Well this sucks. Was told that the stock speedo on a 2010 street bob was 5". Well it is not I bought a 5" speedo/tach combo and it is like three times as big as the stock speedo. So first can anyone tell me what the actual size is on a stock 2010 street bob speedo? My other question is has anyone replaced the stock tank dash with one from a wide glide to be able to use a 5" speedo on a street bob?

 

The 2010 SB gauge is 4" and it's the same size as the WG. Changing the dash will get you nothing...

Your only option for a replacement 4" gauge is the all digital Dakota Digital gauge. If you want something from the MoCo, check out this thread.

 

I have a 2011 FXDC, is the stock speedo a 4 or 5 inch? I measured it but don't know if they use the OD or the inside diameter measurement. It looks like a 4 inch to me.

 

Thanks....Looks like the only option for a street bob up to year 12 is the Dakota digital gauge as of right know. I checked into the one on that thread and it will not work with a 2010 SB.