I wonder if anyone would be able to offer me some advice on an issue I'm having. While riding I am able to upshift just fine during any situation, but often the downshift will not 'take' unless I am pedaling very slowly. As a work-around I usually have to either shift down twice, or hold the grip shifter down toward the lower gear, but not actually shift. For example:
Say I am in 5th gear and want to shift to 4th.
I move the grip shift to 4, but the gear does not change.
I can either shift again to 3, which would then take 4th gear, or
I can move the shifter slightly below 4th gear (but not to the point where it clicks to 3) until I feel the shift take place.
I am a total novice when it comes to bike mechanics. I've never done anything more complex then changing a tire, but I am looking for some assistance here. My bike is a Giant Cypress DX, 2007 with a grip shifting system.