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I just want to have my thinking confirmed. If one were to ride a “boneshaker” bike, direct drive fixed gear, with a 52″ wheel ( http://worksmancycles.aitrk.com/shopsite_sc/store/html/page38.html ), when I go to Sheldon Brown’s gear calculator ( http://www.sheldonbrown.com/gears/ ) and punch in 700 x 28 wheel with 48 chainring with 25 t cog, it gives me 51.4 gear inches, which comes out close to the 52″ direct drive wheel, is that right?
So, a person of reasonable fitness could reasonably ride a 48 x 25 fixed gear all around the hills of Pittsburgh, therefore, a 52″ boneshaker as well, right?
I think I might need to start liquidating some non-essential items to Craigslist.
what about the mechanical (small) advantage
of crank length?
Yeah, the chart has an input for that, too.
Yes, that is the whole meaning of gear inches, equating your “safety” bike’s gear ratio and smaller rear wheel to that of a high wheeler.
52″ is really small for a fixed gear though, even with the hills here in town. I ride between 68 and 72 gear inches, lower for my more distance oriented fixed road bike, 72 for shorter, faster rides.
Even if a boneshaker was available in something larger than a 52″, I don’t think my 30″ inseam would allow me to go to a higher “gear”. Ha, ha!
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