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Bicycle Parts For Sale By Owner in Boulder, CO

  1. see also
  2. Louis Garneau Ergo Air Carbon Cycling Shoes - size EU 42
    $60
    Longmont
  3. womans Specialized Road bike shoes, new
    $40
    south boulder
  4. LOOK KEO Road Cleats Bicycle Pedal Red
    $10
    Boulder
  5. E-Bike Loading RAMP + License Plate Relocation Bracket
    $80
    Longmont
  6. (2) NEW IN BOX! Yakima LockJaw Rooftop Bike Trays
    $130
    Longmont
  7. New! 26" Street Tires
    $30
    Longmont
  8. $200 Rudy Project Airstorm Cycling Helmet
    $75
    SW Longmont
  9. NEW! Osprey Berm 12L Biking Backpack
    $100
    Longmont
  10. Bike Anti Theft Alarm *NEW
    $10
    Louisville
  11. NEW Slime Self-Sealing Bike/Bicycle 29" Inner Tube Schrader Valve
    $5
    Niwot
  12. CycloSpirit Derraileur Hanger Alignment Tool - Gauge
    $40
    Niwot
  13. Selle Italia X-LR Kit Carbonio Superflow, Saddle, 268 x 140mm, 138g, B
    $120
    Boulder
  14. ITM Aluminum Road Bike Drop Bar Handlebar
    $40
    Boulder
  15. Bike storage floor stand
    $10
    Boulder
  16. Carbon 650b wheelset: LB rims + i9 hubs + Sapim spokes
    $500
    Boulder
  17. Topeak Tri-cage Carbon (for under saddle) (x2)
    $30
    Boulder
  18. XCadey chainrings, 50/34t, 110 BCD, 5 bolts
    $20
    Boulder
  19. Yakima 2 bike rack
    $200
  20. Campagnolo Record 10 Speed Rear Derailleur
    $100
    Boulder
  21. Campagnolo Chorus 10 Speed Front Derailleur - Used
    $20
    Boulder
  22. 3 Bicycle Inner Tubes + 2 CO2 Cartridges with nozzle
    $20
    Boulder
  23. Campagnolo Record Rim Brakes
    $100
    Boulder
  24. Bottom Bracket Tool - 44mm x 16-notch - BBT-69.2
    $5
    Boulder
  25. Schwinn Approved 1970’s Generator Lights /Germany
    $30
  26. Kickstand/ Adjustable most adult bikes
    $20
  27. Track Forks from the 50’s 1 inch.
    $60
  28. Bike racks x2
    $20
  29. Syntace Vector Carbon Bars MTB.
    $60
  30. Sport Rack Down Tube Adaptor
    $25
  31. Yakima Roof Top Bike Carriers / price is for both
    $140
  32. FSA 44 Tooth chain ring. 104 BCD
    $40
  33. Original Schwinn Grips
    $30
  34. Continental Home Trainer Tires 700c x2
    $25
  35. Easton Monkey Bar
    $40
  36. Forks 1 , 11/8 forks threaded.
    $40
  37. Mountain Bike Stem/Raceface
    $60
  38. Reynolds Carbon Fork
    $60
  39. TRP TRI Bike Brake Caliper Rear
    $40
  40. On guard combo lock
    $20
  41. Bontrager Tire Hard case light 700x25
    $25
  42. Shimano Deore 9 Speed Shifter and Derailluer
    $25
  43. Cane Creek Headset 11/8 NEW
    $40
  44. Headset Cane Creek1 1/8 / Titanium preload assembly
    $50
  45. Bike Build Kit , Ultegra , Mavic, RXL, 105, Bontrager speed brakes.
    $200
  46. SQLab 30X 12 degree mid-rise bar
    $60
    Boulder
  47. Ergon SR Allroad Core saddle
    $60
    Boulder
  48. Park Tool PRS-20 Team Race Stand
    $80
    Boulder
  49. TYMO hair straightener comb **NEW
