Kartboy Tarmac Shift Knob Top

This is a replacement or add-on topper for Kartboy’s StackLock shift knob platform. The Tarmac is the ball-shaped topper. It threads onto a StackLock core and can be swapped with any other Tarmac or Gravel topper.

It is available in three materials:

• White or black Delrin: an acetal plastic that stays cooler in summer and warmer in winter than a metal knob.
• Brushed stainless steel: the heaviest topper in the StackLock lineup. Assembled on a stainless core, the knob weighs 522 g (1.15 lb).

The topper requires a StackLock core, which is sold separately and included in every StackLock Shift Knob Kit. Hold the core with a standard 1/2" drive tool through its internal drive while threading the topper on or off. No special tools are needed.

Specifications

• Shape: Tarmac (ball)
• Diameter: 49.75 mm (1.96")
• Materials: White Delrin, black Delrin, brushed stainless steel