I have SRAM Rival on my new Cross bike. The rear shifter seems to have jammed and won't let me shift up.
There was a lot of dirt in the shifter after last week's very muddy race, but I have flushed it out with a hose, and lubed the parts as best as I can.
Any advice on how these things work? I'd like to be able to fix it myself so if it happens on the road, I can deal with it.