Kyosho UM129 4.8mm Short Ball Stud (4)

Kyosho UM129 is a four-pack of genuine 4.8mm short ball studs for Kyosho's 1/10 competition off-road platforms. These steel studs thread into suspension and steering components to create the pivot points for camber links and tie rods, letting the ball cups articulate smoothly through the full range of suspension travel. The short-neck design sits the linkage closer to the mounting surface for the geometry Kyosho specifies at several locations on these chassis.

They are direct factory replacements for bent, worn, or stripped studs. Worn balls create slop in the links, so fresh studs tighten up steering response and keep camber settings consistent lap after lap. Fitment covers the Ultima RB5, RB6, RB7, RT5, RT6, SC, and SC6 series buggies and trucks along with the Lazer ZX-5, ZX6, and ZX7 4WD buggies. Package includes four 4.8mm short ball studs, enough to service both rear camber links with spares left over.