I have been riding my Kona Rove LTD from 2018 with Sram Force 1x11 mechanical for about two hours today without issues. I have afterwards left my bike in the garage slightly tilted to right side (against the wall). After I returned to garage, I have noticed significant oil spill on the floor and on the front rim. There was no oil on the brake disc, and no oil anywhere on the bike that I could find. It was significant amount of oil, perhaps 20-30ml. Front brake is working normally.
Has anybody similar experience? Should I remove bar tape and search for leak, or is it a problem with the lever - it is 8 years old, so I wonder should I upgrade to a newer groupset, perhaps 1x12. My groupset worked ok prior to this.
Many thanks in advance!