seeking T slot hardware for Rivian crossbars

T-Slot Adapter for TopWater Add the SmarT-Slot™ Kit 5 to the TopWater™ box for an even sleeker profile on T-Slot Crossbars This easy hardware kit replaces

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yakima t slot accessories - Designed to work exclusively with Yakima HighSpeed and HighRoad bike mounts - Compatible with Yakima JetStream bars and most other T-slot style crossbars

yakima smartslot kit 2 Securely attach a Yakima HighRoad or HighSpeed bike mount to any standard T-Slot equipped crossbars with the Yakima SmarT-Slot Kit 1 YakimaHD Bar SL Adapters