Post Your Pumptrack! + Discussion

PB Forum :: Trail Building
Post Your Pumptrack! + Discussion
Author Message
flag jimbsport
Posted: Dec 10, 2015 at 9:12 Quote
this berm is 8" radius, when the pumptrack got faster, the berm felt tight. i corrected the situation by adding more height to the berm and more vertical

photo


for this berm i was getting a lot of speed and get taller berm you will keep your speed

i
photo
flag jimbsport
Posted: Dec 10, 2015 at 9:15 Quote
i have limitation and trees in the pumptrack, the key is never flat

photo

and or higher berms

photo


photo
flag cmc4130
Posted: Dec 10, 2015 at 10:14 Quote
jimbsport wrote:
this berm is 8" radius, when the pumptrack got faster, the berm felt tight. i corrected the situation by adding more height to the berm and more vertical

that's exactly right.

it's all about getting that berm to have a steep transitioned face in order get sideways.
flag Endurahbrah
O+
Posted: Dec 15, 2015 at 13:05 Quote
That's a killer track jimbsport! How much dirt did you have to bring in for that build? I have a near identical plot of land, many trees and rocks, and it's at the far end of my backyard. I can't haul dirt very easily back to the area I want to build. I was going to have 20 yards of soil delivered to my front yard. Of course, the front yard is much lower elevation from where the track would be. So I would have to wheelbarrow uphill, or rent a machine for a day or maybe longer.
flag BLZ78
Posted: Dec 20, 2015 at 10:20 Quote
New pumptrack a the spot ! more photo soon ...

Digging day at home spot ALNSM
flag Xolorr
Posted: Dec 27, 2015 at 11:52 Quote
BLZ78 wrote:
New pumptrack a the spot ! more photo soon ...

Digging day at home spot ALNSM

Can I label this as pump porn?...
Like is that a thing???
flag buildstuf
Posted: Dec 28, 2015 at 13:00 Quote
Xolorr wrote:
BLZ78 wrote:
New pumptrack a the spot ! more photo soon ...

Digging day at home spot ALNSM

Can I label this as pump porn?...
Like is that a thing???
hmm try rephrasing that lol
flag KingsgateDirtJumper
Posted: Dec 29, 2015 at 11:44 Quote
cmc4130 wrote:
i would suggest reading through the DJ, Pump Track Plans mega-thread on mtbr. i've been posting to it since 2008. it may seem tedious, but seriously, try to read through all of it. Wink
http://forums.mtbr.com/urban-dj-park/dj-pump-track-plans-402237.html

I just read through all 13 pages.... wow CMC you are meticulously brilliant and have inspired me to put rollers and berms between all of my jumps
flag Giladgu
O+
Posted: Mar 9, 2016 at 12:30 Quote
How do you guys decide how far apart each roller should be?
flag dingo-dave
Posted: Mar 9, 2016 at 13:18 Quote
It's comes down to the size of the rollers, the speed you'll be going and the size and length of the bikes that'll be on the pumptrack. For relatively small rollers to be ridden at lower speeds you don't need much more than the wheelbase or a bike length between them. As the size and/or speed increases you'll need more spacing to give your body time to deal with the transitions.
flag watch123
Posted: Mar 9, 2016 at 16:49 Quote
If I remember correctly, a space of about 2.5x the intended users bike length is a good starting point (built a pumptrack ~4 years ago succesfully using this measurement)
flag KingsgateDirtJumper
Posted: Mar 10, 2016 at 8:19 Quote
In my opinion, the key is to build / ride / build / ride
Don't go and make 10 rollers without testing them frequently
Same with berms
flag cmc4130
Posted: Mar 10, 2016 at 13:15 Quote
Giladgu wrote:
How do you guys decide how far apart each roller should be?

10 feet peak to peak is a good starting point. Up to 13, maybe even 15 if you’re going faster. (Some DH flow trail lines have high speed big rollers that are around 20-22 feet peak-to-peak). If you’re doing 10 foot spacing, but you want sets you can jump easily, then consider shortening those sets.

dingo-dave wrote:
It's comes down to the size of the rollers, the speed you'll be going and the size and length of the bikes that'll be on the pumptrack. For relatively small rollers to be ridden at lower speeds you don't need much more than the wheelbase or a bike length between them. As the size and/or speed increases you'll need more spacing to give your body time to deal with the transitions.

Yeah I agree. Roller spacing is all about speed. Close together when you’re going slow, and more spaced-apart when you’re going faster. Also for roller height, smaller/shorter rollers can be closer together; larger ones need to be further apart. If rollers are tall/peaky and too close together, they may still be rideable, but it forces people to manual etc.
If you mean one wheel base or bike length in the “trough” like this, then I agree. But, one wheelbase peak to peak is way too close together.
photo
https://www.youtube.com/watch?v=2BDJ0JcKusM

coaster156 wrote:
If I remember correctly, a space of about 2.5x the intended users bike length is a good starting point (built a pumptrack ~4 years ago succesfully using this measurement)
A bike length is what, like 5 and half feet? So you’re saying 13.75 feet? Yeah, I would agree with that for a medium-fast track.

KingsgateDirtJumper wrote:
In my opinion, the key is to build / ride / build / ride
Don't go and make 10 rollers without testing them frequently
Same with berms

Definitely agree.
flag dingo-dave
Posted: Mar 10, 2016 at 13:24 Quote
Yup, definitely in the trough.
flag steveperry
O+
Posted: Apr 7, 2016 at 0:24 Quote
Any tips. Just starting to design mine. Thanks

 


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