    $40
    Broomfield
  50. Racermate CompuTrainer Pro - Bike Trainer System
    $300
    Longmont
  51. NEW with tag! Pearl Izumi Elite Women's Drop Tail Cycling Bibs - SMALL
    $80
    Longmont
  52. Bontrager RACE Threadless Alloy Road Stem
    $15
    Longmont
  53. Bontrager Race Alloy Seat Post
    $18
    Longmont
  54. Bontrager Race Alloy Handle Bars
    $18
    Longmont
  55. Selle Italia SLK Saddle
    $15
  56. New / Never mounted Kenda Kaliente L3R Pro Road Tire
    $15
  57. Shimano Ultegra 6500 Road Bike Front Derailleur
    $20
  58. Shimano Ultegra 6500 Road Bike Front and Rear Brakes
    $30
  59. 29" alluminum front rim
    $20
    Boulder
  60. HighPOWER Li-Ion Battery Charger Model HP8204L2 Input 115/230VAC 60/50
    $60
    Boulder
  61. Bontrager GR Elite Isozone Gravel Handlebars 31.8mm 42cm New
    $40
    Boulder
  62. Carbon Fiber road bike saddle super light
    $65
    Boulder
  63. Stone Chain Rings 50/37 12 speed AXS only
    $65
    Boulder
  64. Velocity Blunt 35 Bicycle Rim 27.5
    $200
    South Boulder
  65. Vintage Blackburn Bicycle Rear Cargo Rack
    $30
    South Boulder
  66. Performance Hitch Mount Bicycle Carrier
    $70
    South Boulder
  67. Axiom Pet Basket with Rack and Handlebar Mounts
    $60
    South Boulder
  68. Giant GX28 rim and Giant Crosscut tire
    $100
    South Boulder
  69. Shimano Deore XT Rear Hub
    $30
    South Boulder
  70. Bontrager Select Bicycle Rim - 26"
    $40
    South Boulder
  71. Topeak Alien II 31-function bicycle multi-tool
    $50
    South Boulder
  72. Yakima Hitch Mount 4 Bike Rack
    $80
    South Boulder
  73. Specialized Globe Pannier Adapters - Front
    $50
    South Boulder
  74. Trek Bontrager Interchange Removable Rear Basket
    $30
    South Boulder
  75. Saris Bones 2 Bike Trunk Rack
    $70
    South Boulder
  76. Nantucket Bike Basket
    $30
    South Boulder
  77. Thule 822 Bed Rider Truck Bike Mount Aluminium
    $60
    South Boulder
  78. Lemond Revmaster Pro Seat Post
    $10
    South Boulder
  79. Yakima Track Rail Bicycle Tray Carrier for Rooftop Racks 🚴
    $50
    South Boulder
  80. MTB Wheels Alexrims Racers Edge Adventurer + Bontrager
    $100
    South Boulder
  81. NEW! Cycling Shoes with BOA with cleats and shoe covers
    $75
    Longmont
  82. Pearl Izumi Cycling Shoes - sz 45.5
    $30
    Longmont
  83. Yakima 2-Bike Hitch Rack for 2” Hitch Receiver
    $140
    Louisville
  84. Thule Yepp Maxi 2 Frame Mount Child Bike Seat
    $70
  85. Dero Fixit Repair Station NEW
    $400
    Longmont
  86. Yakima 2-Bike Hitch Rack for 2” Hitch Receiver
    $120
    Louisville
  87. CrankBrothers Highline 7 Dropper Post, 100mm, 31.6 Dropper Seatpost
    $40
    Boulder
  88. Carbon fiber race rim 29"
    $40
    Boulder
  89. Garage cleanup (MTB )
    $123
    Boulder
  90. Specialized S Works Carbon 175mm 52/36 11-speed BB30 crankset
    $120
  91. SR Suntour XCR34 29" Fork
    $50
    Lafayette
