Tyres/Wheels For Fiesta ST

[dotdog]

Hello,
Not a suspension and brakes topic, so apologies for that, but there is no wheel/tyre section..
My question is - I have a 2016 ST fiesta on 205/40/17 and am thinking of changing to 195/55/15 as a back up set for the awful roads where I live - is this safe? (Rolling diameter is the same with this swap) and what tyre pressures suggested? (Current ST on the 205/40/17 is 36F and 26R.
Thanks in advance.

[dotdog]

Thanks for feedback - I have been looking at various forums and pics from USA where people have been asking about this with relation to winter tyres etc - seems you can go down to 15" (with 195/55/15)- but it depends on the spoke style as to whether they will fit over the brakes. 16" seems to be fine - so looking at 205/45/16 still on 7" which should improve the ride a bit or perhaps 195/50/16, although this seems to be a rarer size and thus more expensive and would also mean coming down from 7" rim to 6"..
There is also an issue with having to have the TPMS (tyre pressure monitoring system)valves installed in the new tyres - pain in the arse and additional cost. Have been speaking to Wheelbasealloys.com who have been helpful (and am considering their very nice Wolfrace alloys.

Edited by dotdog on Sunday 5th March 08:38

Edited by dotdog on Sunday 5th March 08:39

[dotdog]

Okay - got all that.. Thanks.. as said 205/45/16 pretty easy swap - but probably wont make that much difference - also it's turning out to be hard to find 7j width of rim with 16" wheel - well, nice ones anyway where the offset is not too compromised (another whole issue!)and the 205s need a 7J rim.
SOooo.. looks like I may well be going down to 195/50/16s on a 16x6j rim which will mean higher profile and more lateral movement of the tyre on the rim. There is a Wolfrace available for this in matt black:

http://www.wheelbasealloys.com/alloy-wheels/wolfra...


I only do road driving and therefore will be happy to sacrifice ultimate grip in favour of a more forgiving ride and it may even make the handling a bit more progressive - which I like. Tyre choice will either be the Dunlop Sport Blue Response (which I ran on a classic impresa and are good tyres), or the new Yokohama Advan Fleva V701.
If I do this I will post some pics of the new wheel/tyre comb.

[dotdog]

http://www.carbibles.com/tyre_bible_pg4.html

Have been using this calculator - looked at the one you suggested and yes does say it's okay - hmm - even more lateral movement of the tyre with 205 on 6j... not sure if maybe too much..

[dotdog]

group hug lol