Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
-
- Newbie
- Posts: 36
- Joined: Sat Jun 26, 2021 9:38 pm
- Location: London
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
Has anyone changed the tyres on the rear of an E89 to a different profile?
The tyres need replacing this week (slow puncture isn’t so slow anymore!) and looking around, 255/35/19 are half the price of 255/30/19, and I assume the ride comfort may benefit. In real terms it means a change in diameter of 25mm, so 12.5mm extra height from the centre.
I’m concerned it’ll rub (biggest concern) , or give incorrect data about milage / speed.
Thanks!
Chris
The tyres need replacing this week (slow puncture isn’t so slow anymore!) and looking around, 255/35/19 are half the price of 255/30/19, and I assume the ride comfort may benefit. In real terms it means a change in diameter of 25mm, so 12.5mm extra height from the centre.
I’m concerned it’ll rub (biggest concern) , or give incorrect data about milage / speed.
Thanks!
Chris
- sars
- Lifer
- Posts: 7040
- Joined: Sun Feb 21, 2010 11:37 am
- Location: East Yorkshire
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
It’s been done quite a few times by other forum members here, the plus is improved comfort and less risk to some of the fragile 19” rims. The downside is a slight reduction in both acceleration and fuel efficiency.Braveatom wrote: ↑Sun Feb 12, 2023 7:32 pm Has anyone changed the tyres on the rear of an E89 to a different profile?
The tyres need replacing this week (slow puncture isn’t so slow anymore!) and looking around, 255/35/19 are half the price of 255/30/19, and I assume the ride comfort may benefit. In real terms it means a change in diameter of 25mm.
I’m concerned it’ll rub (biggest concern) , or give incorrect data about milage / speed.
Thanks!
Chris
Gorgeous SFR Z4 M40i
Gone 2017 Iridium SL400, 2015 435d xDrive Convertible, 2012 E350 CDi Convertible, 2010 DSB Z4 sdrive30i, 2008 Audi A4 Cabriolet, 2006 Phoenix Yellow Z4 2.5Si, 2003 Saab 9-3 Convertible
Gone 2017 Iridium SL400, 2015 435d xDrive Convertible, 2012 E350 CDi Convertible, 2010 DSB Z4 sdrive30i, 2008 Audi A4 Cabriolet, 2006 Phoenix Yellow Z4 2.5Si, 2003 Saab 9-3 Convertible
-
- Lifer
- Posts: 8508
- Joined: Wed Jan 20, 2021 7:20 pm
- Location: Spaldingski
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
I have 255/35/19 on the rear of my E89 (M-sport suspension). No rubbing problems whatsoever. There is at least 20mm arch gap. Remember you only lose half of the diameter increase in arch gap, as the car rides higher by the other half.
3% speedo difference so will probably make it more accurate as analogue speedos are notorious for being 'optimistic'.
The extra tyre wall should also help a little with comfort and help against wheel cracking.
Not had any DSC issues either.
3% speedo difference so will probably make it more accurate as analogue speedos are notorious for being 'optimistic'.
The extra tyre wall should also help a little with comfort and help against wheel cracking.
Not had any DSC issues either.
All good things come to those who wait. I'm really impatient which explains a lot.
F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!
F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!
- Mr Tidy
- Legend
- Posts: 23852
- Joined: Wed Jul 02, 2014 12:18 pm
- Location: North West Surrey
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
Not an E89 admittedly but I fitted 255/45 x 18 to the rear of my Z4M instead of the OE size of 255/40 x 18 with no issues - if anything it has made the speedo more accurate!
In your case the diameter of the tyre is only going up 5% of 255mm so that's only 12.75mm. Which means you only need another 6.375mm clearance in the wheel-arch.
In your case the diameter of the tyre is only going up 5% of 255mm so that's only 12.75mm. Which means you only need another 6.375mm clearance in the wheel-arch.
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black
-
- Lifer
- Posts: 8508
- Joined: Wed Jan 20, 2021 7:20 pm
- Location: Spaldingski
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
That's the radius Iain. Diameter is double that, so 25.5mm.
All good things come to those who wait. I'm really impatient which explains a lot.
F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!
F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!
-
- Senior Member
- Posts: 1120
- Joined: Sat Aug 08, 2020 7:45 pm
- Location: Tamworth
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
I’ve been running 255/35/19 rears for a few years and definitely no rubbing. Can’t say I’ve noticed any change to the accuracy of the Speedo either but a big improvement in comfort (set at 36psi) over the runflats that the current tyres replaced.Braveatom wrote: ↑Sun Feb 12, 2023 7:32 pm Has anyone changed the tyres on the rear of an E89 to a different profile?
