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Bicycle Parts For Sale By Owner in Boulder, CO

  1. see also
  2. CrankBrothers Highline 7 Dropper Post, 100mm, 31.6 Dropper Seatpost
    $40
    Boulder
  3. Carbon fiber race rim 29"
    $40
    Boulder
  4. Thule Cargo Box
    $375
  5. NEW! Commuting Backpack with Helmet Pocket
    $40
    Longmont
  6. Bike Shoes - Men's/Women's
    $40
    Longmont
  7. Travel Trac Fluid+ Bicycle Trainer with Remote & Front Wheel Stand
    $120
    Louisville
  8. Yakima 2-Bike Hitch Rack for 1-1/4” Hitch Receiver Like New Condition
    $160
    Louisville
  9. 2.6 qt ULTRASONIC PARTS CLEANER
    $25
    Boulder
  10. FOX Transfer Factory Dropper Seatpost 175mm x 30.9
    $100
    Boulder
  11. KS Cruxi CRUXi Dropper Seatpost 100mm travel x 31.6 diam
    $100
    Boulder
  12. Rock Shox Reverb dropper seat post 100mm x 31.6 - needs some work
    $50
    Boulder
  13. Giro Privateer R Shoe size 44 10.25
    $30
    Boulder
  14. Shimano ME4 Trail SPD Shoes EU39
    $50
    Boulder
  15. Kids MTB gear lot everything you need - shoes,shirts, gloves pand pads
    $25
    Boulder
  16. Nashbar Angliru Road Bike Pedals (Black)
    $20
    Boulder
  17. Louis Garneau Ergo Air Carbon Cycling Shoes - size EU 42
    $60
    Longmont
  18. womans Specialized Road bike shoes, new
    $40
    south boulder
  19. LOOK KEO Road Cleats Bicycle Pedal Red
    $10
    Boulder
  20. E-Bike Loading RAMP + License Plate Relocation Bracket
    $80
    Longmont
  21. (2) NEW IN BOX! Yakima LockJaw Rooftop Bike Trays
    $130
    Longmont
  22. New! 26" Street Tires
    $30
    Longmont
  23. $200 Rudy Project Airstorm Cycling Helmet
    $75
    SW Longmont
  24. NEW! Osprey Berm 12L Biking Backpack
    $100
    Longmont
  25. Bike Anti Theft Alarm *NEW
    $10
    Louisville
  26. NEW Slime Self-Sealing Bike/Bicycle 29" Inner Tube Schrader Valve
    $5
    Niwot
  27. CycloSpirit Derraileur Hanger Alignment Tool - Gauge
    $40
    Niwot
  28. Selle Italia X-LR Kit Carbonio Superflow, Saddle, 268 x 140mm, 138g, B
    $120
    Boulder
  29. ITM Aluminum Road Bike Drop Bar Handlebar
    $40
    Boulder
  30. Bike storage floor stand
    $10
    Boulder
  31. Carbon 650b wheelset: LB rims + i9 hubs + Sapim spokes
    $500
    Boulder
  32. XCadey chainrings, 50/34t, 110 BCD, 5 bolts
    $20
    Boulder
  33. Topeak Tri-cage Carbon (for under saddle) (x2)
    $30
    Boulder
  34. Yakima 2 bike rack
    $200
  35. Campagnolo Record 10 Speed Rear Derailleur
    $100
    Boulder
  36. Campagnolo Chorus 10 Speed Front Derailleur - Used
    $20
    Boulder
  37. Campagnolo Record Rim Brakes
    $100
    Boulder
  38. 3 Bicycle Inner Tubes + 2 CO2 Cartridges with nozzle
    $20
    Boulder
  39. Bottom Bracket Tool - 44mm x 16-notch - BBT-69.2
    $5
    Boulder
  40. Schwinn Approved 1970’s Generator Lights /Germany
    $30
  41. Kickstand/ Adjustable most adult bikes
    $20
  42. Track Forks from the 50’s 1 inch.
    $60
  43. Bike racks x2
    $20
  44. Syntace Vector Carbon Bars MTB.
    $60
  45. Sport Rack Down Tube Adaptor
    $25
  46. Yakima Roof Top Bike Carriers / price is for both
    $140
  47. FSA 44 Tooth chain ring. 104 BCD
    $40
  48. Original Schwinn Grips
    $30
  49. Continental Home Trainer Tires 700c x2
    $25
  50. Easton Monkey Bar
    $40
  51. Forks 1 , 11/8 forks threaded.
    $40
  52. Mountain Bike Stem/Raceface
    $60
  53. Reynolds Carbon Fork
    $60
  54. TRP TRI Bike Brake Caliper Rear
    $40
  55. On guard combo lock
    $20
  56. Bontrager Tire Hard case light 700x25
    $25
  57. Shimano Deore 9 Speed Shifter and Derailluer
    $25
