Pardon me if this seems like a bit of a noob topic, but I'm noticing the potential for something here.
We have traditional MTB geometry. Designing for 29" wheels compromises some of this. 27.5" wheels hardly at all. Seems we've found an ideal size for those who put traditional geometry ahead of wheel size.
We have traditional road & multipurpose bikes with their geometry, which is built around 700c wheels. While the tire sizes are all over the place, 700mm works out to... 27.56". Which seems to work well for the majority of adult riders. I'm starting to see a pattern here.
And finally we have large volume 26" tires, such as 26x2.7. Which works out pretty close to 27.5".
I'm aware of conversions of cyclocross bikes to take 27.5" MTB tires. And of specific 26" MTBs. And then there's Surly subtlely acknowledging that the new Instigator that's designed for 26+ could take a 650B MTB wheel.
But it seems like this is just scratching the surface of what's possible. I see people discussing how big of a tire to cram on a monstercross or dual sport bike, while thinking inside of the box of it being on a 622 rim. It would seem to me that there's potential for some extreme versatility to mix and match frame styles with tire styles, all while keeping the same outside diameter and thereby the geometry.
Case in point - a friend is looking for a new bike. Looking into multiple purposes (isn't everyone). Unlike me, with a gravity field forming around all the bikes I've collected, he doesn't have room for a collection. Body proportions are also ruling out a few models. And where we are now is that he may want MTB geometry with road size wheels. Or MTB wheel capacity with the utility of a hybrid. Still working that out.
Does this resonate with anyone? Is anyone else intrigued by the idea of a cross frame or MTB frame that could take 700C, MTB 650B, or 26+? And wishing manufacturers might start to think that way? I am aware of one or two niche models that seem to have 2/3 of these sizes in mind, but nothing major, and not all 3.
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Thread: 27.5" - 3 Wheel sizes?
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