Trek revamps Madone with discs, top-tube IsoSpeed New adjustable-IsoSpeed aero bikes with wild paint options Share on Facebook Share on Twitter Share on Pinterest Share on Whatsapp Share on Reddit Email to a friend By Ben Delaney Published: July 6, 2018 at 4:00 pm The new Madone SLR has an adjustable IsoSpeed under the top tube with an elastomer damper in the seat tube Trek Bicycles