Does anyone know any bike mechanics in sussex area near Hickstead?

[Sellyb]

I only bought the bike a few weeks ago, and the chanin mech definitely needs adjusting, but I don't know enough to do it myself. The mechanics are meant to have checked it, but it's rubbing against the derailleur from the when it hits the 4th sprocket against the small front one. If anyone knows someone, this would be appreciated. I don't have the right car to transport it, so it needs to be local.
Thanks

 

[betty swollocks]

Extreme cross overs of the chain should be avoided ie big front to bigger rear and small front to smaller rear, because it wears the chain fast, it impairs transmission efficiency and there is a chance that the chain will rub on the inner or outer plates of the front derailleur.
Lots of videos on youtube how to do various tweaks: here's one.......really worthwhile learning how to do this sort of stuff for yourself:-

 

[Cubist]

Sellyb does the bike have three chainrings and 8/9or10 at the back? If so you are describing chain-rub caused by cross-chaining.

Let me explain. On a triple it's possible to adjust the front mech to allow the chain to pass through the cage when the chain is on the middle ring, and it can be on any of the cogs (sprockets) on the rear cassette. If however the chain is shifted onto the inner (granny) ring, it only works best on the four or so biggest sprockets. If you shift onto the smallest sprockets the chain "crosses" from near the frame at the front, to away from the frame at the back, and as a result the chain cannot clear the outer plate of the cage and so it rubs.

In your case it sounds like the new cables have stretched through use (they've bedded in if you like) and so the slacker cable no longer holds the front mech so far to the left. This now means that the chain rubs more.

If you bought the bike from a LBS, take it back and ask for your first service. This sort of initial cable adjustment is standard on all new bikes( mine needs doing as well). Otherwise it's the sort of task that if you're brave, you can do yourself.

Look at the front shifter where the cable comes out and you'll see a barrel adjuster:

Shift into the inner ring so that the cable is at its slackest, and simply turn the adjuster as if you are unscrewing it from the shifter, anticlockwise, so that more thread is visible. This puts a bit more tension in the cable. You can feel the cable where it runs to the front mech, and you'll be able to feel it tightening as you turn the adjuster a quarter turn at a time. Aim to take all the slack out of it so that it's taut but not "tight" .

Give that a try and see if it improves things.

 

[lpretro1]

Try this mobile outfit:- http://www.slickdog.co.uk/Bicycle servicing prices.htm

 

[Sellyb]

Thank you guys, you have put so much effort into this. I will have a go. Selena.

 

[Paul.G.]

I only bought the bike a few weeks ago, and the chanin mech definitely needs adjusting, but I don't know enough to do it myself. The mechanics are meant to have checked it, but it's rubbing against the derailleur from the when it hits the 4th sprocket against the small front one. If anyone knows someone, this would be appreciated. I don't have the right car to transport it, so it needs to be local.
Thanks

I know this might sound over the top but as with most things in life, if you can do it yourself you will not only save you a fortune but you will achive an element of self sattisfaction on a "job well done" From personal experience I strongly suggest you look at the ads in cycling weekly (or similar) and if you can afford the cost of the course and a to use up some of your annual holidays, a few days on a bicyle maintenance course is worth it weight in gold. You will be amazed at what you can do for yourself after the initial training and with minimal ivestment in tools. Once you have the basic skills you away.

Just a thought

Paul