Originally Posted by
tyrion
Panaracer Gravelkings 700x43 have a max PSI of 60. I run my Gravelkings SS+ (700x43) at 40 psi in the rear and 25 psi in the front, and I'm 230 lbs., so 60 psi might be enough for a tandem, depending on your total weight.
The rotten tires I just took off were 700x35C with a max pressure of 90 psi. When I bought them years ago I remember specifically they were suitable for tandems.
My rims are 22mm outside to outside and the inside to inside is 19mm . I think the rims handled the 35C width tires just fine and I might try 38C just a bit wider but I cannot find
the minimum recommended rim widths for the larger or wider tires. That 19mm looks pretty puny and 43 is more than double ... so I am curious about this.
Also BTW regarding some of my previously stated dimensions..... The tag on my rims identifying the model is incorrect and it states incorrectly 559mm . If I was an absolute beginner I would be really confused. You have to have some level of confidence to say the factory is wrong.