• Hand Built tig-welded high-tensile steel, "UrbanComfort" design, bar-spin clearance with no toe overlap
  • Unicrown, Threadless, 28.6mm, fender-eyelet
  • Internal rear brake cable routing
  • 2 sets water bottle braze-ons
  • Rear rack braze-ons
  • Decals protected by clear-coat


  • Rear Derailleur: Shimano Altus M310, 7S
  • Shifters: Shimano Revoshift (twist) 21S, RS35
  • Crank: Aluminum alloy 170mm x 46T x 3/32", w/alloy chainwheel guard + ChainKeeper
  • Chain: KMC Z-series 1/2 x 3/32"
  • BB: Sealed Cartridge
  • Freewheel: Shimano Tourney 500, 7S MegaRange 14-34T


  • Rims: Retrospec aluminum double-wall 32H, 40mm deep-V section, precision machined brake tracks
  • Hubs: Aluminum alloy ball-bearing, 32H, bolt-on
  • Spokes: 14G Stainless steel
  • Tires: Retrospec 700 x 32C all-season, P/V valves


  • Headset: 1 1/8" (28.6mm) steel, Threadless
  • Brakes: Aluminum alloy dual-pivot side-pull calipers & aluminum brake levers
  • Handlebars: Aluminum Alloy 570mm Wide x 30mm Rise, 25.4
  • Grips: Retrospec UrbanComfort Kraton 125mm length
  • Stem: Aluminum alloy 4-bolt Threadless, 80mm extension x 7⁰ rise x 36mm rise, 25.4 handlebar clamp, 28.6 steerer
  • Saddle: Retrospec Urban2
  • Seatpost: Aluminum Alloy Seat Post 25.4 x 300mm with Micro Adjust head
  • Seatpost Clamp: Aluminum alloy CNC precision 28.6mm
  • Pedals: Low-Profile Platform, Reinforced Nylon resin, 9/16"
Recommended Weight Limit: 250 LBS

Retrospec Mantra 7 Gunmetal Urban Commuter

Color: gunmetal
  • XS

    Frame Size: 49CM

    Rider Height: 5'2"-5'6"

    Standover Height: 31"



    Frame Size: 52CM

    Rider Height: 5'6"-5'9"

    Standover Height: 32.5"



    Frame Size: 55CM

    Rider Height: 5'9"-6'

    Standover Height: 33.5"



    Frame Size: 58CM

    Rider Height: 6'-6'3"

    Standover Height: 34"



    Frame Size: 61CM

    Rider Height: 6'3"+

    Standover Height: 34.5"

Inside the antique Market
(enter from the main entrance, go to the basement)

Cambridge Used Bicycles

Cambridge Antique Market Building (in basement)
201 Monsignor O'Brien Hwy
Cambridge, MA 02141

  • Yelp Social Icon
  • Facebook Classic

  Virtual hours due to Covid-19

    Tue - Fri   12pm - 6pm


Call us


Email Us

EVRI, LLC all rights reserved 2020. 

Building temporarily

closed due to

covid-19 restrictions