Support us! Bikerumor may earn a small commission from affiliate links in this article. Learn More Esker Cycles has a sweet new rigid steel, singlespeed-friendly bike for the discerning mountain biker looking to blend classic klunker looks with modern trail-ready geometry, plus all the good new standards. But it is seriously limited, so if this looks like your kind of ride you should probably put your chips on the table fast before they are gone.