tyre size - definative

abr4r · #1 (**Post Link**) 19-06-12

after looking around the various threads regards tyre sizes, i have seen that it seems that for a 17" wheel size , fitting a tyre of the spec such as 225/45/17 is the rule

a few agreements here would be confirmation that its way to go unless ???????

David C · #2 (**Post Link**) 19-06-12

That is the correct 17" size for a 166.

AlfaMartini · #3 (**Post Link**) 19-06-12

Originally Posted by abr4r

after looking around the various threads regards tyre sizes, i have seen that it seems that for a 17" wheel size , fitting a tyre of the spec such as 225/45/17 is the rule. A few agreements here would be confirmation that its way to go unless ???????

I've been using various 225/45/17 Tyres on my 147 GTA's 17" wheels since delivery in 2005.

abr4r · #4 (**Post Link**) 19-06-12

i forgot to mention speed rating , is a H rated tyre ok for the ts or should it be the next level up with a V rateing?

David C · #5 (**Post Link**) 19-06-12

Originally Posted by abr4r

i forgot to mention speed rating , is a H rated tyre ok for the ts or should it be the next level up with a V rateing?

The only 166 manual I have only has 3.2v6 & 2.4JTD and they need "Y".
But 100% you CAN NOT use "H" rated summer tyres on any 166.

a17esh · #6 (**Post Link**) 20-06-12

215 45 17s work too!! Ive got a spare Avon for sale £50

purple145 · #7 (**Post Link**) 20-06-12

I have 235/45/17s on mine, because KwikFit put on the wrong ones. Chumps.

a17esh · #8 (**Post Link**) 20-06-12

Wont that cause bad tyre wear?

mick164 · #9 (**Post Link**) 20-06-12

..don't forget the load rating as well. A tyre for a corsa will have a more flexible sidewall and this has an effect ride/handling etc..

One size either side of the 225 probably won't make that much difference, but you're better off with the right size i reckon.. 215s will also have marginally less sidewall, and 235s more. This effects turn-in, ride etc too..

It's also worth keeping in mind that one manufactures 225 isn't necessarily the exact same width as another's 225.. if you're ever tight for space this can catch you out unexpectedly

AlfaMartini · #10 (**Post Link**) 20-06-12

Originally Posted by abr4r

i forgot to mention speed rating , is a H rated tyre ok for the ts or should it be the next level up with a V rateing?

Your 2.0 litre TS will require a minimum speed rating of V (up to 149mph/240kph), although W (up to 168mph/270kph) would be a safer option. The max all-up gross weight of your car is 4255 lbs/1930 kgs (which is 1064 lbs/483 kgs per tyre) therefore your minimum load rating should be 90W (1323 lbs/600 kgs) or 91W (1356 lbs/615 kgs).

So your minimum spec should be 225/45/17-90W.... However as the standard tyre size for the 166TS is 205/55/16, you'll need to be sure that the 225/45/17's will not contact the front wings at full lock.

purple145 · #11 (**Post Link**) 20-06-12

Originally Posted by a17esh

Wont that cause bad tyre wear?

it has on the back, although the difference is 5mm each side, so I suspect the Eibachs more

abr4r · #12 (**Post Link**) 20-06-12

Originally Posted by AlfaMartini

Your 2.0 litre TS will require a minimum speed rating of V (up to 149mph/240kph), although W (up to 168mph/270kph) would be a safer option. The max all-up gross weight of your car is 4255 lbs/1930 kgs (which is 1064 lbs/483 kgs per tyre) therefore your minimum load rating should be 90W (1323 lbs/600 kgs) or 91W (1356 lbs/615 kgs).

So your minimum spec should be 225/45/17-90W.... However as the standard tyre size for the 166TS is 205/55/16, you'll need to be sure that the 225/45/17's will not contact the front wings at full lock.

ic thanks, however u mention full lock contact, i'm looking also to fit eibach springs shortly also , will that also effect the height issue betrween the wings & 17"s that i plan to fit

AlfaMartini · #13 (**Post Link**) 20-06-12

Originally Posted by abr4r

ic thanks, however u mention full lock contact, i'm looking also to fit eibach springs shortly also , will that also effect the height issue betrween the wings & 17"s that i plan to fit

I fitted an Eibach spring kit to my GTA (lowered by 3.5cm all round), and I've never experienced body/wing contact... however 225/45/17 tyres are standard for the GTA. But if they don't foul the wings on your standard springs, I doubt that lowering the ride height will have any adverse effect (but it does depend upon the amount of height reduction you are aiming for),

David C · #14 (**Post Link**) 20-06-12

Originally Posted by AlfaMartini

...however 225/45/17 tyres are standard for the GTA.

They are the std 17" size for a 166 too.

AlfaMartini · #15 (**Post Link**) 20-06-12

Originally Posted by David C

They are the std 17" size for a 166 too.

Standard tyre sizes for the 166 are listed as 205/55/16 or 215/55/16 as indicated here...

ALFA ROMEO 166 2.0 TS (1998 - 2003) Technical Specifications & Features
ALFA ROMEO 166 2.0 TS (2003 - 2007) Technical Specifications & Features
ALFA ROMEO 166 2.5 V6 (1998 - 2003) Technical Specifications & Features
ALFA ROMEO 166 3.0 V6 (1998 - 2003) Technical Specifications & Features

However abr4r should double check on the applicability for his car.

David C · #16 (**Post Link**) 20-06-12

Originally Posted by AlfaMartini

Standard tyre sizes for the 166 are listed as 205/55/16 or 215/55/16 ...

Have a look in a 166 manual, all the std & optional homologated sizes will be in there and the 17" is 225/45R17 91Y.

paul.o · #17 (**Post Link**) 20-06-12

Some strange things listed in there , fog lights - optional

David C · #18 (**Post Link**) 20-06-12

Originally Posted by paul.o

Some strange things listed in there , fog lights - optional

Probably are in some markets.

AlfaMartini · #19 (**Post Link**) 20-06-12

Originally Posted by David C

Have a look in a 166 manual, all the std & optional homologated sizes will be in there and the 17" is 225/45R17 91Y.

You are quite right David, I've just checked an online 166 owners manual which lists 215/55/16 tyres as standard, with 225/45/17 as an option, (and standard on the "Distinctive" version)... which illustrates why I advised that abr4r should double check on the applicability for his car.

However this does clarify that 225/45/17's should not pose any problems with his car.

Thanks for the info'.

paul.o · #20 (**Post Link**) 20-06-12

Originally Posted by David C

Probably are in some markets.

Love to find a picture of that

a17esh · #21 (**Post Link**) 20-06-12

Some V6s need special 16s tho...dont they?

mick164 · #22 (**Post Link**) 20-06-12

..yeah, the 16"s on the 2.0 cars are 6.5j, but the V6 cars with the brembos use a wider 7j 16" wheel. The 6.5j wheels won't clear the calliper i think.

disgusted · #23 (**Post Link**) 26-06-12

Why the gun abr4r?

Are you about to shoot your 166?

abr4r · #24 (**Post Link**) 27-06-12

thankfully not yet, after about a year of ownership only a faulty starter motor & broken window switch have given cause for concern

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