Mountain Biking - BB and Front mech Combos

I tried fitting my Front mech today... its the first real bit of work ive done to the bike and i havent fitted a mech before so its all new.... I couldnt fit it so i took it to the bike shop.... He took at look at the mech, Shimano Deore this one (http://www.chainreactioncycles.com/viewproduct.asp?category=Gear+Mechs+Front&ModelID=825) ... he said he may not be able to fit it cos i have the wrong one... he said that this mech was not compatible with the bottom bracket I had.... the bottom bracket is the same one that came with my bike.... its a

Shimano LP-28, square taper, 68 x 113mm, sealed cartridge

Does anyone see why this wont fit to my mech? Or is he just bull****ting to get a bit more money out of me....

The deraileur pictured in this link is a clamp on which requires no BB connection of any type.

I'm confused. Are you sure thata the one you ordered or perhaps they shipped the wrong one.

This scenario is one reason I tend to buy stuff from my LBS if I am unsure about it. If you get the wrong thing you do not have to hassle with shipping to get it corrected. It may cost a bit more but if it removes the confusion it is worth the expense.

Check the shipping slip against the part they sent. Maybe it was a screw up.

its exactly the same as the pic shown.... Because i ordered an lx and was told it wouldnt fit cos it was bb mounted.... so i cancelled it and got this one instead, i got it cos it said it was compatible with jsut about anything

What I do not get is why the BB makes any difference at all since this mech is not BB mounted. It is sounding like BS to me now that you mention that.

If you are mechanically inclined to try installing it it is not very difficult to set up a front mech. The mech should also have an installation detail with it.

Is the BB issue something to do with the width of the spindle? How is your chainline. The middle ring should line up with the middle of the cog cluster.
If this is true, and you have a round seat-tube of suitable diameter, then you just fit the thing.
What could possibly go wrong?

the problem is im thick lol... i couldnt fit it... and ur right it does sound like bs... Ill make sure to mentioon it to him further when i pick it up in 55 mins

Well... Just got the bike back from the shop... the new mech is working... he said that it was only out by a couple of mm and I checked it on the way back and everythings working fine... Nice price too... from now on, Anything really complicated on a bike Ill take to a shop....

thats not a BB mount f/d its a frame mount