Could anyone help me identify the gear ratio of the speedo as fitted to a 24 dc - the speedo ser no is 3170/09 1632
many thanks
Ian (GRA member)
many thanks
Ian (GRA member)
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I am not sure what you mean by 'gear ratio' of speedo. There is only one gear ratio for the Greeves speedo drive & its 3.142:1 (44t & 14 t gears) as covered in this thread http://www.greeves-riders.org.uk/for...do+drive+gears & this one where another member was asking a similar question. http://www.greeves-riders.org.uk/for...t=speedo+specs
Note also that Brian Thompson has specifications on the correct speedo fitments for Greeves.
The gear ratio code on the speedo is the 1632 bit. My 25DC speedo has a ratio code of 1600. Not sure if yours will be faster or slower. These small diameter Smiths speedos are notoriously inaccurate, the one on my bike reads approx. 5 mph fast. If you really want a to know the exact speed fit a cycle speedo on the handlebar, they are cheap to buy & correctly calibrated will be accurate to within 1 mph.Last edited by Colin Sparrow; 22/03/2013, 08:04 AM.
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