43 minutes ago, RolandK said:

That's useful info thanks. I'm going to try the 205/55 R16 route. 

 

It might be an idea to fit the 205 tyre size to a narrower 6J rim, instead of a wider 6.5J rim.

 

This is because rim width affects tyre width (as measured from one side of the sidewall to the other side of the sidewall).

 

For example, the 205 tyre will be about 6mm narrower when fitted to a 6J rim, compared to a wider 6.5J rim. It could be the difference between getting the spare wheel to sit flush in the boot and not.

 

Another example, a 205/55 tyre might be 199mm wide when fitted to a 6J rim, 205mm wide when fitted to a 6.5J rim, and 211mm wide when fitted to a 7J rim, ie. as the rim gets wider, so does the tyre width. 205 is only 205, when fitted to the nominal rim width. 6.5J is the nominal rim width for the 205/55 tyre size.

 

Toyo claim that their Proxes CF2 tyre in size 205/55R16 is actually 214mm wide when fitted to a 6.5J rim, and their Proxes CF2 tyre in size 215/60R16 is actually 221mm wide when fitted to a 6.5J rim. So changing from a 215/60R16 to a 205/55R16 on the same 6.5J rim, could result in only a 7mm difference, not the full 10mm which you might have been expecting.

 

https://www.toyo.co.uk/tire/pattern/proxes-cf2

 

205/55 R16

16

94V XL

8.5

632

214

5.5-6.5-7.5

C

B

70 dB

 

215/60 R16

16

99V XL

8.7

664

221

6.0-6.5-7.5

C

B

70 dB

 

If a 205/55R16 fitted to a 6.5J rim fits flush in the boot, then a 215/60R16 fitted to a narrower 6J rim might also fit flush in the boot. Karoq uses a 6Jx16 ET43 rim.

Skoda Karoq

Tire	Rim
215/60R16 95V	6Jx16 ET43	2.2
215/55R17 94V	7Jx17 ET45	2.2
215/50R18 92V	7Jx18 ET45	2.4

 

 

https://www.oponeo.pl/felga-stalowa/alcar-kfz-6665#21298241

 

Edited 19 April, 20215 yr by Carlston

28 minutes ago, RolandK said:

Yes I saw that thanks but my car is 220 BHP so front brakes shouldn't be an issue.  312mm discs I think. I'm going to try a 16" spacesaver first to see if that fits as it puts a bit more rubber on the road  than the skinny 18".

Cheers

 

I've got a 220 too.

I've used my 205/55/16 about 4 or 5 times (cause screws love my tyres)!!

 

2 minutes ago, JR RS said:

 

I've got a 220 too.

I've used my 205/55/16 about 4 or 5 times (cause screws love my tyres)!!

 

You'd think in this day and age that puncture proof tyres might be possible! But I guess the tyre companies don't have much incentive to make them. 

Had my 220 3 weeks now and loving it. It's a 2017 with 4600 miles on it when I got it so a good find. Plenty quick enough so the 280 must be very exciting!

Take care

8 hours ago, RolandK said:

I'm going to try the 205/55 R16 route.

just few posts above i posted size comparison, with that huge (-5.3%) diameter diff

car will not able activation of Cruise Control

 

visit https://tiresize.com/comparison/

1 hour ago, MartiniB said:

just few posts above i posted size comparison, with that huge (-5.3%) diameter diff

car will not able activation of Cruise Control

 

visit https://tiresize.com/comparison/

Yes I did see your post thanks. There is the same variance % between my 235/45 R18 wheels and both the 'official' Skoda spacesaver options of 205/55 R16 and 125/70 R18. I assume that the systems on the car can handle this variance? If it's going to disable the cruise control while using a spacesaver I can live with that. Actually not a huge fan of cruise control anyway!

Cheers

6 minutes ago, RolandK said:

If it's going to disable the cruise control while using a spacesaver I can live with that.

depends on where problem has come, i weren't happy keep 80kmh manually for ~80km distance on highway

 

another must have is DIRECT Tire Pressure Monitoring System

-> https://www.briskoda.net/forums/topic/434028-tire-pressure-monitoring-system/?tab=comments#comment-4893182

 

On 19/04/2021 at 23:03, RolandK said:

You'd think in this day and age that puncture proof tyres might be possible! But I guess the tyre companies don't have much incentive to make them. 

Had my 220 3 weeks now and loving it. It's a 2017 with 4600 miles on it when I got it so a good find. Plenty quick enough so the 280 must be very exciting!

Take care

 

They are possible but they have their downsides as well.  

Quick update......

got an unused 16" temporary spare (205/55 R16) from Ebay (£79) and ordered the fitting kit from Skoda Parts Czechoslovakia  (£67).

Car runs fine with it on apart from TPMS flagging up a pressure difference. All installed in boot floor well and looks nice and 'factory' which I suppose it is!

Thanks for all the input.

Cheers  

If its 4wd haldex isn't there some extra reasons to be cautious also? Can't remember the details but I remember thinking in my case with haldex I'd want a like for like full size spare

8 hours ago, AlVal said:

If its 4wd haldex isn't there some extra reasons to be cautious also? Can't remember the details but I remember thinking in my case with haldex I'd want a like for like full size spare

There may well be extra issues relating to the 4wd models but my car is fwd only.  As an aside this is the first car I've had putting 220bhp through the front wheels so I find it quite easy to get the traction control light flashing!  I either need to moderate my driving style or save for a 4wd next time 😁

 

 

 

5 hours ago, RolandK said:

As an aside this is the first car I've had putting 220bhp through the front wheels so I find it quite easy to get the traction control light flashing!  I either need to moderate my driving style or save for a 4wd next time 😁

 

Try running ur 220 with a Stage 1 ECU tune!!!

Putting a lower dogbone insert helped eliminate the axle-tramp, but now the tyres just chirp n spins on the spot 

Edited 27 April, 20215 yr by JR RS

5 minutes ago, JR RS said:

 

Try running ur 220 with a Stage 1 ECU tune!!!

Putting a lower dogbone insert helped eliminate the axle-tramp, but now the tyres just chirp n spins on the spot 

Interesting! I might look into that.....