Revs per MPH, seeking knowledge.
Ultimate HDF Member
Joined: Apr 2010
Posts: 7,138
Likes: 26
From: Southern Oregon
aside from a different load on the engine why do you think it matters? its all about gear ratio and rpm (engine speed) 
Elite HDF Member
Joined: Apr 2007
Posts: 4,919
Likes: 23
From: Seattle, WA
woznotwoz:
Gear Ratios (overall) for 2011 Street Bob are as follow:
- 1st 9.311
- 2nd 6.454
- 3rd 4.793
- 4th 3.882
- 5th 3.307
- 6th 2.79
... so, final drive in 6th is 2.79 ... you can use the Andrews table to see what your RPM at speed is ...
... or you could do a spreadsheet like I did filling in your own data ...
When I installed a BDL belt drive it changed the primary drive ratio so I re-did my table ...
[of course, my tables use the specific primary and final drive ratios for my '05 FXDI]
Gear Ratios (overall) for 2011 Street Bob are as follow:
- 1st 9.311
- 2nd 6.454
- 3rd 4.793
- 4th 3.882
- 5th 3.307
- 6th 2.79
... so, final drive in 6th is 2.79 ... you can use the Andrews table to see what your RPM at speed is ...
... or you could do a spreadsheet like I did filling in your own data ...
When I installed a BDL belt drive it changed the primary drive ratio so I re-did my table ...
[of course, my tables use the specific primary and final drive ratios for my '05 FXDI]
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