Big Apple version of the Tara. It's 75mm wide before it starts narrowing in earnest where it loops, and I reckon you'd have ~70mm between the rim and top with a 650b rim, based on some quick caliper wanging and dependant on eyelet placing. So you'd probably be good up to at least 27.5x2.5"
what tubus low rider is that? any idea if the hoop will fit with 27.5+?