Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Crimson V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Crimson V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Crimson V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Crimson V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Crimson V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Crimson V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Azure Blue V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Azure Blue V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Azure Blue V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Azure Blue V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Azure Blue V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Azure Blue V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Olive Drab V3 V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Olive Drab V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Olive Drab V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Olive Drab V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Olive Drab V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Olive Drab V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Black V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Black V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Black V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Black V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Black V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Black V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Gunmetal V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Gunmetal V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Gunmetal V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Gunmetal V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Gunmetal V3
Retrospec Mantra Fixed-Gear / Single-Speed Bike | Matte Gunmetal V3

Mantra Fixed-Gear / Single-Speed Bike


$329.99

Traditional Retail Price: $399.99

44 reviews
Matte Crimson
Matte Azure Blue
Matte Black
Matte Gunmetal
Matte Olive Drab
? Sizing Help
Frame Size:
43cm
Rider Height:
4'9"-5'1"
Standover Height:
30.5"
Frame Size:
49cm
Rider Height:
5'2"-5'5"
Standover Height:
31"
Frame Size:
53cm
Rider Height:
5'6"-5'8"
Standover Height:
32.5"
Frame Size:
57cm
Rider Height:
5'9"-5'11"
Standover Height:
33.5"
Frame Size:
61cm
Rider Height:
6'+
Standover Height:
35"
Free Shipping Over $35
50 Day Returns

Mantra is our premium fixie/single-speed. Quick response dual braking, sealed bearing hubs, and dripping with style, Mantra is your go-to for your every commuting, cruising, zipping, coasting and speeding need.

Mantra’s high-tensile strength steel diamond frame is ideal for urban riding. Sealed bearing hubs ensure a smoother ride and longer lasting wheels. Equipped with a flip-flop hub, Kenda commuter tires, double-wall deep-V rims, machined braking surface, dependable KMC chain, barspin clearance, horizontal dropouts, and more, Mantra is ready to ride and built to last.

Mantra comes standard with sealed cartridge bearing hubs to keep your bike clean and healthy. Less dampness, water, and grime can get into the delicate parts of your bike when the hubs are sealed. This means less required maintenance and a longer living bicycle.

Mantra comes installed on the single-speed side. This is a bike you can ride regularly and quickly and easily transform into a fixed-gear whenever you like.

We have very high standards. Every single element that goes anywhere near our bikes undergoes serious scrutiny. The Kenda commuter tires we pick have a unique tread with water dispersion grooves. There is more surface area on these tires and water travels through the channels on the tire. This means you have more traction and better grip on the road but also minimal resistance. The double-wall super deep-V Star rims with a machined braking surface and the always dependable KMC chain ensure a smooth ride.

We strongly suggest that you take your bike to a professional bicycle mechanic to be built and/or checked out to ensure that the cog and lockring are tightened, the brakes adjusted, and the wheels trued.

Frameset:

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

Drivetrain:

  • Crank: Mantra Forged Aluminum Alloy 170mm x 46T x1/8"
  • Chain: KMC C1 1/2 x 1/8"
  • BB: Sealed Cartridge
  • Freewheel: 16T x 1/8"

Wheelset:

  • 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
  • Retrospec 700 x 28C all-season, P/V valves

Components:

  • Headset: 1 1/8" (28.6mm) steel, Threadless
  • Brakes: Aluminum alloy dual-pivot side-pull calipers & aluminum brake levers
  • Handlebars: Aluminum Alloy 520mm 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

A. Rider Height

B. Inseam

C. Top Tube

Measuring Inseam

Inseam is the most important metric to consider when deciding on bike size. In order to take this measurement properly, follow these guidelines:

  1. Stand upright with your feet 6-8" apart.
  2. Using a tape measure or tailor tape, measure from the bottom of your foot to the top of the inside of your leg.
  3. Compare your inseam measurement to the standover height of the bike. You should have about an inch of space between your body and the top tube.