  92. 6KU Track Wheel Set
    $30
    Lafayette
  93. Women's 'Specialized' Adjustable Bike Helmet
    $25
    SW Longmont
  94. Yakima 2-Bike Hitch Rack for 1-1/4” Hitch Receiver Like New Condition
    $160
    Louisville
  95. Travel Trac Fluid+ Bicycle Trainer with Remote & Front Wheel Stand
    $120
    Louisville
  96. Giro Mountain Bike Helmet
    $15
    Boulder
  97. 1993 Vintage Blackburn Bicycle Rack Strap
    $8
    Longmont
  98. Vintage 1992 Giant Bike Expandable Accessory Bag
    $8
    Longmont
  99. Vintage USA Concord Bicycle Replacement Tube, Unused - 26 x 1.5
    $3
    Longmont
  100. Nashbar Angliru Road Bike Pedals (Black)
    $20
    Boulder
  101. Comfy bike seats and new E Bike Tires
    $180
    S Boulder
  102. saddle bags basket
    $40
    Longmont
  103. MKS Sylvan touring pedals
    $20
    Longmont
  104. Brooks b17 saddle
    $80
    Longmont
  105. 2 Bike Cover for Bike Rack
    $90
    SW Longmont
  106. NEW Mt Bike Tire - 26" x 1.90"
    $20
    Longmont
  107. Yakima Freeloader
    $80
    Erie
  108. Thule Wheel On wheel carrier
    $35
    Erie
  109. Mustache Bars
    $45
    Erie
  110. XT Mountain Bike Pedals
    $80
    Erie
  111. NEW! BOA Cycling Shoes with cleats and shoe covers
    $75
    Longmont
  112. Women's Giro Reva Mountain bike shoes - EU 39 - LIKE NEW
    $50
    Longmont
  113. Fox 38 170 29er Fork
    $350
    Lafayette
  114. Light & Motion Seca 700 lumen bike light
    $25
    Boulder
  115. Vintage jersey - circa 2010 Angry Catfish
    $100
    Boulder
  116. DT Swiss 350 Boost 27.5 Wheels, Tires, Rotors
    $300
    Boulder
  117. Biking Clothes - Men's S,M,L
    $0
    Longmont
  118. Fox Float X2 FACTORY SERIES 210 x 55 mm (Standard Metric)
    $150
    Lafayette
  119. NEW! Mountain Bike Shoes, SPD - EU 40
    $30
    Longmont
  120. Bike Project: Steel Bike Frame with parts
    $20
    Longmont
  121. Bicycle Rack
    $100
    Lafayette
  122. Assos Mercedes AMG Petronas Full-length Sleeve Jersey (White) - Small
    $49
    Boulder
  123. Bike Light - LED headlight and rear light
    $15
    Boulder
  124. 2022 Performance Elite Series 34 FLOAT 29 140mm FIT4
    $400
    longmont
  125. BikeYoke Revive Max 160mm 34.9mm
    $280
    longmont
  126. Ibis Blackbird Send MX Mullet Wheelset
    $500
    longmont
  127. Cycle Ops (CycleOps) bicycle trainer
    $50
    Wheat Ridge
  128. New In Box SIZE 12!SPECIALIZED 2FO "Clip in " Enduro/ Dh shoes
    $40
    Longmont
  129. New Knog Oi Bike Bell
    $15
    Boulder
  130. Bike Stand - Ninja Stoke - Wood
    $30
  131. $110 GORE Bike Wear Gore-Tex Shoe Covers
    $60
    Longmont
  132. NEW Mountain Bike Shoes - size EUR 41
    $40
    Longmont
  133. SARIS Bones Bike Rack
    $30
    Longmont
  134. Schwinn Voyageur 21, helmet and lock
    $60
    Longmont
  135. Sidi Eagle 7 Mountain Bike Shoes size 47.0 / 12.0
    $30
    Boulder
  136. 4 Bike/MultiSport Helmets
    $50
    Longmont
