khm4252 Posted March 11, 2015 Share I was wondering if someone could shed more light on the whole idea of gearing on a road bike. What does a compact crank mean? What are the numbers that people throw around like 54/36 and what do they mean? Always nice to learn and be better informed. Link to comment Share on other sites More sharing options...
dirtypot Posted March 11, 2015 Share The numbers are the teeth - 54 teeth on the big ring and 36 on the small.Compact crank normally has lower gearing for better climbing uphills at the expense of top speed. Although I have a compact crank and only notice this on some hills where you're still pedaling in top gear. Link to comment Share on other sites More sharing options...
Zatek Posted March 11, 2015 Share You have a standard crank with 53 39 blades as standard. You big blade has 53 teeth and your inner blade has 39. A standard crank had a bcd 130mm that is the distance between the bolts 9f the chainrings. Compact crank has a 50 34 blades by standard with a bcd of 110mm. Mid compact is a compact crank but with 52 36 chain rings. Link to comment Share on other sites More sharing options...
BogusOne Posted March 11, 2015 Share Its all here Link to comment Share on other sites More sharing options...
word Posted March 11, 2015 Share BogusOne, that is just rude. Here, I have corrected it for you: http://bit.ly/1EbIYm2 Link to comment Share on other sites More sharing options...
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