Availability vs accuracy

[Toalson]

Given my original spec of tyres:175/65R14, I had since up size to 185/55R15.

 

I'm wondering for my next change to change it 205/50R15 or 195/50R15. The latter has a boarder range of brands and model to choose from and the cost is therafter lower. But however the accuracy in the speedo is about +1.6% (if not wrong) And for the 205/50R15 the difference is less than 1%

 

Which should I choose? Or Should I keep to existing profile which is oso ex due to poor demand.

 

I believe a 205 proifle would hv better grip n stability then a 195. In fact I shortlist 2 different models 512 n CPC2.

 

I believe the 512 is of lower specs compared to CPC2 but if use the 205 profile for 512 the grip aspect should be improved. Am I rite to assume this?

 

Would a 205 profile increase my FC trememdrously n pick up?

 

Tks!