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Discussion Starter #1
Will I lose many rpm's when cruising on freeways dropping down to a 47 tooth sprocket from a 49 on the bike . I've been looking on site and not finding much about rpm drop. I was hoping for a 45 tooth myself but cannot find one . Also will I need to shorten chain at all for those who have done it. Thanks for any info
 

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47 teeth ---> 45 teeth = 95.7% = 4.3% reduction in RPM at a given speed

So, if you were riding at 5,000RPM, then you'll be doing 4,785 RPM for the same linear speed
 

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I also would be interested to find out how a 47T would preform.

Of all the TA & AT the RD03 has the biggest rear sprocket, dropping from a 49 to a 47 should increase fuel efficiency but would it run well?? Has anybody experience with this setup on a RD03


89 Africa Twin RD03
 

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Discussion Starter #4
I'm putting the 47 tooth on next trip. I'm going to keep looking for a 45 though. I did find a 43 but that seems to be a rather large gearing drop but you never know. I'll find out . Thanks for info
 
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