Radio Nemesis Frame

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  • This fully heat treat chromoly frame features super thick 6mm CNC machined dropouts, a short 12.7″ back end and a steeper 75.5° headtube, giving you an agile and responsive ride.

    The Nemesis uses straight gauge tubing for extra dent resistance, and a taller 125mm headtube to eliminate the need to run spacers under your stem. The Nemesis is one tough steed built for absolutely anything, street, park or even dirt!

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Product Specs
  1. MATERIAL: 4130 Chromoly
  2. HEAD TUBE ANGLE: 75.5°
  3. SEAT TUBE ANGLE: 71°
  4. CHAIN STAY LENGTH: 12.7″-13.3″
  5. BB HEIGHT: 11.75"
  6. WHEEL SIZE: 20"
  7. STANDOVER HEIGHT: 9.25"
  8. DROPOUT SIZE: 14mm
  9. HEADSET TYPE: Integrated
  10. BB TYPE: Mid
  11. BRAKE MOUNTS: Removable
  12. GYRO TABS: Removable
  13. WEIGHT: 5.2lbs (21″)

Product Highlights
  • Responsive Geometry with Short Backend and Steep Headtube
  • Great all round frame for all types of riding
  • Super tough frame with modern, technical geometry,
  • Extra thick tubing to resist denting,
  • 125mm tall headtube to reduce the need for stem spacers.

NEED SOME HELP UNDERSTANDING FRAME GEOMETRY?

bmx frame geometry can look daunting but thanks to our handy guide below you will have it figured out in no time, and remember we're all bmxers here, so if you have any questions just ask.

Frame Size Chart


Frame Sizing is very much a personal preference, some riders like them longer, others shorter - here's a rough guide - if you have any questions remember we are here to help! 

3ft - 4ft - best suited to a 16" or 18" wheeled bike
4ft - 5ft - 18" to 20" top tube
5ft - 5ft 4" -
20" to 20.25" top tube
5ft 4" - 5ft 8" -
20.25" to 21" top tube
5ft 8" - 6ft -
21" to 21.25" top tube
6ft Plus -
21" top tube or longer

Frame Geometry

Frame Geometry can take a bit of understanding - but here at SourceBMX we are here to help! The first thing to understand is that BMX frame Sizing is best measured by the length of the Top Tube - shown here as TT. Keep reading on to understand how the angles change how your frame will feel and check out our sizing chart below! 

Headtube Angle (HT)

Head tube angle determines the angle of your forks. A steeper HT (i.e 75°and higher) will make the bike turn quicker than a mellower angle (i.e 74.5 and lower°). The more responsive the frame, the more twitchy it will feel, especially at highspeed!

Chain Stay Length (CS)

The chain stay is essentially the length of the rear end of the bike. A shorter CS length will make the bike more responsive and a longer one more stable. As a rough guide a 13.5" long chain stay is about average.

Seat Tube Angle (ST)

Seat tube angles don’t vary too much (around 71°) and affect the centre of gravity. The steeper the angle the shorter your bike will feel. Some frames have a mellower seat tube angle (example 69˚) which makes for a longer frame without actually being longer and reduces how fast your frame turns.

Stand Over Height (SO)

Standover height is essentially how high your frame is. A frame with a low standover height is more responsive and easier to ‘throw around’ whilst a high SO height is more stable; particularly useful when going fast.

HALF PRICE HEADSET AND BB WITH FRAMES