When I was a kid I had a Raleigh that as I remeber was about £300, did thousands of miles and never went wrong. So I expected normal service to be resumed.
I bought a hardrock sport mountain bike and hit the local tracks. I loved it, even if I was probably a ridiculouse sight and very slow.
The front wheel collapsed within 3 weeks (landing me hard head first in a rock garden) this was the initial spur to start some exstensive upgrading.
Many many £££'s later the Hardrock had new wheels, forks and brakes and a few other bits as the originals failed and wore out. At this point I bought a lovely Giant Trance in an intrest free sale ( for my wife to ride ). Well my BB bearings failed and I started to ride her bike, and found it was quite nice to have suspension and seeing as I had so many nice bits on the Hardrock perhaps a new frame was in order......so I bought a Cove G Spot on Ebay......it lasted a year or so before the frame snapped.....curse that alluminium. So I replaced that with a brand new steel hard tail, the on-one Inbred.
At this point, I decided to do lejog, so I would need a touring bike......ebay......one rather knackered mercian arrived.......so after exstensive rebuild and renovation ( why didn't I just bite the bullet and buy a new one??) I now have a lovely Mercian.
Meanwhile, a friend gave me his old Galaxy that had been laying outside for 2 years or so.......so after exstensive rebuild the wife now has a 'new' bike too.
Somewhere along the line I managed to aquire another mountain bike too (cycle to work scheme) an orange 5.
So in total we have 3 MTB and 2 tourers and two scrap heaps with wheels awaiting their fate.
How many bikes do you have?
How do I know when I have enough?
How can I keep them all in the house without going through divorce?

