Chainwhip+extension bar that is bigger than the radius of the wheel will give you more leverage. Rotafixing can also reduce the life of/damage a chain. It's a useful trick but chainwhip every time where possible IMO. And Even without an extension bar, I've never had any trouble getting a cog on/off with a decent chainwhip as it is.
Chainwhip+extension bar that is bigger than the radius of the wheel will give you more leverage. Rotafixing can also reduce the life of/damage a chain. It's a useful trick but chainwhip every time where possible IMO. And Even without an extension bar, I've never had any trouble getting a cog on/off with a decent chainwhip as it is.