  58. Cane Creek Headset 11/8 NEW
    $40
  59. Headset Cane Creek1 1/8 / Titanium preload assembly
    $50
  60. Bike Build Kit , Ultegra , Mavic, RXL, 105, Bontrager speed brakes.
    $200
  61. SQLab 30X 12 degree mid-rise bar
    $60
    Boulder
  62. Ergon SR Allroad Core saddle
    $60
    Boulder
  63. Park Tool PRS-20 Team Race Stand
    $80
    Boulder
  64. TYMO hair straightener comb **NEW
    $40
    Broomfield
  65. Racermate CompuTrainer Pro - Bike Trainer System
    $300
    Longmont
  66. NEW with tag! Pearl Izumi Elite Women's Drop Tail Cycling Bibs - SMALL
    $80
    Longmont
  67. Bontrager RACE Threadless Alloy Road Stem
    $15
    Longmont
  68. Bontrager Race Alloy Seat Post
    $18
    Longmont
  69. Bontrager Race Alloy Handle Bars
    $18
    Longmont
  70. Selle Italia SLK Saddle
    $15
  71. New / Never mounted Kenda Kaliente L3R Pro Road Tire
    $15
  72. Shimano Ultegra 6500 Road Bike Front Derailleur
    $20
  73. Shimano Ultegra 6500 Road Bike Front and Rear Brakes
    $30
  74. 29" alluminum front rim
    $20
    Boulder
  75. Bontrager GR Elite Isozone Gravel Handlebars 31.8mm 42cm New
    $40
    Boulder
  76. HighPOWER Li-Ion Battery Charger Model HP8204L2 Input 115/230VAC 60/50
    $60
    Boulder
  77. Carbon Fiber road bike saddle super light
    $65
    Boulder
  78. Stone Chain Rings 50/37 12 speed AXS only
    $65
    Boulder
  79. Velocity Blunt 35 Bicycle Rim 27.5
    $200
    South Boulder
  80. Vintage Blackburn Bicycle Rear Cargo Rack
    $30
    South Boulder
  81. Performance Hitch Mount Bicycle Carrier
    $70
    South Boulder
  82. Axiom Pet Basket with Rack and Handlebar Mounts
    $60
    South Boulder
  83. Giant GX28 rim and Giant Crosscut tire
    $100
    South Boulder
  84. Shimano Deore XT Rear Hub
    $30
    South Boulder
  85. Bontrager Select Bicycle Rim - 26"
    $40
    South Boulder
  86. Topeak Alien II 31-function bicycle multi-tool
    $50
    South Boulder
  87. Yakima Hitch Mount 4 Bike Rack
    $80
    South Boulder
  88. Specialized Globe Pannier Adapters - Front
    $50
    South Boulder
  89. Trek Bontrager Interchange Removable Rear Basket
    $30
    South Boulder
  90. Saris Bones 2 Bike Trunk Rack
    $70
    South Boulder
  91. Nantucket Bike Basket
    $30
    South Boulder
  92. Thule 822 Bed Rider Truck Bike Mount Aluminium
    $60
    South Boulder
  93. Lemond Revmaster Pro Seat Post
    $10
    South Boulder
  94. Yakima Track Rail Bicycle Tray Carrier for Rooftop Racks 🚴
    $50
    South Boulder
  95. MTB Wheels Alexrims Racers Edge Adventurer + Bontrager
    $100
    South Boulder
  96. NEW! Cycling Shoes with BOA with cleats and shoe covers
    $75
    Longmont
  97. Pearl Izumi Cycling Shoes - sz 45.5
    $30
    Longmont
  98. Yakima 2-Bike Hitch Rack for 2” Hitch Receiver
    $140
    Louisville
  99. Thule Yepp Maxi 2 Frame Mount Child Bike Seat
    $70
  100. Dero Fixit Repair Station NEW
    $400
    Longmont
  101. Yakima 2-Bike Hitch Rack for 2” Hitch Receiver
    $120
    Louisville
  102. Garage cleanup (MTB )
    $123
    Boulder
  103. Specialized S Works Carbon 175mm 52/36 11-speed BB30 crankset
    $120
  104. SR Suntour XCR34 29" Fork
    $50
    Lafayette
  105. 6KU Track Wheel Set
    $30
    Lafayette
  106. Women's 'Specialized' Adjustable Bike Helmet
    $25
    SW Longmont
  107. Giro Mountain Bike Helmet
    $15
    Boulder
  108. 1993 Vintage Blackburn Bicycle Rack Strap
    $8
    Longmont
  109. Vintage 1992 Giant Bike Expandable Accessory Bag
    $8
    Longmont
  110. Vintage USA Concord Bicycle Replacement Tube, Unused - 26 x 1.5
    $3
    Longmont
