Yes, the front rotors are the same diameter, thickness and offset/height and are interchangeable between early Defo and D1/RRC. Ø298mm x 14mm thick with a 70mm height. Also, if you want to go to vented you can get vented rotors and space the calipers you already have with a kit from Zeus (UK), or LRA, Graeme Cooper (in ascending $$$$).
Yes, the solid D1 fronts can be used on the rear, if you use the matching Defo 110/130 rear calipers. Not compatible with the std D1/RRC rear calipers (different diameter (Ø290mm) and thickness (11.7mm)). This should rebalance the brake system however your brake pedal travel will increase even more (moving more fluid as the Defo's use 26% larger pistons than D1/RRC).

Originally Posted by
Foxspell
Apologies if this is a bit off track.
If I went for the front 110 calipers from a 1986 to 1993 model that suits non vented rotors, can they be fitted to my original non vented 1997 D1 rotors that I had recently replaced in the search for better braking?
Also if I do have to buy new front rotors, is it true that I could then use the calipers and rotors taken off the front on the rear?
Any part numbers would be greatly appreciated.
Many thanks,
Lee
DiscoClax
'94 D1 3dr Aegean Blue - 300ci stroker RV8, 4HP24 & Compushift, usual bar-work, various APT gear, 235/85 M/Ts, 3deg arms, Detroit lockers, $$$$, etc.
'08 RRS TDV8 Rimini Red - 285/60R18 Falken AT3Ws, Rock slider-steps, APT full under-protection, Mitch Hitch, Tradesman rack, Traxide DBS, Gap IID
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