FarEast
Maximum Pace
- May 25, 2009
- 5,528
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Charles--I have one worn rear cog that I could feel the roughness in my feet, maybe two actually.
Should I go ahead and replace the whole cassette, or just the cogs? (prolly would do all of them)
Also, what would indicate chainrings need replacing?
(bike's 6th season coming up, I replace chains yearly, pulleys & BB were done along with a full overhaul last winter. I do about 5-6k km/yr)
John D.
Never heard them called "Jockey Wheels" before
Never heard them called "Jockey Wheels" before :
Good point!
Never heard them called anything else.
Maybe its a British thing?
What do you call them?
I think they are often refered to as "pulley wheels" by muggles (Thank you Owen, love that term although they are refered to Fred's in the trade !)
But as they do not change the direction of applied force or allow for mechanical power or torque the term is incorrect, there purpose is to guide the chain over and across to the new sprocket, thus why they are called Jockey wheels.
Sheldon Brown said:A typical derailer consists of a parallelogram which moves a cage. In the case of a rear derailer, the cage has two chain pulleys, a jockey pulley and a tension pulley. Different derailers have different capacities to handle different gear ranges.
Might want to check the definition of what a jockey wheel is
"A free-turning, spring-loaded idler wheel used to keep tension on a belt or chain"