How do I know if I need tubes?

[TheAccountant1969]

I have a 73 M400 (RM350) Titan and I just bought double coin RT500 tires for it. The wheels are 17.5's. I know they're not split rims, but they're not welded all the way around either. My brother had them mounted and I told him to ask about this and they just told him that the tire said 'tubeless' on it and mounted them. I will try and post pictures tomorrow but was wondering if you guys might know off the top of your heads. Thanks in advance!

[DaveVA78Chieftain]

No, you do not need tubes on 17.5" rims.  They are tubeless.  Biggest concern is the rims were not originally designed for radial tires and they have a upper pressure limit of 95lb psi even though the tire sidewall may indicate the tire itself can hold higher pressures.  I have had one rim leak and had to replace it over the years.

[TheAccountant1969]

Dave you've helped me more than you could ever know! Your website (and classicwinnebagos.com) have been invaluable since I bought this motorhome. Thank you for your help.

[DaveVA78Chieftain]

Your Welcome.  That's why it is all here and there.