With the small chainring with BCD 74mm, every climb is no longer a nightmare. Our latest spider is based on the double spider and has additional M8 threaded holes for the small chainring with a bolt circle of 74mm. This spider fits our ST and OR cranks. Made in EU from high-strength 7075T6 aluminum. The scope of delivery includes spacers and 17mm  Titanium chainring bolts for the small chainring.