I have a 120mph 914 speedo hooked up to all the stock Super Beetle cables and what-not. Reads exactly like the stock one did. I have 195-50-15 right now, swapping to 205-40-17 soon.
You should have no problems with the 914 speedo at all.
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Mike Serrone
'08 GTI DSG :: 1980 911 SC Track Car
1972 1302 German Looker - dearly missed
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