Panaracer GravelKing SK Tire 650b x 48mm 120TPI Tubeless Black model s workscrux The SRAM GX Eagle rear The SRAM GX Eagle rear derailleur takes the tech from its big brothers and puts it in a more accessible package The tightly spaced gearing comes with the added advantage that the first nine cogs – from the 11 to the 21 – are machined from a single block of high grade steel minimizes rolling resistance Actual width of installed tire can vary by 6mm or more depending on inner rim width and inflation pressure ZSG (Zero Slip Grip) natural rubber compound provides consistent performance through a wide range of temperatures and wears well Bead to bead puncture protection belt 126tpi Advanced Extra Alpha casing performs well through a wide psi range