Custom Zero Stack (ZS) headset cups for various model road bikes. • Upper Cup:44.5mm OD x 7.7mm tall Zero Stack (ZS) press-fit headset cup designed for 1-1/8" bearing with 41.8mm OD x 8mm thick dimensions. • Lower Cup: 52.5mm OD x 13.2mm tall Zero Stack (ZS) press-fit headset cup designed for 49.5mm OD x 6.5mm thick bearing Where used OEM: 2026 Allez Sprint Frameset 2025 Allez Sprint Frameset 2025 Allez Sprint Comp 2024 Allez Sprint Frameset 2023 Allez Sprint LTD 2023 Allez Sprint Frameset 2023 Allez Sprint Comp 2022 Allez Sprint Frameset 2022 Allez Sprint Comp 2021 Allez Sprint LTD - SRAM Force eTap AXS 1x 2021 Allez Sprint Frameset
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