[Sudsy]

Hi,

I am the proud owner of a 2005 epic comp. Actually it was a comp till my frame cracked and they upspeced me to a pro frame. So lets say a pro with comp components.

Anyway....after the switch my bike suddenly skips gears when going over bumps etc. I will be going along in a good rythm and bump skip and my feet are now doing double time and you can hear the ratcheting of the gears. I took it to the LBS 2 times and they say it is fine. I say no it aint!

Has anyone any suggestions as to what to look for or to replace or repair?

Thanks!

 

[chrisp86]

Common problem for Specialized full suspension bikes. You must make sure that the cable housing for the rear der. is just the right length going below the bottom bracket area. If the cable housing is too short it will stretch when the rear shock compresses and your rear der will shift because of that movement.

Your shop probably replaced the cable housing and cut that housing too short on your replacement frame... my reccomendation; take it back to the shop, and tell them to put a longer piece of rear der shift housing below the BB.

-Chris

 

[pimpbot]

Ghost shifting

Yep, I second that. Full Suspension frames are prone to ghost shifting, if the cables were run improperly, or the derailleur cable is adjusted too tightly.

What is happening, is that as the suspension moves, it beds the derailleur cable slightly, making the cable pull, and making it want to downshift to the next larger cog (for regular rise derailleurs). The larger cog grabs the chain for an instant, then lets it go, causing the skipping. I had this happen on my bike a bit until I ironed it out.

A quick and dirty thing to try: Try loosening the deraileur cable adjuster barrel one or two notches and see if the problem goes away. If it doesn't, turn it back and claim nothing!

 

[MrEconomics]

A quick and dirty thing to try: Try loosening the deraileur cable adjuster barrel one or two notches and see if the problem goes away. If it doesn't, turn it back and claim nothing!

this is usually a good fix if the cable is only a fraction short. i would still go back to lbs since they messed up so you will get anothr new cable.expect new cables to have normal stretch so barrel adjusments will need to be made. a good lbs will stretch the cables prior but sounds like your lbs doesnt really understand fs bikes

 

[Sudsy]

Cheers!

Thanks for the answers,

You know I took some of the replies and other info to the shop and the mechanic reads it and said......." huh...that makes sense" I told them there was no charge for the time I spent figuring out the problem.

So lets hope that sorts things out.

Thank youb all so much for the info. There is a lot of great knowledge around if you know where to look for it.

Now I am looking for a good deal on tires. Any thoughts?

 

[derfernerf]

maxxis all the way

 

[chrisp86]

Thanks for the answers,
Now I am looking for a good deal on tires. Any thoughts?

I've been happy with Michelin tires. Their XC race tires are nice and light. I run the Michelin 'XC Dry' on my XC bike with Stans-no-tubes.