Thanks for the help guys!
Didn't even know those exist! But maybe that would be a bit too much. I'm aiming at around 1 cm per side (2 cm total) extra width both front and rear (maybe 2.5 cm max). These will give me 3.2 cm.
Reading the text, front and read would align nicely when combined with rustler/stampede rear arms. That means the rustler/stampede rear arms might also be a tad wider then what I'm looking for.
The protrac arms are alright, i havent broken one yet on my sla2h. I think putting big 8th scale parts on it will push their limits but otherwise they do work just fine.
Bitd we use rear rustler/pede arms all around and just shimmed them up to fit but since rpm came out with the wide track arms its kind of a no brainer.
My only big suggestion, if youre going to wide arms is to support those arms with a aluminum bulkhead and good hinge pins (strc or lunsford). Also consider that bearing wear will increse and you will need good rod ends.
When you go longer you put more stress on all your components, some get away with it but if youre the kind of hobbyist who takes lots of care of your toys youll notice the accelerated wear and tear.
Thanks for sharing your experience with the Protrac kit. I think the Protrac arms aren't as wide as the rustler/stampede ones, am I right?
Point taken regarding the extra wear on lots of things caused by the added leverage in the arms. I guess I'll just upgrade things as they break. Kind of used to that with the Slash.