Quote Originally Posted by 470four
[quote author=Mark_Able link=1304443038/4#4 date=1304453214]Sounds like it's been tightened with an air-gun. Bad news if so. >
Ditto...

Airgun at 200n/m to remove & tighten the wheelnut (heaven forbid they should actually use hand tools... ) then the wheel has been tensioned by pulling the spindle back and doing the axle nut up in a BMX-stylee, not by doing up the tensioner bolts? - as you have been riding the bike the axle has no tensioner bolts to push against & so gets pulled forward by the chain pull, hence a slack & floppy chain... :

W*nkers. Get them to come out and sort the bike, if they kick off then quote the phone number for Rogue Traders.
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Thanks, that makes some sense.

I'm a bit surprised cos I've always rated the service I get there... I'll give 'em a call and get it sorted.