The GPM XME891R20GNG is supplied as a matched pair of rear rubber radial tyres engineered for the XMods Evo platform. The 20 degree compound is selected to provide consistent grip characteristics under braking and acceleration while offering predictable wear. Tyre profile and bead-seat geometry are specified for XM and XME fitment to ensure correct mounting on GPM ridgeless rims, supporting repeatable handling for setup work and lap time analysis.