et al,
I manufacture a spider that bolts onto a SRAM crank that allows for sub compact chainrings and corrects chainline for a 142x12 or 135x10 rear wheel. It is a 110/74BCD and uses Sugino chainrings. It will bolt onto any 3 bolt SRAM crank.
Originally I was only making them for my bicycles but I have recently stepped up my manufacturing abilities and will be selling them as a stand alone part. If you are interested feel free to message me or send me an email.
James Huang did a nice spread on one of the bicycles I made with the spider and he has some good photos included. Here is the link:
https://cyclingtips.com/2018/10/phil...lery-part-one/
Thanks for reading,
Drew