i ordered a crank and it didnt come with a sprocket so i want to use my old sproket
please help
2007-01-05 09:26:23 · 5 answers · asked by Anonymous in Sports ➔ Cycling
I am assuming that you have a one piece crank.. kinda looks like a "Z", right?
If it is, you just need to take a big wrench and remove the nuts and spacers holding the sprocket, then reverse the process to reinstall.
2007-01-06 01:07:47 · answer #1 · answered by bikeworks 7 · 0⤊ 1⤋
Before you go to all the trouble, make sure that your old crank and new crank have compatible bolt center diameter, as well as the same number of bolts. You can hold a piece of paper over the crank bolts and mark the location with a pen, and then compare it with the other one. If it is not identical, don't even bother; you need to buy a new sprocket (aka Chainring). Otherwise, there is a special tool (or you can use a large flathead screwdriver) to hold the back of the crank bolts. While you are holding the back, take an allen key and attempt to loosen the outside. The back will come off ( they are a male-female configuration) and the chainring will be free!
2007-01-08 11:41:10 · answer #2 · answered by I have wings 2 · 0⤊ 0⤋
The chainring comes off the crank by taking off the chainring bolts. Use an allen wrench one the side facing the pedals and a flathead screwdriver on the backside. Shimano and Campagnolo road chainring spacing (the distance between the holes for the chainring bolts) are different so they wouldn't be compatible. When tightening, try to snug up on the bolts in a star or cross pattern (for 4 or 5 bolt patterns) before you tighten them.
2007-01-05 12:28:47 · answer #3 · answered by Ben P 4 · 1⤊ 0⤋
Hi,
Some sprockets/chainrings cannot be removed from some cranks. That being said, if your setup can be taken apart, you should be able to remove the bolts that hold your chainrings on to your crankarm with a allen wrench on one side, and a smaller flathead screwdriver on the other. Another thing to note is that not all chainrings match up with all crankarms. Good luck on your project. It is not a difficult thing to do if everything all lines up right.
2007-01-05 09:47:39 · answer #4 · answered by rumme 1 · 0⤊ 0⤋
It depends what type of crank you bought. Shimano Ultegra and Dura Ace have a self extracting crankarm bolt.
2007-01-05 13:42:16 · answer #5 · answered by Richard L 1 · 0⤊ 0⤋