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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The Matt Ray signature MR1 frame is made from full Sanko 4130 chromoly tubing with a 75° head tube angle, 71° tube angle, 11.5″ bottom bracket height, 8.75″ standover height and a 13.4″ (slammed) chainstay length.
The frame features a 120mm tall, heat-treated, integrated heat tube, gussets on the top and down tubes, double butted top and down tubes, an integrated seat post clamp, Mid bottom bracket, a Wishbone on the chainstays, plenty of clearance for 2.40″ tyres, removable seat stay brake mounts and guides and 14mm dropouts. -
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Product Specs
- MATERIAL: Full 4130 Chromoly
- HEAD TUBE ANGLE: 75°
- SEAT TUBE ANGLE: 71°
- CHAIN STAY LENGTH: 13.4"
- BB HEIGHT: 11.5"
- WHEEL SIZE: 20"
- STANDOVER HEIGHT: 9"
- DROPOUT SIZE: 14mm
- HEADSET TYPE: Integrated
- BB TYPE: Mid
- BRAKE MOUNTS: Removable
- GYRO TABS: N/A
- WEIGHT: 4.8lbs
Product Highlights
- Nuetral Geometry for responsiveness and stabilty
- Great all round frame for all types of riding
- Top Tube and Downtube gussets with butted tubing for added strength
- 14mm Dropouts
- Full Sanko 4130 chromoly tubing
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.
