Shameless 'bent plug
(used for a tiny bit more than 1K shipped).
1K buys a decent amount of diamond frame road bike - and slightly better than entry level 'bent (unless you buy used like I did).
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Quote:
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54" left some clearance and felt pretty comfortable, but online recommendations put me at a 50" frame...
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See if the shop will let you do a 20 minute test ride (even 10 should do it). See how your knees/arms/back feel on different sized frames and cranks lengths. Those calculators are general guidelines (and they're pretty good) - but humans vary in proportion. Me, for instance; I'm 5'11and 135lbs - with a long "neckular" region - which throws things off...
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For example
Now you say you're commuting... Have you considered something closer to a commuting/touring bike?
like this?
The handling will be less sensitive and the ride should be a bit more comfortable due to position. But if you want a go fast bike - I completely understand (my 'bent isn't "go fast" but it's not exactly "recreational" - I like going fast).