  137. NEW! Commuting Backpack with Helmet Pocket
    $40
    Longmont
  138. Simonetti Aero Aluminum Bike Frame
    $150
    Longmont
  139. Bontrager Carbon Cycling Shoes with eSoles - sz 45
    $75
    Longmont
  140. Giant Romero SL saddle
    $20
    Boulder
  141. Specialized Power Saddle
    $60
    Boulder
  142. Kids Pearl iZumi wind jacket and vest
    $20
  143. Troy Lee Designs Stage - Small Full Face
    $100
  144. [brand new] Oquo (Orbea) MC32 Mountain Bike Wheels w/ tires and rotors
    $400
    Boulder
  145. Bike Shoes - Men's/Women's
    $40
    Longmont
  146. Carradice Super C saddlebag
    $50
  147. Bicycle Basket
    $20
    Longmont
  148. Mason x Hunt 4 Season tubeless disc rear wheel 700c Shimano freehub
    $120
    Boulder
  149. Quality Wheels RS505/DT R500 Disc Rear Wheel (700c) (12 x 142mm)
    $65
    Boulder
  150. Redshift Sports ShockStop PRO Suspension Handlebar Stem 90mm +/- 6 deg
    $150
    Boulder
  151. Whisky Parts No. 7 Carbon Seatpost 30.9 x 400mm straight
    $65
    Boulder
  152. Shimano HG-700 11 speed cassette 11x34 mint condition
    $35
    Boulder
  153. Shimano Ultegra HG800 11 speed cassette 11x34
    $60
    Boulder
  154. Silca Tattico Mini Pump
    $30
    Boulder
  155. Planet Bike Mini Versair Pump
    $15
    Boulder
  156. Banjo Brothers Bicycle Rack Top Bag very good condition
    $20
    Boulder
  157. Bell 2 bike rack
    $55
    Erie
  158. Kinetic indoor bike trainer
    $50
    Boulder
  159. Ceiling Bicycle hangars
    $10
    longmont
  160. Shimano Di2 Remote Climbing Shifter
    $40
    Boulder - Longmont - Denver
  161. LOOK A-Stem
    $85
    Boulder - Longmont - Denver
  162. Shimano Ultegra Rear Derailleur 11 Speed
    $35
    Boulder
  163. Deda Zero100 Team Stem- NEW!
    $55
    Boulder
  164. Fulcrum Racing 4, Disk brake, Tubeless ready - New
    $270
    Boulder - Denver
  165. Ortlieb Waterproof Bike Panniers
    $100
    Boulder
  166. 2022 SRAM GX Eagle 1275, 12 Speed Cassette, 10-52T
    $100
    Boulder
  167. SRAM XX1 Eagle DM DUB "Boost" Carbon Crankset
    $225
    Boulder
  168. Swift Catalyst Bag
    $125
  169. MAXXIS Rekon 27.5x2.6 mountain bike tires
    $10
    Longmont
  170. CRAFTSMAN TOOLS/ Rally Box
    $150
    Longmont
  171. Feedback Sprint Repair Stand
    $175
    Boulder
  172. BMA Bike Jersey
    $25
    Louisville
  173. Adjustable BV Bike Kickstand
    $12
    South Boulder
  174. Guess silky small flower dress
    $3
    Boulder
  175. Brooks cambium C15 saddle, like new
    $100
    Boulder
  176. Sram Crankset X7 175mm BB30
    $100
    Boulder
  177. Sram Crankset Rival 22 175mm BB30 - $100
    $100
    Boulder
  178. KEO Carbon Pedals (look)
    $50
    Boulder
  179. Shimano Ultegra pedals (look)
    $50
    Boulder
  180. Water Bottle Carrier - Profile Design RML
    $30
    Boulder
  181. Thule Velo Vise Fork-Mount bike trays and cross bars
    $35
    Boulder
  182. Premium Gravel/Road Bike Parts
