily be flipped I would have been forced to rethink my whole build. The current transmission position allows me to run a full size 2 or 3S lipo pack under the hood. Once the axles were flipped all I had to do was flip the differentials inside the axle to correct the rotation. This extra adjustment is a great feature for changing the rotation to accommodate electronics or fighting torque twist.

Along with flipping the axles, the lower link/shock mounts can be flipped to further fine tune the suspension. Anti-squat characteristics are determined by the location of the links at the chassis and the axle. Triangulation and link separation is key when setting up a 4 link suspension, the AR60 axles give you that extra adjustability needed with the lower link mounts. Take a look at the image below, the green line running through the center of the axle helps to show the difference when the link mounts are flipped (link mounts shown in blue). If you need to replace a lower link mount its an easy part to change out that does not require the entire AR60 axle housing to be replaced. Axial also sells a machined aluminum lower link mount AX30830.

Here are a few initial build pictures of the AR60 axles underneath my Formula Offroad rig. Because this is a custom build I did have to make some slight adjustments to bolt on the AR60 axles and still utilize the full stroke of the shocks without interfering. I will update this post with some more detailed photos soon.

I also opted to upgrade the driveshafts to the new AX30794 WB8 versions. The new WB8 driveshafts utilize a CV style joint that is rebuild-able.

The wheels are the new Axial 2.2/3.0 Narrow Raceline Renegade for the EXO Terra Buggy. Tires are Pro-Line SC Slingshots.

More build pics coming soon! Also need to get some electronics sorted out. Stay tuned, thanks for looking!

Not sure what Formula Offroad RC’s are all about? Check out the RCCrawler.com Formula Offroad Forum HERE

Want to see a FOFF RC in action? Check out Bender’s video HERE