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Bicycles for sale in Boulder, CO

  1. Cr-Mo Balance brand bike. Free delivery.
    $121
    Greeley
  2. Frog 62 bike 24” 8-speed black
    $320
    Louisville
  3. Set (2) Vintage 1991 Scott Limited 18"/21'5 Mid/Taller Adults! RAD!!
    $230
    Metro Denver
  4. Condor Italia Road Bike w/Campagnolo Group+Wheelset 55cm frame
    $500
  5. 80s Vintage Bridgestone MB-3 Commuter~ 19" for 5'5-5'8 Tall ~TUNED UP!
    $60
    Metro Denver
  6. Giant 20" Youth Mountain Bike
    $100
    Boulder
  7. KHS Alite 150 Disc Hardtail Mountain Bike Excellent Condition Tuned
    $340
    Louisville
  8. Merckx EMX-5 Campagnolo Record 58cm Road Bike
    $1,500
    Louisville
  9. Kids / Boys Specialized Hotrock 24"
    $120
    Longmont
  10. 2020 Trek Checkpoint SL 7 58cm XL Carbon Gravel Bike AXS Power
    $3,295
    Boulder
  11. Quintana Roo TT Triathlon Race Bike - 55 cm
    $500
    SW Longmont
  12. Univega Via Carisma Hybrid / Comfort Bike Excellent Condition Tuned
    $260
    Louisville
  13. TREK Mountain Track MT60 Kids Hardtail Mountain Bike Excellent Tuned
    $180
    Louisville
  14. Schwinn Mesa GS Aluminum Frame Mountain Bike
    $250
    South Boulder
  15. Cannondale F300 Front Suspension Mountain Bike
    $300
    South Boulder
  16. Specialized Custom Single Speed Townie Bicycle
    $150
    South Boulder
  17. Giant SE Boulder Mountain Bike
    $125
    South Boulder
  18. Trek 7.2 FX Hybrid Aluminum Frame Mountain Bike
    $450
    South Boulder
  19. Trek 6500 Aluminum Frame Mountain Bike
    $300
    South Boulder
  20. Giant Rincon Mountain Bicycle
    $250
    South Boulder
  21. Huffy Nel Lusso Classic Cruiser Bicycle
    $125
    South Boulder
  22. Schwinn Ranger 2.4 FS Youth Bicycle
    $125
    South Boulder
  23. Vintage Trek 710 Road Bike - Excellent Condition
    $600
    South Boulder
  24. GT Outpost All Terra Vintage Mountain Bike
    $200
    South Boulder
  25. TREK 1000 SL Road Bike Excellent Condition Fully Serviced
    $480
    Louisville
  26. Vintage Italian Olmo Competition 54cm Bicycle - Campagnolo - Columbus
    $1,890
    Longmont
  27. LECTRIC brand e-bike
    $900
    Rollinsville
  28. Trek Bicycle - Navigator 300
    $125
    Boulder
  29. Trek Wasabi
    $200
    Longmont
  30. Electra cruiser
    $125
    Longmont
  31. Trek Emonda ALR 58cm XL Road Bike
    $1,950
    Boulder
  32. New Condition Specialized Globe-Needs Nothing-Gorgeous
    $300
    Boulder or, Denver Union Station
  33. Specialized HotRock 24 Kids Mountain Bike Excellent Condition Tuned
    $280
    Louisville
  34. Vintage Cruiser 1960s Roadmaster Canti Frame 19" for 5'5 and up! RARE
    $150
    Metro Denver
  35. Specialized Rockhopper Mtn Bike
    $200
    Nederland
  36. DiamondBack Edgewood Hybrid / Comfort Bike Excellent Condition Tuned
