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Retrospec Mantra Fixed-Gear / Single-Speed V3

Retrospec Mantra Fixed-Gear / Single-Speed V3
  • Color: Matte Black
  • Color: Olive Drab
  • Color: Matte Gunmetal
  • Color: Matte Crimson
  • Color: Matte Azure Blue
Please select options
This item is temporarily out of stock - call for availability. Rialto - (909) 875-7310 Redlands - (909) 792-3399


The Mantra is one of Retrospec’s most popular models for riders that want a great fixed-gear or single-speed bike. Riders love it because it’s durable, versatile, and affordable. Oh, and it looks darn good, too.

The Mantra is both a single-speed and a fixed-gear bike. It comes set up as a single speed, but thanks to the flip-flop rear hub it can be easily changed into a fixed-gear bike.

While Retrospec sells similar models, the Mantra is their premium version that goes above and beyond in order to provide you with a high-quality ride that you’ll soon be obsessed with. This bike is so fun and stylish that you’ll be itching to take it out for a spin as often as you can.

Take a look at some of the great features you’ll get with the Mantra.

With only 1 speed, the Mantra is virtually maintenance free. Just make sure your tires have air and you’re good to go!

The sealed cartridge bearing hubs will protect your bike against the elements and require less maintenance so your bike lives a long, happy life.

The dual braking system provides plenty of controlled stopping power when you need it for a safe, stress-free ride.

Fast-rolling, durable 700 x 28c tires give you plenty of traction without slowing you down so you’re able to dart around the city rain or shine.

For the serious commuters out there, the Mantra has mounts for a rear rack and two water bottle cages for extra storage capacity.

Navigating tight city spaces can be difficult with wider handlebars, so the Mantra comes stocked with a narrower 520mm bar that makes getting around in traffic (or in your apartment) much easier.

Whether this is your first single-speed / fixed-gear bike or you’re a seasoned rider who appreciates a great value, you’ll be impressed with the Mantra and it’ll become a fun part of your daily routine.

SizeHeight RangeStandover Height
43cm 4'9"-5'1" 30.5"
49cm 5'2"-5'5" 31"
53cm 5'6"-5'8" 32.5
57cm 5'9"-5'11" 33.5"
60cm 6'+ 35"

flip fop rear hub

The flip flop rear hub has a fixed gear cog on one side and a single speed cog on the freewheel side. This allows riders to easily change their bike from a single speed to a fixed gear bike and vice versa.

Retrospec mantra comes with rear rack mounts and internal cable routing

When was the last time you saw a bike at this price with internal cable routing? Interna; routing helps keep the cables safe and secured while also adding to the clean look of this frame.

There's also mounts for a rear rack if you want to carry more gear on your commute. There's even fender mounts for all-weather commuting.


Frame Hand Built tig-welded high-tensile steel, "UrbanComfort" design
Headset 1 1/8" (28.6mm) steel, Threadless
Rims/Wheels Retrospec aluminum double-wall 32H, 40mm deep-V section, precision machined brake tracks
Hubs Retrospec large-flange aluminum alloy, sealed cartridge bearings, 32H, rear flip-flop, bolt-on
Spokes 14G Stainless steel
Tires Retrospec 700 x 28C all-season, P/V valves
Crankset Mantra Forged Aluminum Alloy 170mm x 46T x1/8"
Bottom Bracket Sealed Cartridge
Chain KMC C1 1/2 x 1/8"
Handlebars Aluminum Alloy 520mm Wide x 30mm Rise, 25.4
Tape/Grips Retrospec UrbanComfort Kraton 125mm length
Stem Aluminum alloy 4-bolt Threadless, 80mm extension x 7° rise x 36mm rise, 25.4 handlebar clamp, 28.6 steerer
Brakes Aluminum alloy dual-pivot side-pull calipers & aluminum brake levers
Pedals Low-Profile Platform, Reinforced Nylon resin, 9/16"
Saddle Retrospec Urban2
Seat Post Aluminum Alloy Seat Post 25.4 x 300mm with Micro Adjust head
Seat Binder Aluminum alloy CNC precision 28.6mm
Accessories & Extras Internal rear brake cable routings, 2 sets water bottle braze-ons, Rear rack braze-ons, Decals protected by clear-coat

* Subject to change without notice.

Part Numbers

Option MPN Store SKU
Matte Black / XS - 43 cm
Matte Black / S - 49 cm 3666 MAN372999649
Matte Black / M - 53 cm 3667 MAN374554933
Matte Black / L - 57 cm 3668 MAN376679547
Olive Drab / XS - 43 cm 3680 MAN367558703
Olive Drab / S - 49 cm 3681 MAN353827779
Olive Drab / M - 53 cm 3682 MAN25793570M
Olive Drab / L - 57 cm
Matte Gunmetal / XS - 43 cm
Matte Gunmetal / S - 49 cm
Matte Gunmetal / M - 53 cm 3677 MAN29134642M
Matte Gunmetal / L - 57 cm 3678 MAN392590647
Matte Crimson / XS - 43 cm
Matte Crimson / S - 49 cm 3671 MAN381044229
Matte Crimson / M - 53 cm
Matte Crimson / L - 57 cm 3673 MAN386673567
Matte Azure Blue / XS - 43 cm
Matte Azure Blue / S - 49 cm
Matte Azure Blue / M - 53 cm 3662 MAN358116473
Matte Azure Blue / L - 57 cm