LOT of 3 FSA IS-2-HBS/42 Trek Knock Block Headset Assembly

Product Description: This listing is for a lot of 3 headsets. Replacement FSA OEM Trek Knock Block integrated headset assembly associated with Trek part number 588173. This headset is intended for compatible Trek Knock Block integrated headset applications and includes the components shown. It includes a Knock Block H2419 top cover, split compression ring, upper MR054R 1-1/8" 36° x 45° SL Series ACB bearing, lower MR110R 1.5" 36° x 45° SL Series ACB bearing, crown race, Trek 542756 Knock Block frame chip/stop, and frame chip screw. Buyers should verify fitment by Trek part number, original Knock Block components, or matching headset specifications before purchase. Specifications: OEM FSA Trek Knock Block integrated headset assembly Trek part number: 588173 FSA part number: 14100050000010 UPC: 840031062949 FSA model: IS-2-HBS/42/ACB-R Top cover: Knock Block H2419 Split compression ring Bearing type: SL Series ACB by FSA Upper bearing: MR054R, 1-1/8", 36° x 45°, 873R Lower bearing: MR110R, 1.5", 36° x 45°, 073R Trek 542756 Knock Block frame chip/stop with screw Crown race Weight: ~64gm each MSRP: $59.80 each