-
This is actually opposite to what I was considering (narrow road 700c and wide offroad 650b), but makes quite a lot of sense. Increased width of 42-48 mm 650b tyres is not too much of an aero drag when road riding? I would also like to join some group rides form time to time, so this must be zippy enough to let me keep pace ;)
I am also a bit frightened by weight of these - over 600 g is double the 700c wide road tyres, although Gravelking (non-SK) is much more bearable - 290 g in 700x32 and 350 g in 650x42.
Prz-
ideally you'd want narrow tyres to 'cut' through the mud and give you more clearance when it starts sticking to the tyres.
The WTB Horizons are 515g but you don't really notice it, the GRavel Kings do feel faster though - don't forget that 650b rims are lighter than 700c. You wouldn't have problems keeping up with the 42c GRavel kings - I don't
pryally
sorry not had chance to measure yet but the maxxis crossmark I used was a 2.1 which fitted on the front but not the rear. I've a photo of the maxxis refuse 2.0 fitted to both front and rear.
If it was my bike I would use 700x Nano when it was muddy and 650b 38/43/47 for the road and less mud - they ride amazing and are hardly any slower than a 28