STOER Bikes S1+ Oranje Delivery:Assembled the extension seatpost is easy Size:Large (58 62 cm) the extension seatpost is easy to install and fits perfectly with ENGWE models wat de wielen laat draaien This Stoer Bike is equipped with a powerful 250w Bafang motor with 2 speeds that provides support up to 25 km h even on rough and muddy terrain