  111. Comfy bike seats and new E Bike Tires
    $180
    S Boulder
  112. saddle bags basket
    $40
    Longmont
  113. MKS Sylvan touring pedals
    $20
    Longmont
  114. Brooks b17 saddle
    $80
    Longmont
  115. 2 Bike Cover for Bike Rack
    $90
    SW Longmont
  116. NEW Mt Bike Tire - 26" x 1.90"
    $20
    Longmont
  117. Yakima Freeloader
    $80
    Erie
  118. Thule Wheel On wheel carrier
    $35
    Erie
  119. Mustache Bars
    $45
    Erie
  120. XT Mountain Bike Pedals
    $80
    Erie
  121. NEW! BOA Cycling Shoes with cleats and shoe covers
    $75
    Longmont
  122. Women's Giro Reva Mountain bike shoes - EU 39 - LIKE NEW
    $50
    Longmont
  123. Fox 38 170 29er Fork
    $350
    Lafayette
  124. Light & Motion Seca 700 lumen bike light
    $25
    Boulder
  125. Vintage jersey - circa 2010 Angry Catfish
    $100
    Boulder
  126. DT Swiss 350 Boost 27.5 Wheels, Tires, Rotors
    $300
    Boulder
  127. Biking Clothes - Men's S,M,L
    $0
    Longmont
  128. Fox Float X2 FACTORY SERIES 210 x 55 mm (Standard Metric)
    $150
    Lafayette
  129. NEW! Mountain Bike Shoes, SPD - EU 40
    $30
    Longmont
  130. Bike Project: Steel Bike Frame with parts
    $20
    Longmont
  131. Bicycle Rack
    $100
    Lafayette
  132. Assos Mercedes AMG Petronas Full-length Sleeve Jersey (White) - Small
    $49
    Boulder
  133. Bike Light - LED headlight and rear light
    $15
    Boulder
  134. 2022 Performance Elite Series 34 FLOAT 29 140mm FIT4
    $400
    longmont
  135. BikeYoke Revive Max 160mm 34.9mm
    $280
    longmont
  136. Ibis Blackbird Send MX Mullet Wheelset
    $500
    longmont
  137. Cycle Ops (CycleOps) bicycle trainer
    $50
    Wheat Ridge
  138. New In Box SIZE 12!SPECIALIZED 2FO "Clip in " Enduro/ Dh shoes
    $40
    Longmont
  139. New Knog Oi Bike Bell
    $15
    Boulder
  140. Bike Stand - Ninja Stoke - Wood
    $30
  141. $110 GORE Bike Wear Gore-Tex Shoe Covers
    $60
    Longmont
  142. NEW Mountain Bike Shoes - size EUR 41
    $40
    Longmont
  143. SARIS Bones Bike Rack
    $30
    Longmont
  144. Schwinn Voyageur 21, helmet and lock
    $60
    Longmont
  145. Sidi Eagle 7 Mountain Bike Shoes size 47.0 / 12.0
    $30
    Boulder
  146. 4 Bike/MultiSport Helmets
    $50
    Longmont
  147. Simonetti Aero Aluminum Bike Frame
    $150
    Longmont
  148. Bontrager Carbon Cycling Shoes with eSoles - sz 45
    $75
    Longmont
  149. Giant Romero SL saddle
    $20
    Boulder
  150. Specialized Power Saddle
    $60
    Boulder
  151. Kids Pearl iZumi wind jacket and vest
    $20
  152. Troy Lee Designs Stage - Small Full Face
    $100
  153. [brand new] Oquo (Orbea) MC32 Mountain Bike Wheels w/ tires and rotors
    $400
    Boulder
  154. Carradice Super C saddlebag
    $50
  155. Bicycle Basket
    $20
    Longmont
  156. Mason x Hunt 4 Season tubeless disc rear wheel 700c Shimano freehub
    $120
    Boulder
  157. Quality Wheels RS505/DT R500 Disc Rear Wheel (700c) (12 x 142mm)
    $65
    Boulder
  158. Redshift Sports ShockStop PRO Suspension Handlebar Stem 90mm +/- 6 deg
    $150
    Boulder
  159. Whisky Parts No. 7 Carbon Seatpost 30.9 x 400mm straight
    $65
    Boulder
  160. Shimano HG-700 11 speed cassette 11x34 mint condition
    $35
    Boulder
  161. Shimano Ultegra HG800 11 speed cassette 11x34
    $60
    Boulder
  162. Silca Tattico Mini Pump
    $30
    Boulder
  163. Planet Bike Mini Versair Pump
    $15
    Boulder
  164. Banjo Brothers Bicycle Rack Top Bag very good condition
    $20
    Boulder
  165. Bell 2 bike rack
    $55
    Erie
  166. Kinetic indoor bike trainer
    $50
    Boulder
  167. Ceiling Bicycle hangars
    $10