    $280
    Louisville
  37. 16” Kids Mountain Bike - 7-speed
    $60
    Boulder
  38. Fully Loaded Benno Boost Sport Cargo E-Bike
    $5,200
    Longmont
  39. 2019 SPOT RYVE 115
    $2,800
    Boulder
  40. Santa Cruz Tallboy V5
    $3,600
    Boulder
  41. Australian "Malvern Star Sprint 1.0" - 700c Road wheels/tires
    $150
    Longmont
  42. DiamondBack Lustre 2 Woman's Hybrid / Comfort Bike Like New Just Tuned
    $280
    Louisville
  43. Specialized HotRock 24 Kids Hardtail Mountain Bike Excellent Tuned
    $280
    Louisville
  44. Mongoose Ledge 2.1 mountain bike
    $40
    East Bridgewater
  45. 2023 Specialized Diverge Sport Carbon
    $2,400
    Boulder
  46. TREK MT 220, MT220 Kids Hardtail Mountain Bike Excellent Cond. Tuned
    $260
    Louisville
  47. TREK Navigator 300 Hybrid / Comfort Bike Excellent Condition Tuned
    $300
    Louisville
  48. Specialized Stumpjumper Pro S3 (Medium)
    $4,999
    Boulder
  49. Fuji Bicycle
    $100
    Longmont
  50. DiamondBack Grind PRO BMX Bike Excellent Condition Fully Serviced
    $160
    Louisville
  51. ***Priority Brilliant L Train***
    $500
    Longmont
  52. Trek Evo EX5 Mountain Bike
    $399
    Boulder
  53. Breezer Villager Hybrid / Comfort Bike Excellent Cond. Fully Serviced
    $380
    Louisville
  54. XXL 2022 Specialized S-Works Stumpjumper EVO carbon 29er ($12K new)
    $5,250
    South Boulder
  55. 2022 Specialized Riprock 24” Kids Mountain Bike - Fat tires, UV-Lilac
    $450
    Longmont
  56. Cervelo R3 Carbon Disc Road Bike 51cm Small
    $2,995
    Boulder
  57. LARGE all carbon Ridley X-Fire cyclocross bike with SRAM RED
    $720
    South Boulder
  58. Spawn Yama Jama 20"
    $850
    Boulder
  59. Huffy Purple Lavender Girls Youth MTB Bike Ready2Ride! 24" Wheel Size
    $60
    Gunbarrel
  60. TREK 3500 Alpha Aluminum MTB Mountain Bike Matte Black Ready2Ride! 18"
    $260
    Gunbarrel
  61. Vintage Crate Orange Schwinn Predator Pro Racing BMX Bike 21.5"
    $100
    Gunbarrel
  62. Giant Trance 29 2
    $1,375
    Longmont
  63. TREK Mystic 20 Kids / Girls Bike Excellent Condition Fully Serviced
    $100
    Louisville
  64. Factor Vista Carbon Road / Gravel Bike 58cm XL
    $3,995
    Boulder
  65. GT Bullet Kids Mountain Bike Excellent Condition Fully Serviced
    $180
    Louisville
  66. Specialized Camber Grom 24”-26”
    $900
    Niwot
  67. Raleigh Alysa 1 Woman's Hybrid / Gravel Bike Excellent Condition Tuned
    $280
    Louisville
  68. 2009 Jamis Sonik track bike, 51cm
    $500
    Longmont
  69. Quintana Roo PRSix Carbon TT Triathlon Bike Small 52cm
    $1,980
    Boulder
  70. Rans V-Rex Recumbent, Medium
    $395
    Longmont
  71. TREK Conduit+ e-Bike
    $550
    Longmont
  72. SPECIALIZED BIKE
    $140
    BOULDER
  73. SPECIALIZED MOUNTAIN BIKE
