Today we’re excited to release the all-new Pro Series Knuckle. Heat treated legs. Tig welded. Integrated double shear high steer arm. The best off-road knuckle just got better. Head over to http://www.spidertrax.com/products/Pro-Series-Knuckles for more details.

Here’s a simple addition to our Spider 9 brake product line that will mean a lot to a number of Ultra4 racers. For over a decade, we’ve been successfully running 14″ diameter rotors. Solid rotors at first, followed by vented rotors as of recent. These larger diameter rotors work amazing for rock racing, providing excellent braking power at high speeds (racing) along with ultimate stopping power at low speeds (crawling). With small exception — caliper to wheel clearance is tight, and on some newer Ultra4 builds (IFS specifically comes to mind) it becomes a bit too tight. Enter the GT-36 Series 13.5″ Vented Rotor.

This rotor starts life out as a 14 in. Wilwood GT-36 Vented Rotor, and then finds its way into our machine shop. We take down the outside diameter to 13.5″, chamfer both sides for a clean factory finish, hold less than .005″ position tolerance between the finished OD and brake hat mounting holes, all while maintaining full caliper pad contact. In the end, it’s a simple solution for those that need just a bit more caliper to wheel clearance. Rotors and caliper brackets are in-stock and ready to ship — http://www.spidertrax.com/GT-13.5-in.-Vented-Rotor .

There’s no shortage of fun watching Ultra4 racing grow, and pushing the boundaries of what is possible at each and every race is standard practice these days. On the constant quest of getting everything you can out of the tight space of a race vehicle, we are excited to release our IFS 4130 Narrow Width Housing. With a modified Gearworks HP 10″ third member (sold separately), we are able to tighten up the CV flange to CV flange by 1.4″. For the right builds, this allows those mid-shafts to be longer and the suspension & steering to travel more. Available today at http://www.spidertrax.com/IFS-4130-Narrow-Width-Housing .

Big brakes have been a big deal in rock crawling and rock racing. We’ve been manufacturing 14″ diameter rotors since the early rock crawling days, and the extra stopping power at lower speeds has become an easy must-have. That being said, in today’s Ultra4 vehicles, especially those newer IFS powered versions, the large 14″ diameter rotor is a bit tight. Factor in mud and debris from those east cost races and clearance between the caliper and wheel can be an issue.

As such, the need for a slightly smaller rotor is born. Enter our prototype 13.5″ diameter rotor, which starts as Wilwood GT-36 Vented Rotor, precision machined down from 14″ to 13.5″. Brake hats, calipers, and pads all work as-is. The caliper pad also has full rotor contact, so no compromises either.

We’re giving these a test now, and so far so good; the extra caliper clearance for those that need it is obvious and welcome, and this rotor should do the trick. Stay tuned for more details.

As drivers continue to push the boundaries of what’s possible, our Spider 9 products evolve to push those boundaries even further. We’re proud to release our latest Ultimate Knuckle, designed ground up to surpass the strength of our previous generation Pro Series Knuckle. Complete with 7/8″ spherical bearings, internal gussets, interlocking steering arm, and industry leading 50 degrees of steering, there are simply no shortcuts here. Take rock crawling and rock racing to new levels with the Spidertrax Ultimate Knuckle, now available on the Spidertrax Store.