Riley1 Posted March 30, 2010 Report Share Posted March 30, 2010 Afternoon, I'm looking at buying a new set of cranks and have no idea how long my current set are. I'm around 6:3 and ride stock and wondered if there is a huge difference between 170mm and 175mm? pros and cons etc would be appreciated. Cheers Quote Link to comment Share on other sites More sharing options...
Matthew62 Posted March 30, 2010 Report Share Posted March 30, 2010 why not get a ruler out and measure your current ones? Quote Link to comment Share on other sites More sharing options...
Mark W Posted March 30, 2010 Report Share Posted March 30, 2010 Almost all cranks have the measurement on them on the inside face of the crank near the pedal boss anyway Quote Link to comment Share on other sites More sharing options...
Riley1 Posted March 30, 2010 Author Report Share Posted March 30, 2010 Almost all cranks have the measurement on them on the inside face of the crank near the pedal boss anyway Thanks, I'll check when I get home. What difference would 5mm make between 170 and 175 though? Cheers Quote Link to comment Share on other sites More sharing options...
Mark W Posted March 30, 2010 Report Share Posted March 30, 2010 Not a huge difference, although I generally prefer 175s. Basically makes your gearing feel 'lighter', whilst you're still getting the full power from your gear ratio, if that makes sense? So it's like you're putting a lighter gear ratio on, but without making it actually easier. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted March 30, 2010 Report Share Posted March 30, 2010 I would say 175s too, especially given your height. Quote Link to comment Share on other sites More sharing options...
forteh Posted March 30, 2010 Report Share Posted March 30, 2010 If you use sheldon browns advanced gear ratio calculator (the one that takes crank length into account) then you can see and compare the effects of different cranks on the gearing. Shorter crank arms allow you to spin the cranks up faster where as longer ones give you more leverage, Im not sure if the crank leverage is effectively seperate to gear ratio though. For example 16:14 (1.14:1 gear ratio) with 165 cranks is only very slightly lighter than 18:15 (1.2:1 gear ratio) with 175 cranks. Quote Link to comment Share on other sites More sharing options...
Riley1 Posted March 30, 2010 Author Report Share Posted March 30, 2010 Ok, great Thanks for the advice guys. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.