    longmont
  168. Shimano Di2 Remote Climbing Shifter
    $40
    Boulder - Longmont - Denver
  169. LOOK A-Stem
    $85
    Boulder - Longmont - Denver
  170. Shimano Ultegra Rear Derailleur 11 Speed
    $35
    Boulder
  171. Deda Zero100 Team Stem- NEW!
    $55
    Boulder
  172. Fulcrum Racing 4, Disk brake, Tubeless ready - New
    $270
    Boulder - Denver
  173. Ortlieb Waterproof Bike Panniers
    $100
    Boulder
  174. 2022 SRAM GX Eagle 1275, 12 Speed Cassette, 10-52T
    $100
    Boulder
  175. SRAM XX1 Eagle DM DUB "Boost" Carbon Crankset
    $225
    Boulder
  176. Swift Catalyst Bag
    $125
  177. MAXXIS Rekon 27.5x2.6 mountain bike tires
    $10
    Longmont
  178. Feedback Sprint Repair Stand
    $175
    Boulder
  179. BMA Bike Jersey
    $25
    Louisville
  180. Adjustable BV Bike Kickstand
    $12
    South Boulder
  181. Guess silky small flower dress
    $3
    Boulder
  182. Brooks cambium C15 saddle, like new
    $100
    Boulder
  183. Sram Crankset X7 175mm BB30
    $100
    Boulder
  184. Sram Crankset Rival 22 175mm BB30 - $100
    $100
    Boulder
  185. KEO Carbon Pedals (look)
    $50
    Boulder
  186. Shimano Ultegra pedals (look)
    $50
    Boulder
  187. Water Bottle Carrier - Profile Design RML
    $30
    Boulder
  188. Thule Velo Vise Fork-Mount bike trays and cross bars
    $35
    Boulder
  189. Premium Gravel/Road Bike Parts
    $0
  190. Yakima Bike Rails
    $45
    Lafayette
  191. 2-Bike hitch mounted bike rack
    $50
    Lafayette
  192. Yakima Hitch Bike Rack
    $475
    Lafayette
  193. 2 Lolo bicycle handlebar rack mounts
    $30
    Boulder
  194. Thule 4 Bike Hitch Rack
    $100
  195. Used Trex black bicycle saddle seat
    $5
    Longmont
  196. Front MTN wheels great tires
    $10
    SE Boulder
  197. Dual battery ebike conversion kit
    $300
    Boulder
  198. WTB Silverado Saddle - Titanium
    $70
  199. Cannondale SI Spidering Plateau Chainring 32t - NEW
    $35
  200. SRAM GXP Carbon Crank - Direct Fit chainrings with spider
    $45
  201. Fork Up - Cannondale Lefty Wheel Mount
    $15
  202. Shimano Dura Ace RD-7700 9-Speed Rear Derailleur
    $30
  203. Lake Gravel shoesMTB shoes
    $150
    Longmont
  204. Shimano Gravel/MTB Shoes XC702 Wide
    $110
    Longmont
  205. Rocky Mounts Step Thru Frame Brace
    $15
  206. Serfas hardshell bike box
    $200
    Boulder
  207. Calfee carbon fiber disc road fork
    $60
    Boulder
  208. Continental 4Season 25mm Brand New Road Tire
    $50
    Superior
  209. Ritchey Carbon Breakaway Travel Bike
    $2,000
    Lafayette
  210. Complete Yakima roof rack system
    $950
    Boulder
  211. BOB Trailer
    $200
    Boulder
  212. SID Ultimate 120mm travel 44 rake-remote ready
    $675
    boulder
  213. Thumb throttle for ebike
    $10
    Louisville
  214. Rockymounts fork mount for Maverick Forks
    $20
    Boulder
  215. Emporia GC3 Pro Gravel HED Wheels
    $900
    Boulder
  216. Yakima hitch mount hanging bike rack with integrated cable lock
    $100
    Superior
  217. Stumpjumper Evo Alloy Frame S3
    $700
  218. Fulcrum Rapid Red 500 700c gravel wheelset
    $180
    Lafayette
  219. RockyMounts 2-bike Hitch Rack
    $120
  220. Thule 56" square crossbars
    $50
    Longmont
  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. Thule Big Mouth Bike Rack
    $150
  270. CycleOps Bike Trainer
    $85
    Erie
  271. Magnetic Indoor Bicycle Trainer with Resistance Control — Foldable, Or
    $50
  272. Shimano Dura Ace CS-7700 9 Speed Cassette
    $40
    Longmont
  273. Shimano Ultegra FC-6500/6503 172.5mm Crankset Double 53/39T 9-Speed
    $40
    Longmont