can any one help
I recently bought a claud butler alpina 2.7 2015 through cycle to work scheme, I had problems with brakes and gear slipping , the brakes I upgraded at a cost as they were not stopping me very well . upgrade from clarks exo skeletal to shimano deore , but I was charged a little fee, but im still having gears slip all time- when I take it back they tighten cable and it happens again. they said my deraileaur arm was bent straighted it up but still doing it- Im not doing any extreme riding just mainly flat trails for fitness so im not throwing bike around and I am carefull when I put bike away , any one got any thoughts
You need to repost this on the Mountain Bike section of this forum, this particular post is discussing helmets and not anything else. But to save you some time I will do my best to help you.
You may something as simple as the factory, or if the cable was replaced after it was new, failed to pre compress the housing after the wire was installed through it; there is a cable stretching tool that mechanics use just for this purpose, once the cable is pre stretched then this nonsense you may be experiencing might stop but might not either if something else is causing the problem. At this point I would probably have new cables installed but if you do that take the bike to a different bike shop because the one you're taking it to seems ignorant on how to fix something as simple as the problem you have.
If the derailleur was bent the mechanic may not have either bent the derailleur back correctly OR your derailleur hanger is bent or the dropout (where the wheel slips into a slot on each side) where the derailleur is fastened to if there is no hanger is bent. Either way if that is the issue the mechanic failed to check and do it properly which means find another mechanic.
Or if the derailleur was hit and the hanger was bent it's possible that the derailleur may have been damaged and is binding when being used.
Or perhaps the nut that holds the wire tight at the derailleur is somehow not able to tighten properly and clamp the cable securely might be allowing the cable to slowly slip.
Beyond the above stuff you could have a worn out chain and or rear gear cluster which I doubt the gear cluster would be worn out at this early stage of your bikes life but it could be. Speaking of gear cluster it's also possible that the cassette lockring is loose and needs to be tightened.
Once that has all been resolved the last issue would be the shifter itself.
There may be other things I might have missed that someone else may suggest.
If you haven't gotten my point yet, FIND ANOTHER BIKE SHOP!!!