SMJ high traction hex wheel shims
SMJ have introduced these high traction hex wheel shims for onroad touring car. At 0.5mm in thickness they are placed between the wheel and the hex and come in 2 versions. The soft version is a slightly flexible material which helps generate grip in low traction conditions. The medium version helps to slightly soften the car’s reactions making the car easier to drive and more stable. The shims are the same shape as the hex which helps improve the mounting accuracy. Sold in sets of 4 pieces.
Source: SMJ [smj-rc.com]