Two Nicolai Four Cross and Dual Slalom frames from the the 21st Century,
Both Bikes have extremely sloping toptubes, which was at the time strictly purpose build and not yet as widespread as on today´s bikestandards for hardtails and fullies alike. None the less this radical geometry should prove itself and so Nicolai was ahead of the curve, as they say.


200X-03?! Worldcup Teambike (Prototype WC Fully!)
Red front Triangle and Bronze Elox back
https://www.mtb-news.de/forum/t/helius-cc-4x.115257/

200X-05?! BMXTB "race/pre-race"with custom V-Brake bosses to consider
Offroad Drop build:
non-aero lever & mechanical disc-brake mounting for WIDE modern Nitto Farr bars Cockpit - previous iteration "Wtb-Dirt Drops",
https://fotos.mtb-news.de/p/2669358?in=set