Beans, The Rimmer's TR7/8 catalogue v2.2 has an article on Harris Mann's original sketches of how he wanted the car to look - almost all of them show it with low profile tyres & alloy wheels. IMHO the car looks better with lower profile tyres and you would be following the original design idea before the bean (ouch!) counters got involved... Whatever you decide, your hard work has made it one fabulous car!