PK Ripper

indeed, I meant to say before, there is a reason any decent BMX is full 4130.

indeed, I meant to say before, there is a reason any decent BMX is full 4130.

25+ years can't be wrong

that's more to do with BMX riders ignorance/prejudice than anything scientific!

Even if it's prejudice, it's probably well-founded. In the early days, there were quite a few AL frames, but they were only good for racing because there wasn't the same amount of impacts and landings that you'd get doing freestyle.

They still use AL frames in racing today, which by all accounts is stronger that the old versions.

i have tried to make this point before, aluminium always fails around the headtube which isnt so much of a problem if you have front suspension as most jump/park frames do but when your fully rigid with aluminium then its not as suitable

i have never seen a broken pk ripper 20" bmx

That is down to how the frame is made rather than the material. Alu could be used to make a frame that is just as strong as 4130. Admittedly the tubes would be a bit large and probably look a bit silly on such a small frame (just look at the alu race frames!) but that has nothing to do with it actually working.

im not on about BMX frames im on about dirt jump and park frames here

same is still true, alu can be made just as strong if it needs to be. Would probably end up the same weight and still look over tubed but would be just as strong as 4130.

As this is about the PK Ripper 700c bike none of this is relevant anyway as at most it will jump off a couple of foot of steps which I do all the time on my Scandium cross bike with carbon forks!!

Hi I'am seriously considering a dc pk ripper because of the claimed weight! At 21 lbs it seams very light compared to the cro-mo ones which seam to be 24-30 lbs. I don't have any problem with 6061 alloy as i've own a legendary bombproof GT Zaskar polished 6061 MTB since '93 and have tried my damdest to kill it but she refuses to die. In the early 90's we used 'em for jumping and DH.

21lbs for a fixed gear bike is not very light, in fact it is on the heavy side!

15lbs is very light and 18lbs is good for an alu fixed bike.

I have one of these that my brother bought just under a year ago from Evan's. But am looking to swap to something a little more road-friendly, has anyone got any suggestions as to the best way to go about selling it and how much it would fetch (it's barely been used)?

wow...........

really?........

only on lfgss.

oh wait no all forums have people like that... :(