The caveworks branded saddle allows for approximately (+/-) 3mm of adjustment. Should you choose to spec your own saddle, this amount may vary as different saddles may have different lengths of rail in their adjustment range. The RIVET is spec’d with a 30.9mm seatpost with a 20mm offset, so additional setback (+/-) can be achieved with low additional investment in an aftermarket seatpost appropriate to a rider’s needs.