Your 2005 Roadtrek 210-Popular is 21-1/2 feet in length so for a storage cover you'd want the part # 290-12220 and you'd be set. This will fit snug and protect well. view full answer...
The Classic Accessories # CA80104 would be a great cover for your 2008 Roadtrek 210 Popular. It's the correct fit and it is breathable as well like you are looking for. view full answer...
Yes the Adco SFS AquaShed RV Cover for Class B Motorhome w/ 24" Bubble Top part # 290-12220 will be a good fit for you. It is right on the edge of the stretch that you will have.
The sizing is based on the resting size so you will have enough to stretch it around the spare tire where is essentially the area that is putting you over slightly. view full answer...
The Classic Accessories Deluxe PolyPro III Heavy-Duty Cover # CA80104 should be a great fit for your 2008 Roadtrek 210 Popular RV (based on the specs I was able to track down), but I do recommend taking a measurement of the Roadtrek's overall length. This is important to make sure that rear spare tire doesn't extend its length beyond what the cover is designed to fit.
On the RV just measure from the front to the rear-most point on the RV, which is going to be the spare tire. As long as... view full answer...