Spidertrax Pro Series 60 Knuckles (4") axle Battery Terminals:Top

Battery Terminals:Top

the Spidertrax Ultimate Unit Bearing is the perfect fit for an Ultra4 solid or IFS axle

each knuckle can withstand over 21

Using the included set screw

we perform a deep freeze

Spidertrax Pro Series 60 Knuckles (4") axle Battery Terminals:TopLight as always. Stronger than ever. Spidertrax introduced their first fabricated knuckle over 5 years ago. Today, the Pro Series 60 Knuckle takes professional rock racers to an all new level. Better materials, bigger bearings, & larger bolts make this the strongest knuckle yet. All while holding the same compact & lightweight design philosophy you have come to expect. This Pro Series Knuckle is designed to install on a Spider 9 Housings w 4" OD