Recommended Tube Vendors?

Yes, another thread about TUBES!

Where are you guys sourcing your 150/70-17 or 140/80-17 tubes for the rear of the GS from?

Dual sports plus in Stoney Creek, ON, Canada

Your location would help in narrowing where to send you

Happy Trails has tubes.

apologies, I am in the USofA. would like interweb-based vendors in the US to lessen the shipping charges.

I use these: http://www.motorcycle-superstore.com/1/4/77/29963/ITEM/Michelin-TR-4-Inner-Tube.aspx?WT.ac=SLIsearch

They came on my bike.

Ditto! Michelin Air Stop

doesnt appear they carry 17"

front
https://www.denniskirk.com/irc/heavy-duty-21-in-inner-tube.p535160.prd/535160.sku

rear (i think - always had a more difficult time with the 150/70-17 in an HD).
https://www.denniskirk.com/irc/heavy-duty-17-in-inner-tube.p535165.prd/535165.sku

in a jam you can stuff an 18" tube in the rear.