Additional Sizing Info

Size

43cm

49cm

53cm

57cm

60cm

Height Range

4'9"-5'1"

5'2"-5'5"

5'6"-5'8"

5'9"-5'11"

6'+

Standover Height

30.5"

31"

32.5"

33.5"

35"

Mantra’s high-tensile strength steel diamond frame is ideal for urban riding. Sealed bearing hubs ensure a smoother ride and longer lasting wheels. Equipped with a flip-flop hub, Kenda commuter tires, double-wall deep-V rims, machined braking surface, dependable KMC chain, barspin clearance, horizontal dropouts, and more, Mantra is ready to ride and built to last.

Mantra comes standard with sealed cartridge bearing hubs to keep your bike clean and healthy. Less dampness, water, and grime can get into the delicate parts of your bike when the hubs are sealed. This means less required maintenance and a longer living bicycle.

Mantra comes installed on the single-speed side. This is a bike you can ride regularly and quickly and easily transform into a fixed-gear whenever you like.

We have very high standards. Every single element that goes anywhere near our bikes undergoes serious scrutiny. The Kenda commuter tires we pick have a unique tread with water dispersion grooves. There is more surface area on these tires and water travels through the channels on the tire. This means you have more traction and better grip on the road but also minimal resistance. The double-wall super deep-V Star rims with a machined braking surface and the always dependable KMC chain ensure a smooth ride.

We strongly suggest that you take your bike to a professional bicycle mechanic to be built and/or checked out to ensure that the cog and lockring are tightened, the brakes adjusted, and the wheels trued.

Frameset:

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

Drivetrain:

  • Crank: Mantra Forged Aluminum Alloy 170mm x 46T x1/8"
  • Chain: KMC C1 1/2 x 1/8"
  • BB: Sealed Cartridge
  • Freewheel: 16T x 1/8"

Wheelset:

  • 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
  • Retrospec 700 x 28C all-season, P/V valves

Components:

  • Headset: 1 1/8" (28.6mm) steel, Threadless
  • Brakes: Aluminum alloy dual-pivot side-pull calipers & aluminum brake levers
  • Handlebars: Aluminum Alloy 520mm 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

A. Rider Height

B. Inseam

C. Top Tube

Measuring Inseam

Inseam is the most important metric to consider when deciding on bike size. In order to take this measurement properly, follow these guidelines:

  1. Stand upright with your feet 6-8" apart.
  2. Using a tape measure or tailor tape, measure from the bottom of your foot to the top of the inside of your leg.
  3. Compare your inseam measurement to the standover height of the bike. You should have about an inch of space between your body and the top tube.

You may also like

Customer Reviews

Customer Reviews
4.7 Based on 44 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
DW
05/27/2020
Dominiqic W.
United States United States
Looks Amazing

This was my first purchase from Retrospec and I am beyond pleased. The bike arrived in great condition and was fairly easy to assemble. A video of assembly would work better than the instructions.

Was this review helpful?  0    0
MT
05/25/2020
Mallory T.
United States United States
First Bike!

This is the first bike I have bought in my adulthood. I was nervous because I didn't know if it was going to be the right size but I am 5'7 and the medium was perfect, just had to lower the seat down. I built it on my own but the front brakes were a little janky. After taking it into a shop to get tuned up I could not stop riding this bike! I love it!! Such a smooth ride that helps me get in and out of the city. I take it to work and school almost everyday.

Was this review helpful?  0    0
TH
05/20/2020
Tyler H.
United States United States
Great bike

So far, so good with the Mantra. Bike came packaged very well and putting it together was pretty straight forward. I’ve had a blast riding around on it so far.

Was this review helpful?  0    0
NB
05/20/2020
Nate B.
United States United States
Bike is well service is a bit to be desired

I ordered this bike and I was sent the wrong color. I emailed the team and they responded asking what color I got instead but offered nothing for the mistake. I did see continued updates to their social media for several days after my response so I feel like my request for further support was simply ignored. Luckily the bike was my second choice for color and it was the right size so it wasn't the end of the world. The bike seems to be put together quickly but I'm quickly finding almost everything needs to be adjusted just a little bit. Overall I'm more disappointed in the customer service than having to adjust items on the bike. Really making me reconsider future purchases from this company.

Was this review helpful?  0    0
LS
05/15/2020
Leslie S.
United States United States
Superb gift!

I bought the mantra for my mom and she had ridden it every day since. Thank you for making her Mother’s Day amazing!

Was this review helpful?  0    0