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.
- Frame: Hand Built Tig-Welded "UrbanComfort" design high-tensile strength steel frame and fork with bar spin clearance, horizontal drop outs, and no toe overlap
- Brakes: Alloy Front and Rear Promax Radius Lever Brakes
- Tires: Kenda Commuter Tires 700x25c
- Fork: Tig Welded 1 1/8" Threadless, 45º rake
- Handlebar: Lightweight Alloy Riser Bar 520mm, 25.4
- Stem: 90mm Promax Alloy
- Crank: Alloy Forged 3-piece 165mm arms, 46T
- Bottom Bracket: Sealed Cartridge Bearing NECO
- Pedals: VP Freestyle Pedals
- Rims: 43mm Stars Super Deep-V Rims with Machined Braking Surface and Stainless Steel Spokes
- Hub Rear: Retrospec Sealed Cartridge Bearing Flip-Flop Hub with 16T Fixed-Gear and Freewheel
- Hub Front: Retrospec Sealed Cartridge Bearing
- Seat Post Clamp: Alloy Integrated
- Seatpost: Alloy 25.4
- Grips: Kraton Rubber
- Recommended Weight Limit: 250 LBS
A. Rider Height
B. Inseam
C. Top Tube
Measuring Inseam
- Stand upright with your feet 6-8" apart.
- Using a tape measure or tailor tape, measure from the bottom of your foot to the top of the inside of your leg.
- 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"-5'2"
5'2"-5'6"
5'6"-5'9"
5'9"-6'
6'+
Standover Height
30.5"
31"
32.5"
33.5"
35"
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Customer Reviews
- Reviews
- Questions
I loooove this bike!! I ride it everyday. 10/10
I can't complement this bike enough, was nervous about ordering something online but it turned out to be my greatest online purchase ever! - the bike arrived quickly, was packed well, and is exactly as advertised. This bike is awesome to ride , very agile! The quality is very good, I'm a bigger/stronger guy (6'3" 230#'s super handsome) and the crank does not creak at all even smashing up hill...very impressed Retrospec! I ordered the 61 cm, and it fits great. I'm 6'3" with very long legs and had no issue, seat post is somewhere in the mid height range. I will definitely be ordering the drome soon!
I currently own a Mantra V2. I marvel at the quality of this bike. This is by far the best fixie I have ever ridden. The thing rides so well. It has a quality feel. Very well put together. I like it so well I am now waiting for my new Amok V3 8 speed to arrive. Broadening my riding horizons so to speak. These bicycles are so well engineered yet so simplistic in design. Retrospec, you have earned my loyalty. My new number 1 bicycle brand.
Really nice! Best fixed gear I've ever owned! 10/10
Wow these bikes looked even cooler in person. I got a coral and midnight blue one for me and my girlfriend. It was so easy to assemble with the tools provided. We got the xs and s sizes since my gf is 5'2 and I'm 5'5. These were perfect for our height.