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!
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Reed Stark signature Safari frame from BSD. The Safari frame is a tall frame with a big standover and because of this it also has a taller headtube to keep the frame angles looking nice. The taller headtube distributes stress at the front of the frame over a larger area and also means you can run your stem and forks with no headset spacers for a cleaner look up front.
On a frame the highest concentration of stress is at the junctions between the headtube/toptube and headtube/downtube. To handle the pressures of modern riding, the required strength is achieved by beefing this area up using a combination of butted tubing and external gussets, making it built for urban adventure wherever your street safari takes you… -
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Product Specs
- MATERIAL: 4130 Chromoly
- HEAD TUBE ANGLE: 75°
- SEAT TUBE ANGLE: 71°
- CHAIN STAY LENGTH: 13"
- BB HEIGHT: 11.75"
- WHEEL SIZE: 20"
- STANDOVER HEIGHT: 9.5"
- DROPOUT SIZE: 14mm
- HEADSET TYPE: Integrated
- BB TYPE: Mid
- BRAKE MOUNTS: Brakeless
- GYRO TABS: Brakeless
- WEIGHT: 5.3 lbs
Product Highlights
- Nuetral Geometry for responsiveness and stabilty
- Best suited to Street and Park riding
- Taller Top Tube so you can run your bars higher without headset spacers
- Top Tube and Downtube gussets with butted tubing for added strength
- Super Strong Invest Cast Dropouts
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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)
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.
