Tamiya 53129 - F1 Rear HBR Soft Sponge (2) OP-129  [53129]

They're soft backside foam tires the Tamiya F-1 show cars.

Features:

• Soft substance (high traction)
• Pre-trued
• Ready for mounting

Includes:

• (2) backside tires
• (4) pieces of dual back tape for mounting
• Guidelines (for the removal of old tires and installing brand new)

Specs:

• Outer diameter - 55mm
• Inner diameter - 35mm
• Width - 40mm .

Optional: Highly recommend tire glue as opposed to dual sided tape.