Newbie here...changing rear wheel on 21 speed bike?
I have a 21 speed EZ Fire shifter bike. When you need to remove the rear wheel to fix a flat should the gears be in a certain position when re-installing the rear wheel...i.e. should they be in the lowest or highest gear range or it doesn't make a difference?
The chain on the highest gear (smallest sprocket) gives you more slack in the chain to coax the wheel in and out.
If you want to fool around with your cables, put the chain in the lowest gear (largest sprocket) and then click the shifter to the highest gear (without rotating the wheel to cause the chain to drop down). That will create a lot of slack in your cable.