The Topeak TetraRack GR2 expands on the GR1 design with enhanced cargo versatility and mounting options for gravel bikepacking. The aluminum platform supports up to 15kg load capacity while adding integrated accessory mounts and improved pannier compatibility. Disc brake clearance and wide tire accommodation maintain compatibility with modern gravel setups.15kg maximum load capacity matches GR1 strength with enhanced cargo mounting versatilityIntegrated accessory mounting points accept lights pumps and additional gear attachmentEnhanced pannier compatibility with improved hook positioning and stability featuresAluminum construction maintains strength-to-weight balance for loaded gravel adventuresDisc brake clearance and wide tire compatibility up to 700x45c equivalent sizesGR2 design adds functionality while maintaining gravel-specific geometry optimization