Mountain bike fashion keeps heading towards a smaller and smaller frame triangle. Ostensibly for increased stand over clearance.
One downside of this change is reduced room for cargo inside the frame.
Personally I don’t need any standover clearance on my bikes – including my mountain bikes. I’ve been riding and falling off bikes for decades and never had any groin to top tube issues.
What I do have a use for is storage space inside the frame and I’d prefer to use a seatpost that wasn’t 2′ long, but that’s just me ;)
Scott had to get a custom bike [see below] with a top tube that curves up higher than normal get a ride with a large interior space for a frame bag.
I couldn’t afford custom bling, but when I was shopping for a 29er frame I did my best to get one without a crazy low top tube. I also got the largest size On One Scandal 29er frame I could ride in order to maximize the interior design.
Happily there are a few bike designers who are savvy to the benefits of a large main frame triangle. Jeff Jones offers his line of mountain bikes is the sexy curved spaceframe version and a bikepacking friendly diamond frame version shown below.
Jeff’s bike line up is nice in that folks who want an uber low top tube have a frame design to choose from and those who want to fit a big frame bag also have an option – yet both bikes share the same geometry and fit.