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Henry Hopper · 03-09-2018, 05:32 AM

I am going to fit 16x7" tyres to the rear of my cabriolet and according to the chart I need a 20 tooth turtle for the speedo drive.Ive searched all the usual places but can't seem to locate any suppliers.Does anyone know if they are available and if so where.Average speed cameras are popping up all over the place and they do not allow any leeway, so I need an accurate speedometer.

03-09-2018, 05:32 AM	#1
Henry Hopper Senior Member Join Date: May 2010 Location: N.W.England Posts: 439	Speedo turtle? I am going to fit 16x7" tyres to the rear of my cabriolet and according to the chart I need a 20 tooth turtle for the speedo drive.Ive searched all the usual places but can't seem to locate any suppliers.Does anyone know if they are available and if so where.Average speed cameras are popping up all over the place and they do not allow any leeway, so I need an accurate speedometer.