also, despite what the HHV site says about bottom bracket heights many "road" fixed wheel bikes are OK to be ridden there - someone can correct me perhaps but you need:
Drops
Rear facing dropouts
front brake removed
bottle cage removed and any braze ons taped over.
Bikes like Langsters, Surly steamrollers and so on are all ok for HHV (at any rate i've seen them on the track). Perhaps that could free up some hire bikes.
also, despite what the HHV site says about bottom bracket heights many "road" fixed wheel bikes are OK to be ridden there - someone can correct me perhaps but you need:
Drops
Rear facing dropouts
front brake removed
bottle cage removed and any braze ons taped over.
Bikes like Langsters, Surly steamrollers and so on are all ok for HHV (at any rate i've seen them on the track). Perhaps that could free up some hire bikes.