Who are the Red Templars? Which main Chapter/Legion were they founded from?

Nothing in the Codex nor the Index Astartes database on the GW website can tell me who they are...and they seem to be Bikers, just like the White Scars (at least, that's what I believe, see page 73 for info).

I don't really like the Primarch of the White Scars, and with an all-Biker chapter I'd want Bikes to be a heavy thing in the line...but if these Red Templars aren't from the White Scars (they aren't according to the GW website) then I'd like to know where they're from?

Anybody know, and does anybody know any other Bike-toting chapters?