The 2013 rumors where right that Avid is working on a XO brake with 4 pistons:
Vitalmtb has pictures of it thanks to mtb-news.de
More details follow in March
http://www.bicycling.co.za/slideshows/2013-mountain-bike-gear-news-and-rumours?page=2weve confirmed that X0 brakes are receiving a major rework. One of the biggest changes will be a four-piston trail brake option.
Vitalmtb has pictures of it thanks to mtb-news.de
More details follow in March