Crank/bottom bracket issues
Few weeks ago I bought a fixed gear bike, its an old frame with newer parts. Frame is a falcon, looks pretty nice - but not too nice (the idea is that it can be locked up and not potentially stolen) To save money I used the chainset that was on the bike originally but had the bottom bracket replaced. (as well as headset etc)
After a couple days riding there was a ticking/clicking noise. At first I thought it was the rear wheels bearings had gone, but it was a new wheel so seemed odd. I was (and still am) convinced that something to do with the bottom bracket or chainset isn't right. I took it into the shop and they said they'd take a look, serviced the bottom bracket and told me nothing was wrong. So I took it for a ride and the problem is still there. I'll describe it and hopefully some suggestions will come to light...
If I pull on the cranks, wobbling them back and forth (counter-clockwise) they move, about 1mm. There was noticeable side to side movement, though this has gone since the BB was serviced. The cranks felt like they were grinding. When moving the cranks clockwise, looking at the chain there is a noticeable movement in the chain-line, perhaps nearly 2mm, on every rotation.
So what do I do? Is it just me?
The shop said if I'm still not happy they will replace the BB with a better one. Could the cranks be an issue due to the age?
I don't exactly want to start throwing money at a bike I've just bought.
Should I ask for my money back? Or ask for new cranks to be installed? The bike is going to be used to commute, so its going to save me money. But I'm moving away from home in 3 weeks, so ideally this needs to be sorted out soon. I don't want to go uni have a bike on my hands that is broken and need to pay for repairs and/or be getting the bus and spending money on that!
Thanks in advance for any suggestions!