Source: https://www.tcdesignfab.com/race-car-roll-cage
The way the forward leg of the main hoop is gusseted is very unusual! Almost art deco or "steam punk".
I wonder what the benefits of this design are compared to the standard reinforcement tube from base to top of the corner?
Meanwhile this design in the rear of the cage is typical of many modern rally cars (and even touring cars like the Peugeot 308 TCR):
[T45 carbon manganese tubing, so presumably thinner wall thickness than mild steel for weight savings, but you never know]
Source: https://www.fensport.co.uk/products/rol ... d-gr-yaris
Aside from the obvious (space for spare tyres and other paraphernalia needed in a rally car), I wonder what the benefit is of not bracing the rear strut towers together? Weight saving since these tubes do very little?
It's a far contrast to elaborate structure in the rear of the E46 M3 GTR replica, presumably a replica of the original 2001 BMW M3 GTR:
Source: https://www.tcdesignfab.com/race-car-roll-cage
Is it simply to do with the modern GR Yaris being a much stiffer bodyshell to start with, than a E46 M3 bodyshell?