I highly doubt that you'll need the mobility of full splits or anything... but you can perform well with them if you want to work them anyway. I know Chris has his
Hmmm... Well I guess you don't need the mobility for full splits... But, IMHO, it's a good GREAT goal to have and to cross off the list.
And I'm sure there's something that requires that kind of flexibility...
I agree...
The splits are not *necessary* for parkour - but neither is flipping - oops, did I open a can of worms?

IMHO the splits are great to have because it really reduces risk for a ton of injuries and makes a lot of skills easier to gain. You do lose a bit of explosiveness (look at a lot of the REALLY explosive people and you will see that most of them are incredibly inflexible) but its a tradeoff that's well worth it.
I can still do standing back tucks and punch fronts no problem as well as my record wall run being about 11' 6" or so before my knees crapped out...not to mention the day Will and I were double konging 14 foot long mats at open gym...that was fun.
Aside from that, leg support is always a good thing to have.
A picture such as this one of me doing splits on cat fountain shows a time where splits come in handy for being badass and
epic jumping spiders. This just stresses the point more that strength in the full ROM from standing to split is important...
Oh yeah, one more thing - without good flexibility in pike and splits it is nearly impossible to do this
little number and this
party trick.
In short, what Steve said in his article is that OVERFLEXIBILITY is a problem - and that is sport dependent. It is my opinion that our sport calls for splits and fully closed pikes quite a bit just to be on the safe side and to avoid injury. If parkour, as you practice it, does not call for this level of flexibility then you don't need to worry about it...though I think that is kind of closed minded