    $150
    BOULDER
  74. Specialized Road Bike + Trainer + Accessories
    $475
    Aurora
  75. 2006 Yamaha Vino Classic 49cc Scooter
    $1,800
    Erie
  76. 59cm 1997 Serotta Custom Ti - Dura Ace Spec Titanium Road Bike
    $600
    Erie
  77. Kent Glendale 7 speed
    $130
    Longmont
  78. Excellent Vintage 90s Univega Hybrid Cruiser
    $300
    Louisville
  79. FLX E-Bike Large frame
    $850
    Boulder
  80. Kona Cinder Cone Suspension Mountain Bicycle
    $300
    South Boulder
  81. Great hybrid bike for sale
    $150
    Longmont
  82. REI CTY 2.1 Bike (hydraulic disc brakes)
    $700
    Boulder
  83. RAD Power Bike Step Thru
    $550
    Boulder
  84. Giant XTC1 - Like new vintage mountain bike
    $700
  85. Ibis Mojo HD4
    $2,900
    South Boulder
  86. Specialized S works CX M4 56cm
    $750
    Boulder
  87. Haro Thread One Dirt jumper
    $899
    Boulder
  88. Folding Electric Bike
    $500
    Broomfield
  89. 2013 Specialized Crux S-Works 56cm + Extra Wheelset
    $1,450
    Boulder
  90. Quadrini Folding Electric Bike + extras
    $1,000
    Boulder
  91. Trek Wahoo Kid's 26"
    $300
    Erie
  92. Custom OG Cyclocross Bike - small + spare wheels
    $1,200
    Boulder
  93. 2018 Santa Cruz Bronson XO1
    $2,200
    Superior
  94. Cannondale Synapse Carbon 5 105 54cm
    $950
    Longmont (SW)
  95. 2012 Trek Remedy 8 with Upgrades
    $800
    North Boulder
  96. Nukeproof Scout 275 Pro - Medium
    $1,900
    Longmont
  97. Specialized Road Bike - Women's Small
    $250
    South Boulder
  98. RadRunner Plus EBike – Upgraded Hydraulic Brakes
    $899
    Boulder
  99. Kid’s Specialized Rip Rock Disc 20”
    $250
    Longmont
  100. Diamondback Clutch 2 Mountain Bike (Medium) - Great Condition!
    $1,000
    Boulder
  101. SANTANA TEAM Ti-700 Tandem Bicycle
    $4,500
    Boulder
  102. Salsa Spearfish Carbon
    $1,600
    Nederland
  103. Cannondale SuperSix EVO HiMod Disc 56cm
    $1,950
  104. Gary Fisher HiFi Pro
    $500
    Boulder
  105. Trek 1420 Roadbike
    $125
    Estes Park
  106. Colnago V1-R
    $4,750
    S Boulder
  107. GIANT Defy
    $300
    Erie
  108. Diamondback Maravista Hybrid Aluminum Bicycle
    $200
    South Boulder
  109. Specialized rock hopper XC FSR
    $180
    Boulder
  110. Specialized Sirrus Sport Road Bike
    $240
    North Boulder
  111. REDUCED - Like New Carbon Fiber Cannondale Jekyl
    $1,200
    Boulder, co
  112. 51 cm Cervelo Aspero GRX RX815 Di2
    $4,800
    Nederland
  113. Leader LD-720 TT Road bike
    $400
    Boulder
  114. Marin Hawk Hill - Mens Mountain Bike
    $1,800
    Longmont
  115. TREK Navigator 200 Hybrid / Comfort Bike Excellent Cond. Just Tuned
    $280
    Louisville
  116. Trek 620
    $300
    Louisville
  117. 2018 YT Jeffsy 27 AL Comp - Excellently Maintained + Upgrades!
