Ok, according the online nmanuals on HPI the hubs and carrier s are the same between the flux and X, p/n 85048. Sems to contradict with what the features page says:
"The Savage Flux HP features the uprights designed for the larger tires and weight of the Savage XL, giving you the assurance that you'll be able to deal out the same abuse that all the other nitro-powered Savage trucks can handle! Beefy parts mean the Savage Flux HP can take the abuse and punishment of extreme off-road driving."
Just checked the XL manual and it shows p/n 85048 as well. So I already have those parts.
Now I wonder why integy sells 2 different rear hubs for the X and XL?
http://cgi.ebay.com/ws/eBayISAPI.dll...K%3AMEWNX%3AIT
http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWNX:IT
I bought both... I have one truck that I have stretched out to a 15" WB. Since there is no difference in the hubs between the flux, X and XL they must be able to be used on all of them...