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Rear shifting problem(6 posts)

Rear shifting problemnodima
Jun 10, 2002 11:23 AM
I noticed that the rear shifting on my wife's bike is not working properly.

I tried adjusting the cable, the hi/lo limit screws, and checked to see if the chain skips cogs etc. I left it so that she cannot shift into her smallest rear cog, it shifts perfectly into all other gears.

I finally realized that the shifter (Tiagra) is only giving 7 clicks rather than the 8 it should (9sp). The bike only has 1000 or so miles on it. Anyone seen this before?

thanks

nodima
Yup, happens all the time.the dad
Jun 10, 2002 11:51 AM
my best possible advice would be to return it to the dealer. A free tune up after a couple of hundred miles is one of the best services offered by bike shops that all too few people take advantage of.
Sure it's not just too tight?TFerguson
Jun 10, 2002 12:51 PM
If you adjust the cable so that it hits the stop after only 7 clicks, that's all you will get. Try disconnecting the cable and just providing tension on it by pulling with your hand. Still only 7 clicks?
two thingsfeathers mcgraw
Jun 10, 2002 3:52 PM
Like TFerguson said, you may have simply tightened the cable too far, so that the second cog is the first, and the limit stop prevents you from getting the last click on the shifter. Release the cable, click the shifter lots of times to make sure it's in the slackest position, reattach, and increase tension 'til it shifts correctly. The other possibility (rare) is if a dopey mechanic attached the cable to the wrong side of the fixing bolt. Make sure the cable is attached below the bolt or it'll pull the derailer too far, eventually running out of room before you can get the last click in.
re: Rear shifting problemCharlie - Empire Cycle Craft
Jun 12, 2002 8:00 PM
Your first mistake was touching the limit screws. These have NOTHING to do with your quality of shifting. All they do is LIMIT how far in and out your der. can swing. Your first step is to loosen the cable from the der. and adjust the HI limit screw so that the top pulley of you der. lines up with the bottom cog. Now, turn the barrel adjuster all the way in and attach your cable. Make ONE click on your shifter. If the chain does not move to the second cog then turn the barrel adjuster out until it does. (obviously, you will have to have some sort of stand so that you can turn the pedals) Next, shift your chain into the largest cog and use the low adjuster screw to line the top pulley of the der. with the largest cog. At this point you have covered the basics. Now, start shifting the chain up and down the cogset. If your bike shifts up quickly but down slowly than turn the barrel adjuster in to decrease the cable tension. If it shifts up slowly and down quickly then increase cable tension by turning the barrel adjuster out. Repeat until shifting improves. Hope this helps.

Charlie Weisel
www.empirebicycles.com
re: Rear shifting problem--Problem Solvednodima
Jun 13, 2002 4:01 AM
Thanks to all for the helpful replies. Turns out the cable was a touch too tight.

nodima