Product Description
David Grant signature BMX Frame by BSD. This frame has been designed with the taller rider in mind or someone who just wants a bigger, taller frame for Street.
The frame has a taller standover than most and as such feels less twitchy when riding big set ups. The frame is made entirely from the best 4130 and has a butted front end with gussets and a taller headtube to keep things where they should be. At the back this frame features small heat treated dropouts which fit pegs perfectly to eliminate hang-ups and even has built in chain tensioners to keep the wheel in place at all times. Removable Brake mounts (not included), a built in seat clamp and pre-drilled for gyro tabs makes this frame ready for any type of riding style.
Product Specs
- MATERIAL: 4130 Chromoly
- HEAD TUBE ANGLE: 75.2°
- SEAT TUBE ANGLE: 71°
- CHAIN STAY LENGTH: 13.5"
- BB HEIGHT: 11.75"
- WHEEL SIZE: 20"
- STANDOVER HEIGHT: 9.5"
- DROPOUT SIZE: 14mm
- HEADSET TYPE: Integrated
- BB TYPE: Mid
- BRAKE MOUNTS: Removable
- GYRO TABS: Removable
- WEIGHT: 5lbs
Product Highlights
- Geometry Specially designed for taller riders
- Best suited to Street and Park riding
- High-quality Chromoly construction
- Built in chain tensioners
- Gusseted tubing for added strength
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. Remember, we're all BMXers here so if you have any questions just ask.
Keep reading to find your perfect frame, or click below to watch the buyers guide video.
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 - 3ft 8" - best suited to a 16" BMX bike
3ft 8" - 4ft - best suited an 18" BMX 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
| Rider Height (in) | Rider Height (cm) | Top Tube Length |
|---|---|---|
| 5' | 152 | 20" |
| 5'3" | 160 | 20.5" |
| 5'6" | 167 | 20.75" |
| 5'9" | 175 | 21" |
| 6' | 182 | 21.25" |
| 6'6" | 200 | 21.5" |
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!
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 high speed!
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.
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.
Stand over 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.