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air springs
reliable shifting
– 1-hole grommets: Wireless SRAM eTap & Shimano 12S Di2
so you're covered regardless of your brake hose and derailleur cable configuration
Chain tensioner
Bontrager Expander Plug and Top Cap Headset 291288 air springsProtect your carbon steer tube the right way. The Bontrager Headset Expander Plug and Top Cap is the correct and recommended alternative to a traditional star nut for Trek carbon fibre steer tubes offering a secure, damage free installation that won't compromise the structural integrity of your fork. Unlike a star nut, which is hammered into place and can cause irreversible damage to a carbon steer tube, this expander plug uses a clamping mechanism
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