80 series springs Q 2

Mal. One of the things which will dictate whether you fit 15'' or 16'' tyres is the model of cruiser you have. Early 80 series used 15'' chrome rims and later 80 series used 16'' grey rims and all the base models used 16'' split rims. The reason for the increase was so as a larger rotor and caliper assy could be used. If you have a post '95 vehicle and you get a 15'' rim to fit then it's a fluke and grinding the caliper body is illegal. Apart from this, I don't think it matters what you fit so long as the tyre meets the load and speed specs for that car. Overall diameters are also important as they can effect the braking, acceleration and speedo of the car. I'm running 285/75 16 BFGs and endure the above maladies in order to get a little more ground clearance. 16'' tyres are certainly more expensive than 15''. I paid $256 each for mine in June. There are so many tyres available today that you should easily be able to find something. Talk to a tyre expert and do a search of this site.

Mal, altough it's very tempting to save some money and go to 15'' rims and tyres it is worth remembering that 16'' will give you more ground clearance. Sometimes every little bit helps.
Cheers