Toyo R1R on Estoril

[James-Westfield]

Hi all,

I've had Toyo R1R tyres on previous lightweight cars and loved them, they don't make the sizes that are currently (both old Bridgestones I think) on my Griff 500 Estorils:

225/50/15 Front
245/45/16 Rear

Based on the wheels being 15x7 and 16x7.5 I should be able to run a number of the Toyo R1R tyres based on the table on the Toyo website:
https://tiresize.com/tires/Toyo/Proxes-R1R.htm

I'm thinking about the following sizes which according to the table will fit the rim widths:
225/45/15 and 225/50/16 ( both W speed rated)

The speedo sensor is on the rear so to check if my speedo will be affected I've looked at an online calculator with the following results:
Current 245/45/16 = 819 revs/mile
Proposed 225/50/16 = 844 revs/mile
So only a 3% difference in terms of circumference and effect on speedo, I'm ok with that, especially as it is an increase in indicated speed.

Has anyone run R1R tyres on their Griff, and has anyone run the same width front & back?

Any other comments/observations welcome, or even a link to other amazing tyres available to fit all 4 standard wheels for under £150/tyre.

Thanks

[James-Westfield]

Thanks for the responses thus far.

I see it might be a little difficult to even get hold of the tyres I'm looking for!

The thing with the balance issue is that it's so hard to find the same tyres front and rear, the R888s and A048R are too track focussed for me and I do occasionally need to some longer motorway journeys in the Griff so want to be confident in pouring rain. Having different brands and patterns front and rear is going to upset the balance just as different sizes will.

Do I really need to get new wheels to solve the tyre problem?!