    $1,742
    Lafayette
  118. Dura Ace-2005 Specialized Dolce Comp
    $500
    South Boulder
  119. Bulls E-bike. Bosch 28mph
    $2,400
    Longmont
  120. X Small Specialized Carbon Ruby Elite road bike
    $290
    north Boulder
  121. Novara Buzz single speed
    $100
    Boulder
  122. Specialized Hardrock Mountain Bike
    $275
    South Boulder
  123. Kuota Kaliper Triathlon and 404 Zipp Wheels Bike 2010-2012
    $1,450
    Boulder
  124. 26" Electra Hawaii Bike
    $80
    Boulder
  125. Gary Fisher Tassajara GS Mountain Bike
    $350
    South Boulder
  126. Road Bike Trade for Cargo Bike.
    $1
    Longmont
  127. Schwinn Cruiser
    $240
    Nederland
  128. Bianchi SL Lite Alloy Reparto Corse 59cm
    $850
    Berthoud
  129. Women's Kona Dew 8 speed!
    $350
    Boulder
  130. Calfee Tetra Pro - Dura Ace
    $1,200
    Boulder
  131. Trek Neko Hybrid WSD 18 frame
    $199
    Lafayette
  132. Gary Fisher Tassajara GS Mountain Bike
    $350
    South Boulder
  133. Santana Fusion Tandem perfect for gravel
    $1,500
    Boulder
  134. Kids striker balance bike
    $65
    erie
  135. K2 Cheyenne Sport Hardtail Mountain Bike Excellent Condition Tuned
    $300
    Louisville
  136. Bike (NEXT 4.0)
    $20
    Lafayette
  137. E bike
    $1,200
    Arvada
  138. 16 inch Cleary Hedge Hog kids bike
    $220
    Boulder
  139. GT Outpost Trail Mountain Bike Excellent Condition Just Tuned
    $240
    Louisville
  140. Cervelo R3 Ultegra Di2 Road Bike 48cm 2017
    $1,500
    Boulder
  141. Spot Acme commuter bike
    $1,050
    South Boulder
  142. Devinci Newton with integrated lights L
    $550
    Gunbarrel
  143. LaPierre Zesty AM 327
    $1,400
    Broomfield
  144. WOODEN BALANCE BIKE
    $45
    BOULDER
  145. Custom Fat eBike
    $1,500
    Louisville
  146. TREK MT 60, MT60 Kids Hardtail Mountain Bike Excellent Condition Tuned
    $180
    Louisville
  147. Custom Scott Spark Jr. 24in Full Suspension Bike
    $450
    Gunbarrel
  148. Women's (S) Cannondale Habit Carbon SE
    $2,300
    Boulder
  149. KALKHOFF ELECTRIC BIKE
    $800
    Loveland
  150. Pivot Mach 5.5
    $2,650
    Superior
  151. Cervelo R3 XL Sram Red
    $900
    Whittier
  152. Trek Mountain Track 800 Mountain Bike
    $200
    South Boulder
  153. GT Aggressor 2.0 Aluminum Frame Mountain Bike
    $250
    South Boulder
  154. Bianchi Limited vintage Italian road racing bicycle
    $350
  155. Specialized Hardrock
    $250
    Longmont
  156. 2017 Trek X-Caliber 9. 17.5
    $750
    Boulder
  157. classic gangl steel road bike
    $900
    Boulder
  158. Giant Sedona.
    $105
    Greeley
  159. Ghost Kato FS 7 Mountain Bike
    $950
    Boulder
  160. 2012 Trek Madone 3.1
    $1,200
    Longmont
  161. Litespeed Vela Road Bike - Very light!
    $400
    Longmont
  162. Giant Talon 2 27.5
    $400
    Lafayette
  163. LiteSpeed Vortex
    $900
    Boulder
  164. Diamondback Haanjo Trail Gravel Bike 56cm
    $1,600
    Lafayette
  165. Cervelo P Series TT Bike
    $11,000
    Boulder
  166. Salsa fargo-xs
    $2,800
    Longmont
  167. Liv Lust Advanced 2 (2015) - Small
    $1,100
    Louisville
  168. Cervelo P Series 54cm Time Trial Bike
    $4,500
    Boulder
  169. Ibis Hakka MX 2X Di2 + Power
    $3,250
    Lafayette
  170. Univega Modo Vivere. 50". Campy and Columbus.
    $275
    Greeley
  171. JEEP Hardtail Mountain Bike Excellent Condition
    $200
    Louisville
  172. Raleigh Rush Hour fixie. 22"
    $169
    Greeley
  173. Surly Long Haul Trucker 52cm
    $650
    Niwot
  174. 1991 Trek 1420. Limited free delivery.
    $295
    Greeley
  175. GIANT Boulder SE Hardtail Mountain Bike Excellent Condition
    $280
    Louisville
  176. Strider Bike
    $50
    Longmont/Boulder
  177. Fuji Dynamite 24CP kid's mountain bike
    $100
    University Hill (Boulder)
