Building dirt jumps

PB Forum :: Dirt Jumping & Street
Building dirt jumps
Author Message
flag dibbott
Posted: Jun 29, 2011 at 5:22 Quote
fair enough haha, i really need to get building this summer, just waiting for my mate to finish college.
flag James-Carey
Posted: Jun 29, 2011 at 12:38 Quote
wait till winter, it is to dry to bother digging
flag dibbott
Posted: Jun 29, 2011 at 14:43 Quote
Yeah i was thinking that the other day, mights just have to scope the place and clear it all out ready for winter.
flag specializedp-2
Posted: Jun 29, 2011 at 17:58 Quote
I'm just wondering what the distance should be between each jump. I've made my first jump and I don't want to waste a ton of time because the second one is too close or far.
flag cmc4130
Posted: Jun 29, 2011 at 22:43 Quote
specializedp-2 wrote:
I'm just wondering what the distance should be between each jump. I've made my first jump and I don't want to waste a ton of time because the second one is too close or far.

measure from the top of your landing to the top of the next lip. one rule of thumb is that distance should be double the length of the gap you just cleared.

like this:
Unsecure image, only https images allowed: http://i255.photobucket.com/albums/hh138/upsetbmx/Physics-of-Trails-Flow---CMC-4-20-11.jpg
Unsecure image, only https images allowed: http://i255.photobucket.com/albums/hh138/upsetbmx/Nike-Swoosh-Pit-Method-of-Dirt-Jump-Lines.jpg
flag specializedp-2
Posted: Jun 30, 2011 at 5:32 Quote
Thanks, my bikes broken so I cant just ride it and guess.
flag James-Carey
Posted: Jun 30, 2011 at 7:10 Quote
specializedp-2 wrote:
I'm just wondering what the distance should be between each jump. I've made my first jump and I don't want to waste a ton of time because the second one is too close or far.


build it too far to give room to expand, and for the jumps to grow, i personally say for a fresh set the length of the lip and the landing distance in the bomb hole, minimum is the length of the landing
flag ricar
Posted: Jun 30, 2011 at 15:12 Quote
Really I like to build on a very slight down hill. Each jump can get a little bit different, bigger, longer ect... Point is, I like to build and ride. As they get ridden and packed you get a better feel for how big the next jump can be. IE, if you can over shoot by a foot, make the next one a foot longer...
flag cmc4130
Posted: Jul 1, 2011 at 14:21 Quote
ricar wrote:
Really I like to build on a very slight down hill. ...

excellent idea.
flag specializedp-2
Posted: Jul 4, 2011 at 16:08 Quote
Would any of you recomend using logs as back suport but not actualy in the jump?
flag ricar
Posted: Jul 4, 2011 at 16:35 Quote
Sure I've even buried them inside. They get so compressed if you cover them completely hey can take for ever to rot.

 


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