    $0
  183. Yakima Bike Rails
    $45
    Lafayette
  184. 2-Bike hitch mounted bike rack
    $50
    Lafayette
  185. Yakima Hitch Bike Rack
    $475
    Lafayette
  186. 2 Lolo bicycle handlebar rack mounts
    $30
    Boulder
  187. Thule 4 Bike Hitch Rack
    $100
  188. Used Trex black bicycle saddle seat
    $5
    Longmont
  189. Front MTN wheels great tires
    $10
    SE Boulder
  190. Dual battery ebike conversion kit
    $300
    Boulder
  191. WTB Silverado Saddle - Titanium
    $70
  192. Cannondale SI Spidering Plateau Chainring 32t - NEW
    $35
  193. SRAM GXP Carbon Crank - Direct Fit chainrings with spider
    $45
  194. Fork Up - Cannondale Lefty Wheel Mount
    $15
  195. Shimano Dura Ace RD-7700 9-Speed Rear Derailleur
    $30
  196. Lake Gravel shoesMTB shoes
    $150
    Longmont
  197. Shimano Gravel/MTB Shoes XC702 Wide
    $110
    Longmont
  198. Rocky Mounts Step Thru Frame Brace
    $15
  199. Serfas hardshell bike box
    $200
    Boulder
  200. Calfee carbon fiber disc road fork
    $60
    Boulder
  201. Continental 4Season 25mm Brand New Road Tire
    $50
    Superior
  202. Ritchey Carbon Breakaway Travel Bike
    $2,000
    Lafayette
  203. Complete Yakima roof rack system
    $950
    Boulder
  204. BOB Trailer
    $200
    Boulder
  205. SID Ultimate 120mm travel 44 rake-remote ready
    $675
    boulder
  206. Thumb throttle for ebike
    $10
    Louisville
  207. Rockymounts fork mount for Maverick Forks
    $20
    Boulder
  208. Emporia GC3 Pro Gravel HED Wheels
    $900
    Boulder
  209. Yakima hitch mount hanging bike rack with integrated cable lock
    $100
    Superior
  210. Stumpjumper Evo Alloy Frame S3
    $700
  211. Fulcrum Rapid Red 500 700c gravel wheelset
    $180
    Lafayette
  212. RockyMounts 2-bike Hitch Rack
    $120
  213. Thule 56" square crossbars
    $50
    Longmont
  214. 2.6 qt ULTRASONIC PARTS CLEANER
    $25
    Boulder
  215. FOX Transfer Factory Dropper Seatpost 175mm x 30.9
    $100
    Boulder
  216. Rock Shox Reverb dropper seat post 100mm x 31.6 - needs some work
    $50
    Boulder
  217. KS Cruxi CRUXi Dropper Seatpost 100mm travel x 31.6 diam
    $100
    Boulder
  218. Giro Privateer R Shoe size 44 10.25
    $30
    Boulder
  219. Kids MTB gear lot everything you need - shoes,shirts, gloves pand pads
    $25
    Boulder
  220. Shimano ME4 Trail SPD Shoes EU39
    $50
    Boulder
  221. Manitou Machete 29+ 120mm travel
    $100
    Longmont
  222. 2023 Fox Transfer SL 31.6 new in box
    $200
    Longmont
  223. Wren Sports Suspension fork 150mm
    $300
    Longmont
  224. Bell Bike Helmet
    $10
  225. Sidi Dragon 3 Carbon MTB Size 44
    $50
    Louisville
  226. Rocky Mounts 2 Bike Hitch Rack - 1inch
    $100
  227. Mavic Cosmic SL 32 Wheelset 12mm x 100mm 12mm x 142mm Centerlock Shima
    $550
    Berthoud
  228. QERIDOO Speedkid1, buggy, walker, jogger Petrol
    $150
    Berthoud
  229. Stems
    $10
    Longmont