  178. Specialized Stumpjumper
    $400
    Boulder
  179. Vintage 1973 Schwinn Girls Varsity
    $200
    LONGMONT
  180. 2020 Tarmac SL6 Disc Sport 58cm Upgraded
    $2,500
    Boulder
  181. TREK 1000C Road Bike Excellent Condition
    $480
    Louisville
  182. Rockhopper Comp Metallic White/Satin Black Bikehand™ Bike Stand incl.
    $600
    Boulder
  183. Bianchi Vigorelli
    $780
    Longmont
  184. RANS Rocket recumbent bicycle
    $225
    Erie
  185. 2 60cm Cannondale SuperSix EVO high mod carbon Frame UCI Road Rim brak
    $240
  186. Cannondale Cyclecross Ultra
    $250
    Berthoud
  187. Cervelo R3 Disc Ultegra 56 CM
    $2,500
    Louisville
  188. SCHWINN MESA GS Hardtail Mountain Bike Excellent Condition just tuned
    $280
    Louisville
  189. Felt B2 Triathlon Road Bike
    $675
    Longmont
  190. Ready to Ride Vintage 1976 Trek Bike
    $20
    Lafayette
  191. Two E bikes for sale. 100 each. Teen/ pre teen size. Kalkhoff Urban
    $100
    Niwot
  192. Trek Women's road bike PRICE SLASHED!
    $1,095
  193. Fuji Eddy Mountain Bicycle
    $200
    South Boulder
  194. Schwinn Mesa LE Mountain Bike
    $200
    South Boulder
  195. Diamondback DBR Apex Suspension Mountain Bike
    $400
    South Boulder
  196. Kids Diamond Back Road Bike
    $100
    arvada
  197. Raleigh M-400 Hardtail Mountain Bike Excellent Condition
    $300
    Louisville
  198. Men’s and women’s 21 speed
    $280
  199. Trailcraft Pineridge 24
    $1,500
    Longmont
  200. Cervelo Caledonia frame, fork, stem, bars, seatpost and BB
    $1,200
    Boulder
  201. 2009 Redline MX-20 Retro Reissue BMX
    $200
    Boulder
  202. Serotta Meivici SE
    $1,950
    Boulder
  203. Argon 18 Radon Road Bike Medium
    $700
  204. Corsa R-Fourteen Road Bike Excellent Condition
    $300
    Louisville
  205. Womens Trek Pilot carbon road bike
    $450
    Boulder
  206. Kids starter bike
    $75
    Boulder
  207. Specialized 2021 Turbo Levo SL
    $4,500
    Boulder
  208. Girls Trek MTB bike
    $85
    Boulder
  209. Fuji Nevada Mountain Bike
    $200
    South Boulder
  210. 2022 Marin El Roy Hardtail
    $950
  211. 2021 Specialized Stumpjumper S-Works S3
    $5,500
    Boulder
  212. TREK Navigator 400 Woman's Hybrid / Comfort Bike Like New Condition
    $340
    Louisville
  213. Haro PreWheelz 12” Balance Bike
    $40
    Longmont
  214. TREK 4-Series (4300) Hardtail Mountain Bike Excellent Condition
    $300
    Louisville
  215. Vintage Trek Series 600 Road Bike
    $400
    South Boulder
  216. Awesome 20-inch Specialized Hotrock
    $200
    Boulder
  217. Jamis Helix A2 Mountain Bike
    $250
    Gunbarrel
  218. Niner Jet full XTR - Large Mountain Bike
    $2,200
    Boulder
  219. Trek 7000 Hardtail Mountain Bike
    $275
    Longmont
  220. Giant Cypress DX Hybrid/Upright Step-Through Bike
    $300
    Longmont
  221. Trek 7300 Hybrid/Upright Step-Through Bike
    $300
    Longmont
  222. Cinelli Vigorelli Track Bike with Carbon Fork (large frame)
    $2,250
  223. Schwinn Frontier Mountain Bike
    $125
    South Boulder
  224. Vintage Miele Road Bike
    $200
    Boulder
  225. Specialized Langster Track Bike, 58cm
    $1,500
    Longmont
  226. GT Stomper
    $125
    Lafayette
  227. GIANT MTX 225, MTX225 Kids Mountain Bike Excellent Condition
    $240
    Louisville
  228. KHS ZACA
    $275
  229. Kona Jake the Snake
    $250
    Boulder
  230. 24" Kids Mountain Bike: Cube Acid 240 SL
    $315
    boulder