All,

I notice that most all of the PL parts are interchangeable from the XR, Folding and Big Foot buggies.

My question...can the PL Comp ST be modified with any of the PL parts listed above.

I would like to extend the frame a little longer...

PL makes an (3") extended down tube and the question would be would it fit a Comp ST?

If not, any homegrown custom extension solutions or ideas ...besides buying a different buggy

Thanks in advance...

Where are you in the US or elsewhere?

There are some vagaries with sizes of fitment

imperial versus metric sizing

PL comp ST buggy is very different from the XR+. Biggest difference is the diameter of the tubing. The XR+ frame rails are larger diameter than the ST buggy, so they will not fit and are not interchangeable. The downtubes are also different. The ST is appx. 1" square and the XR+ is 1.25" square, also making it nearly impossible to interchange the two.

Your best bet would probably be to sell the ST buggy and then just upgrade to an XR+.

Nice thing about the XR+ is that the bigfoot and the XR+ are both completely interchangeable, so getting a longer rear axle or longer frame rails is a simple bolt on.

Hope that helps.