  230. Bike seatposts. Variety
    $10
    Longmont
  231. Handlebars road Variety
    $20
    Longmont
  232. Set Continental Grand Prix 5000 Bike Tires
    $60
    SE Boulder
  233. Vintage 7sp Wheels – Mavic hubs/Matrix rims
    $150
    Lafayette
  234. Tubus Duo front rack
    $40
  235. Giant XCR XL Frame: SL-Aluxx
    $400
    Superior
  236. Absolute Black 38t round chainring. 104 bcd
    $40
  237. Mavic 700c road bike carbon fiber front wheel
    $60
    Boulder
  238. 26x2.35 City Tires Used
    $18
    S Boulder
  239. ENVE SES 3.4 AR Disc Wheels NIB
    $1,800
    S Boulder
  240. 3T Stem 120mm
    $24
    S Boulder
  241. 3T Carbon Handlebar, Stem, Seatpost w Olympic Graphics
    $395
    S Boulder
  242. Selle Italia Flite Saddle - Giro d'Italia Special Edition- NIB
    $95
    S Boulder
  243. Campagnolo Tool Set
    $4,750
    S Boulder
  244. NOS Campagnolo C Record Rear Hub 32h
    $120
    S Boulder
  245. Mapei Socks- Defeet
    $20
    S Boulder
  246. New Shimano WR 62L Dynalast Carbon Cycling Shoes-Size 38
    $50
    Louisville, CO
  247. Rhode Gear Bike Trunk
    $20
    Martin Acres
  248. Float Float X/DPX2 (1/2" shaft) Volume Tuning Kit
    $12
    Boulder
  249. Shimano ME5 MTB Shoes Men's 10.5
    $50
    Boulder
  250. Sram X01 11 speed cassette new 11-42
    $200
    Boulder
  251. Answer ProTaper carbon fiber handlebar
    $40
    Louisville
  252. 26 inch presta valve bike tubes
    $10
    Longmont
  253. Vintage bike parts, tires, frames, rims
    $900
    Longmont
  254. TAG ALONG $40/ SHOES $20/ TRAINER $20/ BIKE borrow city $150/ xoearth
    $20
    Boulder
  255. HELMET FLAGS reflective/ BIKE RACK upgrade cargo/ TRAINER/ xoearth
    $35
    Boulder Central
  256. Seatylock brand “Forever “ bike lock
    $50
  257. Kuat NV 2.0 Hitch Rack
    $1,250
    SW Longmont/Boulder
  258. Bontrager Pro 31.6 diameter Carbon seatpost
    $55
    Boulder
  259. REAR SHOCK FOR MTB
    $500
    BOULDER
  260. For Sale: Kinetic Bike Trainer + Accessories
    $150
    Superior
  261. Hard case for bicycles with S&S couplings
    $200
    Broomfield
  262. Rocky Mounts locking fork mounts
    $50
    Broomfield
  263. TRP Spyre Post-Mount Disc Brake Caliper - New in Box
    $50
  264. G-Form Pro-X3 Elbow Pads - Size Large
    $20
  265. RockyMounts quick-release roof bike rack
    $50
  266. Tubus Tara Lowrider Front Bike Rack (Black)
    $50
  267. 27.2 x 220mm Titanium Campagnolo Chorus Seatpost
    $155
    Boulder
  268. Thule Bike Rack
    $199
  269. Bike scrap
    $50
    Louisville
  270. Thule Big Mouth Bike Rack
    $150
  271. CycleOps Bike Trainer
    $85
    Erie
  272. Magnetic Indoor Bicycle Trainer with Resistance Control — Foldable, Or
    $50
  273. Shimano Dura Ace CS-7700 9 Speed Cassette
    $40
    Longmont
  274. Shimano Ultegra FC-6500/6503 172.5mm Crankset Double 53/39T 9-Speed
    $40
    Longmont
  275. Yakima 2/4/5 bike carrier
    $200
    Longmont