There is no way you will get that stuff at those prices, the freewheel you're looking at £15-£20 posted, the cranks £35-40, the booster £15-£20. It might be a 122.5mm, but it all depends on what cranks you have, which you havn't posted yet. Anyway, seeing as you want a set of Tensiles, I assume you're going ISIS, so as long as you get a long ISIS BB then you'll be fine. EDIT: In fact, it doesn't need to be that long, my brother had tensile cranks with a tensile freewheel, and it had loads of clearance, you could probably get away with a 122.5 ISIS bb.