The Twinblade Aluminum Frame is excellent at transferring energy from each stride to the 84mm wheels

but also grip and slide like 99A and 101A wheels do

This perfect interface with the axle

Exclusive PU Colour Black Core Colour Exclusive PU Width 24mm

With maximum kicktail

Rollerblade RIVAL 12" FRAME 4X100 (1PR) Orangatang The Twinblade Aluminum Frame isThe Rival 4x100 Frame gives speed skaters the ultimate performance. The 12 305mm 7000 extruded aluminum frame provides torsional rigidity and stability. It allows great acceleration with its speed inspired design and wheel base and has 165 & 195mm mounting points. Included: (2) 12 extruded aluminum frames, (8) racing axles, (4) boot screws and a 4mm Allen Key. FEATURES: MADE FOR SPEED 4x100 Quicker acceleration for speed elite skaters needing a medal