Tyres (lol)

[JelT5]

Shall I stick with 205/45s when I get my Titans refurbed or go up to 215/45s? There seems to be a wider choice of tyres available in 215 size...thinking about yoko paradas (if the budget allows!).

Any rubbing issues with fitting 215s (oooer missus)

Cheers

[PaulZX]

I had 215/45-17's on the fridge mover, with no issues regarding rubbing/bodywork contact.... But I got my best 1/4 mile times with 16" columbas running 50 profile toyo proxes t1-s bald tyres at 23psi

[JelT5]

Just as I thought mate- taller profile is always better on the 1/4.

I won't be buying separate sets of wheels just yet though, so will prob go for 215s if there are no rubbing issues. Thanks Paul

[PaulZX]

It's all about tyre wall flex. Too much and the rim spins inside the tyre, too little and it will bring on wheelspin easier.... you need some flex in the tyre wall o give you the spring off the line... the right wheel/tyre/pressure choice will knock almost a second off your time, if you had the wrong size on there to start with....

[Alan M]

Vredestein Ultrac Sessanta's 215-40-17. Great tyres with excellent grip and the better option in size over 215-45-17.

[t5_monkey]

Good experiences with Vredsteins here too...

[t5 pete]

i use 215/40/17 michelin and there fine with no isues at all

[PaulZX]

for 1/4 mile times you need a tyre wall of at least 50 profile..... it's all about the flex, baby!

[Storm-Troll]

Nooooooooooo go for 225/40 s lol thats what I got.. we pay road tax so have wide tires and use more of the road pmsl..

[JelT5]

for 1/4 mile times you need a tyre wall of at least 50 profile..... it's all about the flex, baby!

FFM, I know looks like I'll have to get some wheels for the strip too lol

[JelT5]

Nooooooooooo go for 225/40 s lol thats what I got.. we pay road tax so have wide tires and use more of the road pmsl..

LOL...we don't pay it here though one off tax payment of €170 when I finally get round to getting French plates on my car!

[JelT5]

Vredestein Ultrac Sessanta's 215-40-17. Great tyres with excellent grip and the better option in size over 215-45-17.

Thanks Alan; what about the speedo though? Won't that be out by a bit with 40 profile tyres?

[Crazy_C]

I can't really comment on this one, I run 195 / 50 / 15 tyres on my 850 and to be honest, I've had no issues going to a narrower tyre at all and I'm running higher boost than stock too

[PaulZX]

Thanks Alan; what about the speedo though? Won't that be out by a bit with 40 profile tyres?

the speedo on most cars is out by an mph or two, at least.... Mine was 6mph out at 70mph, with 215/45-17's on....(ie reading 70mph on the clocks, but doing 64mph gps)

[p fandango]

Thanks Alan; what about the speedo though? Won't that be out by a bit with 40 profile tyres?

LINK

i'm going upto 225 on BT (225/45/16), the grip is alot better than the original width's. I've got 240 wide Yokohama slicks ready for the strip

[siamblue]

I run 225/45/17 on my R, hardly even spins up, but i do have a M59 box

[JelT5]

LINK

i'm going upto 225 on BT (225/45/16), the grip is alot better than the original width's. I've got 240 wide Yokohama slicks ready for the strip

Thanks Ped

Btw I left a special msg for you on my "new baby thread" you'll like it mate, no really, you will

[JelT5]

I run 225/45/17 on my R, hardly even spins up, but i do have a M59 box

[Alan M]

Thanks Alan; what about the speedo though? Won't that be out by a bit with 40 profile tyres?

40 is the aspect ratio which is basically a percentage calculation of the tyre width which if worked out on the 215 size is not much different to the 205-45 size. I think the rolling radius is very similar on the 215-40 compared to the 205-45. I have experienced no real change in speedo speeds compared with GPS speeds with before and after runs on different sizes.

[JelT5]

40 is the aspect ratio which is basically a percentage calculation of the tyre width which if worked out on the 215 size is not much different to the 205-45 size. I think the rolling radius is very similar on the 215-40 compared to the 205-45. I have experienced no real change in speedo speeds compared with GPS speeds with before and after runs on different sizes.

Thanks (yet) again Alan