Built a browser-based 3D halfpipe/ramp design tool called RampNerd.
You can tweak height, transition radius, platform, coping reveal; see live materials/cost; and export a BOM, CNC files, and manual cut guides.
It’s mainly tuned for skateboarding right now (because of my background), but I’m looking into adding a BMX mode with BMX-specific presets and feedback.
What would you change for bikes — bigger radii, wider decks, different coping, thicker framing?
Also, any solid resources you trust (preferred radii, deck widths, flat-bottom lengths, coping diameter/reveal)?
You can try it at [rampnerd.com]()
How to make this ramp design tool better for BMX?
byu/Proof-Pause3542 inbmx
by Proof-Pause3542
3 Comments
This is Gods work and if i ever get some free time again i know what il be doing. Amazing op
There’s not massively any difference in construction for skate and bike, they’ve shared those techniques for decades.
Coping sizing or for that matter how deep it sits can differ.
Flat bottom length is usually more for bikes.
Hey I commented on your original post a while back .
BMX uses the same ramps as skateboards. Most BMX don’t like coping sticking out a huge amount. Not as much as skaters.
From my time making ramps, I wouldn’t go any smaller than a 6.5′ radius for a transition. It’ll start becoming too tight and hard to ride. Ideally, 8′ is the sweet spot.
Definitely would like moredeck space.
For flat bottom, depends on the speed, but I would think it’d be about the same as skateboards as I’ve noticed skateboards usually like more flat to adjust and prep for the next hit.
The ramps I built, I had 2x4s ever 8″ for a rib. Worked fine for BMX. Might need to be shorter if it was a scooter though.