Many people on the other forum complain about constant resetting of digital speedos. The sigma 9 function model works flawlessly...I have upgraded my plug and wire though, so I cant attest to its function with a stock plug wire. The other good thing is it can be adjusted for any tire or rim size. I tested it with my GPS and it is dead on accurate...Reads up to 50 MPH...At 20 bucks it is a good buy IMO...Scott

www.amazon.com/SIGMA-9-Function-Topline-...ometer/dp/B000GWPCS2

good review.

if i wasnt such a nut about the way analog speedos look, id have a digi.

I have the pyramid analog, ordered it here...I just wasn't impressed with its accuracy...there is a significant jump in tire radius when changing tire sizes...Happy does your analog speedo have problems with the needle jumping\vibrating around? the one I have does, that's the main reason I switched over to digital...Scott