What may I wear on my rear?
Posted 20 January 2008 - 12:31
The question is, what size wheel can I stick on the back? I run with 600s on 6" rear wheels, which is fine for the lowly-powered 1500. The 2500 can take a larger tyre/wheel combination easily. Everyone with a 2500 nowadays seems to run 6.5" width rears, but the tyres (650s I believe) are recommended by Dunlops to run on anything from 6" to 7.5" rims. Looking at the tyres/wheel combination, it would seem that the tyres may more comfortably sit on 7" wheels.
But, did they so run in period? That's the question.
Your comments would be appreciated. Thanks.
Posted 21 January 2008 - 17:25
If you use R5 which is probably the more correct tyre pattern (CR48 came out in 1962, and CR65 used on most Ls was 1965) then optimum width for a 650 x 15 is 6", dimensionally this is about the same as a 550L x 15.
Lotus certainly made some very wide 6 bolt wobbly rear wheels. I swapped a pair with Alan Baillie many years ago, I think they were 7" rims - it might be worth seeing if he still has them.
They seem to have moved to 13" rims at the same time as rim widths increased so it is unusual to find wide 15" wobblies, but they did exist and given the timing of the Tasman races it is quite possible they had the last/widest 15" wheels.
Presumably you have the Tony Shelly car that ran a 2750cc FPF? I think the other 18/21s that ran bigger engines only did so in their original 18 form?
Posted 21 January 2008 - 18:09
Clive Puzey ran another 2.5-engined 18/21 in international races in South Africa about the same time
Posted 22 January 2008 - 08:21
Yes, it is Shelly's car, which is listed in the earlier Int'l NZ races as having a 2.7, but I think the general balance of view is that it was only running 2.5. I guess we'll never know.