Geoffrey Cleland Apps (born London, England, 1949 and died Chirnside, Scotland, 2024) was an English pioneer of all-terrain bicycles.

By 1979 he had designed and created a lightweight bicycle for the wet mud of south-east England that used 650Bx54 Nokia Hakkapeliitta snow tyres from Finland.

Double chainrings and outer guard ring with 5 rear sprockets gave a wide range with a low ratio 20.6” gear which with the tungsten carbide studded Hakka tyres allowed riders to climb extreme gradients.

With tyre pressures lowered the ride off-road was extraordinary with grip and traction levels better than many riders could exploit.

Apps told them about the off-road bicycles he had built and of large diameter 650Bx54 and 700Cx47 Nokia Hakkapeliitta snow tyres that were made in Finland.