6KU Fixie Bike

Looking for a good bike at a low price? Then the 6KU Fixie is what you’re looking for. It’s the dream single-speed bike that is well-built, sturdy, and ideal for short commutes. Buy it, ride it, and we promise you’ll have a smile on your face. There is no other fixie out there like the 6KU.  

All 6KU Fixies come with a $30 value of FREE tools included with every bike purchase.

  • Comfortable Steel Frame
  • Reliable Front and Rear Brakes
  • Fixed or Freewheel with a Flip-Flop Hub
  • Easy Maintenance and Upkeep
  • 30-Day Hassle-Free Return Policy
What's Included
Find My Size
How to Build
What's Included
Find My Size

Full Geometry Chart


4'11" - 5'2"
5'2" - 5'5"
5'5" - 5'9"
5'9" - 6'1"
6'1" - 6'5"
A | Top Tube 483 510 535 560 580
B | Seat Tube C-T 420 510 540 570 600
C | Stand Over 722 762 787 815 850
D | Stack 492 500 520 551 574
E | Reach 372 383 395 397 405
F | Head Tube Angle 73° 73° 73° 73° 73°
G | Seat Tube Angle 74° 74° 73° 73° 72°
H | Fork Rake 38 37 37 37 37
I | B.B. Drop 60 60 60 60 60
J | Wheelbase 961 971 972 980 992
K | Chain Stay 400 400 400 400 400
L | Head Tube 85 90 105 135 160
How to Build

Customer Reviews

Based on 973 reviews
Ramis Nazir
Good bike for the price

Bike is great, only thing I took a star off for was that the manual in the box isn’t specific to the bike. It would have been better to provide a link in the manual to the assembly video on their website, which is specific to the bike and much easier to follow.

Tyler Edrington
No Response for Missing Delivery

UPS reported that my bike delivered, but it never was. It's impossible to contact anyone at 6KU. I sent emails a week ago with no response, and the contact # is not active.

Angelho Diaz
What a good/smart choice

Beautiful bike. Just the main weel stick is too short and have to add an adapter for a better body position. I'm lucky to have found u guys!

Jason Ellyson
Great bike

For $249 you can’t go wrong! This is my first
fixie/single speed, I come mainly from a mountain bike background. This bike is beautiful in it’s simplicity, but it also has nice lines and good style for a very cost effective bike. I built it out of the box which was fairly simple and a nice touch for people who aren’t too familiar with building bikes. The only thing I had to do to it was adjust the brakes. There was a lot of play in the brake levers so I took out the slack in the lines and they became a lot more responsive. I have worked on my own bikes for many years and was a bike mechanic for a few years too, if you aren’t comfortable doing this work on your own, take it to your local bike shop for help. I ordered new pedals because I wasn’t wild about the feel of the stock ones. I also put in new grips but that was purely cosmetic. All in all this is a great bike and I would recommend to anyone looking for a fun urban rider. I’ve put some miles on it and it’s holding up well and I am a bigger guy too. I weigh 300lbs and when I really hammer down on the bike nothing feels likes it’s going to fail on me.

patti fonseca
Second one!

Love this bike so much I bought another one after mine was stolen.