Cold-forged 6061 aluminium crank arms mean that the Gossamer Tandem crankset has the strength and reliability that tandem riders look for. A spacer system allows the chainline to be adjusted over a 10mm range, allowing the timing chain to be perfectly aligned. The rear chainset has a wide-range 52/39/30 triple configuation on the drive-side and a 42T ring opposite for the crossover drive. Both front and rear chainsets are available with a choice of arm lengths, and you can choose different lengths for front and rear. Laser-etched graphics provide a distinctive finishing touch.