SwissTony

iTrader: (19)

Ok...I am getting my Rota's changed out due to my insurance sorting me out with a full set. Same style as I have, just different colour. So wheels are sorted
However I never have been keen on the tyres I have as they are like blooming rubber bands (toyo's), so using the picture below (which has the details), can you tell what is the best size I can get for my classic, which is not lowered at all. Standard springs etc. Ideally I want the largest wall on a tyre I can have, without any rubbing or having to roll my arches.

simo

215/40 or 225/35 should both fit. I ran 225/35 on my P1 without a problem.

SineSTI

This is 18"x7,5, and I think that P1's are 18"x8 so 235 is maybe too much.

SwissTony

iTrader: (19)

I know this may sound a bit thick, but I really am a numptie on tyre sizes..call it a mental block and alll..but is
215, 225 etc the width in mm across the tyre and 40, 35 etc the wall depth in mm ?? sorry for such a newbie question

corradoboy

215, 225 etc is width in mm: 35, 40, 45 etc is profile as a percentage of the width.

Hence, a 225/35/18 will have a total diameter of 614.7mm.

wheel 18"x25.4 (mm) = 457.2

225x35% = profile 78.75

profile x2 + wheel = 614.7mm total diameter

corradoboy

TYRESAVE: Tyre Size Calculator

SwissTony

iTrader: (19)

that is great thx mate , but whilst that all makes my head hurt , could you just explain in real laymans terms what is the widest depth of wall I can have on that wheel?
for example is 215/40 the same as 225/35 due to the percentage?
please feel free to laugh at my lack of understanding

corradoboy

It depends on whether you want it to foul the arches and how far out you want your speedo. Not too sure on what fits best on classics, but the general opinion is that 18's ruin both ride and handling. If you must have 18's then 215/40/18, if you go 17's then 215/45/17.

stevey

iTrader: (2)

always thought it was 215 40 17 or 205 45 17, anyways wheres the pic

SwissTony

iTrader: (19)

cheers, yes I do know about the ride and handling..it is a compromise to be honest, I used to have OZ 17"s on there and I do feel the difference. anyhow, the info you have supplied is perfect..215/40/18 will be the ticket.

stevey...are you talking about the pic i put in the first post??

stevey

iTrader: (2)

sorry tony that was aimed at dave

corradoboy

Sorry Stevey, I haven't got a digital camera and have been meaning to borrow the sis-in-laws for weeks. Need it for a few other reasons now so very soon, I promise.

Tony, I'd get them to fit one 215/40/18 and try it on the front and have a good look around it for signs of fouling. Should be OK, but better to be sure.

SwissTony

iTrader: (19)

cheers guys or dave

Will sort this out when the wheels come in....


I dont want to know why you need the digital camera for other reasons !!!

corradoboy

I've seen some of your photo's, maybe you want to see mine

SwissTony

iTrader: (19)

I seen yours as well...I seem to remember a pic of someone's **** running away on a stoney beach

SwissTony

iTrader: (19)

how did we get from tyre choice to that

Hepy

For a classic 225/35 is the correct size. Well that's what they had on the P1 if you opted for the 18's. 18's on a P1 are also 18x7.5

SwissTony

iTrader: (19)

oh you guys..now I have another choice ..grrr !!!

SwissTony

iTrader: (19)

apologies for bumping this up, I just need a definitive answer before I go and choose the wrong tyres...


thx