United K40 L40 KL40 Frame (discontinued)

Average User Rating: (Spectacular)
United K40 L40 KL40 Frame United K40 L40 KL40 Frame
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Made for dirt but used for park

The Good:

Head tube angle through me off at first, but now i cant even ride any other bike unless its got a similar stance in the front. The frame is well balanced and the welds are true craftsmanship. Hold the frame by its top tube or rear dropouts and give the thing a little flick with your finger and you can here the true construction ring through the entire body. Most frames cancel out the vibration as soon as it hits a weld, this one carry's through (to me this is a solid welded frame, the sound of a perfect build) Crashed the bike multiple times, used to ride a MirraCo Blink frame but cracked it after a few months of riding, this united has held up with non signs of wear though, huge abuse has gone through the bike. I liked the frame so much i bought a back up frame just in case, but i have yet to need it.

The Bad:

not a good design for flatland. the stance of the frame throws out completely new balancing techniques. The mat finish is AWESOME but is easily visible when it is nicked or scratched.

- No integrated chain tensioned
- Matt finish takes a beating and is hard to patch
- The double heat treated model is a little to tight in the BB, broke a set of bearings pressing them in, after contacting manufacturer i was informed i had to use special bearings to avoid aftermarket ones from "Squashing"

Overall Review:

United has really pulled there stuff together here. Last years United catalog was impressive but this year has shown true signs of craftsmanship and technique. The dirt frame is a great build that is far capable outside of the mud, i have been a faithful MirraCo rider for a few years but couldn't pass down the K40 Frame...

Love it wouldnt want any other frame

The Good:

Everything, cant ask for anything better, very strong

The Bad:

Nothing 0 zip na da

Overall Review:

nicest frame i have ridden


Product United K40 L40 KL40 Frame
Riding Type Freestyle
Wheel Size 20"
Top Tube Length
  • 20.75"
  • 21"
  • 21.3"
Chainstay Length 13.75 (Center to Center)
Head Tube Angle 74.5°
Seat Tube Angle 71°
Standover Height
BB Height
Brake Mounts Seatstay (Removable)
Dropouts (Axle Size) Screw Through Chain Tensioner Built Into Compact Dropouts
Headset Integrated
Bottom Bracket Type Mid
Seatpost Clamp
Colors K40 Royal Blue, L40 Cream, KL40 Matt Black (K40/L40 Graphic Kits Supplied)
Weight N/A
Price N/A
More Info

United website

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