Z4-forum.com

Hi guys,

Need some wheel and tyre help please for my E86 3.0si

Currently looking to swap out my CSL reps to a new set of Ispiri FFR6’s in Carbon Graphite but hoping to still use my existing tyres.

https://www.ispiriwheels.com/ispiri-ffr6.html

Can you please tell me whether the a) the new alloys fit and b) can I use my existing tyres without any issues?

Alloys Offsets:
Fronts - 19x9" ET35
Rears - 19x10" ET42

Current tyres:
Fronts - 225/35/19
Rears - 255/30/19

Look forward to any suggestions and help.

Thanks

I believe forum member @Rally has these and they fit perfect. Not 100% on tyre sizes.

Thanks yes, did see his Imola M, one of the reasons why I have considered these wheels!

tee.gilding wrote: ↑Mon Apr 15, 2019 7:56 am I believe forum member @Rally has these and they fit perfect. Not 100% on tyre sizes.

///M fitment different to Si though & a 9jet35 on 3.0coupe will run the liner unless Se springs & rubber band tyres.
Also putting 255-30-19 tyres on a 10j rim might as well paint them on
More study required Op

mr wilks wrote: ↑Mon Apr 15, 2019 10:06 am

tee.gilding wrote: ↑Mon Apr 15, 2019 7:56 am I believe forum member @Rally has these and they fit perfect. Not 100% on tyre sizes.

///M fitment different to Si though & a 9jet35 on 3.0coupe will run the liner unless Se springs & rubber band tyres.
Also putting 255-30-19 tyres on a 10j rim might as well paint them on
More study required Op

I Had 255/30's on my 19'' 10j rim with no issues. Car was lowered on either FK springs or eibachs also.

Thats 19x10 et35 by the way, so the rears will fit fine on your car.

ben g wrote: ↑Mon Apr 15, 2019 10:52 am

mr wilks wrote: ↑Mon Apr 15, 2019 10:06 am

tee.gilding wrote: ↑Mon Apr 15, 2019 7:56 am I believe forum member @Rally has these and they fit perfect. Not 100% on tyre sizes.

///M fitment different to Si though & a 9jet35 on 3.0coupe will run the liner unless Se springs & rubber band tyres.
Also putting 255-30-19 tyres on a 10j rim might as well paint them on
More study required Op

I Had 255/30's on my 19'' 10j rim with no issues. Car was lowered on either FK springs or eibachs also.

Thats 19x10 et35 by the way, so the rears will fit fine on your car.

DSC_0341.JPG

DSC_0342.JPG

Not a pretty look tho & the rub I meant was with the 9jet35 front not the rear

mr wilks wrote: ↑Mon Apr 15, 2019 11:13 am

ben g wrote: ↑Mon Apr 15, 2019 10:52 am

mr wilks wrote: ↑Mon Apr 15, 2019 10:06 am

///M fitment different to Si though & a 9jet35 on 3.0coupe will run the liner unless Se springs & rubber band tyres.
Also putting 255-30-19 tyres on a 10j rim might as well paint them on
More study required Op

I Had 255/30's on my 19'' 10j rim with no issues. Car was lowered on either FK springs or eibachs also.

Thats 19x10 et35 by the way, so the rears will fit fine on your car.

DSC_0341.JPG

DSC_0342.JPG

Not a pretty look tho & the rub I meant was with the 9jet35 front not the rear

Depends what your preference is. I didn't mind it. It looked pretty enough for everyone to comment on how lovely the car looked

The ride on standard sized tyres is dreadful at best, so it wasn't actually too bad on these.

Looks very well indeed but I wouldn't fancy covering any spirited miles.
What were the front width /offset & tyre size?

mr wilks wrote: ↑Mon Apr 15, 2019 11:25 am Looks very well indeed but I wouldn't fancy covering any spirited miles.
What were the front width /offset & tyre size?

I believe they were 8.5x19 et35 or et38. Tyre size was 225/35/19 and they were a bit too stretched for my liking.

I did a road trip to Scotland in it and it felt perfectly fine to both myself and the missus, though I was a lot younger back then. Not sure my back could take it now

Thanks for the input guys, much appreciated.

I bought the car with normal springs on the front and eibachs on the rear, so hopefully front would be OK?

However, the rear wearing not much rubber may be a concern...

Machpb wrote: ↑Mon Apr 15, 2019 2:50 pm Thanks for the input guys, much appreciated.

I bought the car with normal springs on the front and eibachs on the rear, so hopefully front would be OK?

However, the rear wearing not much rubber may be a concern...

265-30 or 275-30 on the rears will be fine.
9j front is want 235-35-19 & with et35 I'd be concerned about rubbing on lock & compression.
225-35 on 9j "might" solve that but can't imagine it would look great..
For ref I have a set of Veemann 19s.
8.5j front et35.
They rubbed on my front arches on the Si coupe with 235-35 tyres.

Andy, I definitely think you should do a definitive sticky post on what tyre/wheel combo will work for each Z variation. Your knowledge here is oracle....so would massively help the masses.

Maybe you can explain the differences between ET and tyre sizing...something like...

- Optimal Set Up for Daily Driver (looks and ride)
- Maximum size for looks
- Track for handling

Thanks for all the help guys, I appreciate all the input.

It has led to a rethink about what alloys may be a better fit. Therefore now considering the ISR10’s instead.

Would 19" x 8.5" et15 front and 19" x 10" et22 rear be any better or am I worse off using the same tyres?

Apologies, not a clue when it comes to offsets and tyres!

They would be sitting outside of the arches like a monster truck

The lower the et number. The further out the alloys will fit.

Bloody hell, skip that idea then!

Thanks for the heads up - think I'll have a chat with CM wheels or someone who can guide me from the get go.