The tyres need replacing this week (slow puncture isn’t so slow anymore!) and looking around, 255/35/19 are half the price of 255/30/19, and I assume the ride comfort may benefit. In real terms it means a change in diameter of 25mm, so 12.5mm extra height from the centre.
I’m concerned it’ll rub (biggest concern) , or give incorrect data about milage / speed.
Thanks!
Chris
Speed Yellow Porsche Boxster S
Previous:
Melbourne red 2016 20i MSport with a few subtle mods
Titanium Silver 2004 3.0SE with run flats
Previous:
Melbourne red 2016 20i MSport with a few subtle mods
Titanium Silver 2004 3.0SE with run flats
-
- Newbie
- Posts: 36
- Joined: Sat Jun 26, 2021 9:38 pm
- Location: London
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
Wow, thanks for all the great replies, it’s exactly the info I was after and then some.
Think I’ll do it - it appears to be a net benefit. Both my rear alloys are cracked and need sorting, so saving £250 on a pair of tyres is really gonna ease the pain.
Think I’ll do it - it appears to be a net benefit. Both my rear alloys are cracked and need sorting, so saving £250 on a pair of tyres is really gonna ease the pain.
- Argyll Andy
- Lifer
- Posts: 5346
- Joined: Mon Oct 21, 2019 10:16 pm
- Location: Argyll & Bute
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
I went up to 265/30/19 with no issues. The increase to the sidewall because of the slightly wider tyre gave a bit more protection to the rim
G29 M40i Thundernight with Ivory interior, all option packs (here for a while, hopefully )
G29 M40i Misano Blue all option packs (Gone 26k of fun)
E89 35iS, Valencia Orange, Design Pure Traction pack (Gone)
E89 23i sDrive, Silver (Gone)
-
- Member
- Posts: 87
- Joined: Mon May 17, 2021 6:42 pm
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
I thought about doing this myself with the rear tyres - as all 4 need replacing on mine.
Which is the best website to purchase tyres online ?
Which is the best website to purchase tyres online ?
2010 E89 Z4 - 23i M Sport - Deep Sea Blue
2004 E46 BMW 320d Sport - Mystic Blue (Daily)
-
- Lifer
- Posts: 8508
- Joined: Wed Jan 20, 2021 7:20 pm
- Location: Spaldingski
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
Unless you can get them fitted for free, I've not seen a saving on buying online TBH.Z4Shane007homas wrote: ↑Thu Feb 16, 2023 8:35 pm Which is the best website to purchase tyres online ?
I just ring round my local tyre garages and get quotes for the tyres I want. One or other usually beats the online people.
When I lived in your area, I always used the tyre garage in Piddington (on the A40 past West Wycombe going towards Stokenchurch). Or Adams & Page on Cressex estate.
All good things come to those who wait. I'm really impatient which explains a lot.
F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!
F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!
- ronk
- Lifer
- Posts: 14227
- Joined: Tue Feb 24, 2009 11:50 am
- Location: Durham
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
Im going to buy new tyres in the spring and will probably do 35 profile rears - it seems well documented that its ok - but should the fronts just remain at the standard 35 profile?
Currently looking at the Conti Contact 7's
Currently looking at the Conti Contact 7's
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with.
So I bought a 35is with all the toys to play with.
-
- Lifer
- Posts: 3223
- Joined: Sun Feb 10, 2019 2:10 pm
- Location: Bristol/Bath
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
Yes, 225/35/19 or 235/35/19 will work fine with 255/35/19 rears
My VO E89 had the 235/35/19 & 255/35/19 Combo, and I’m just about to fit 225/35/19 & 255/35/19 onto my DSB E89
The VO had 9J fronts and 10J rears - the DSB has 8J fronts and 9J rears.
Alpina Roadster S Lux no. 204 (1 of 15 uk cars in Alpina Blue)
Previous Z4’s :E89 30i, E89 20i, E85 3.0Si (X4) E85 3.0i, E86 3.0 Si, E85 2.5si, E85 2.5i
Previous Z4’s :E89 30i, E89 20i, E85 3.0Si (X4) E85 3.0i, E86 3.0 Si, E85 2.5si, E85 2.5i
- ronk
- Lifer
- Posts: 14227
- Joined: Tue Feb 24, 2009 11:50 am
- Location: Durham
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
Thanks.
Now the search begins.
I t think my choice is between Conti 7 snd Michelin ps4
The Conti do seem a lot cheaper- but some reports say they have a better feel.
Now the search begins.
I t think my choice is between Conti 7 snd Michelin ps4
The Conti do seem a lot cheaper- but some reports say they have a better feel.
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with.
So I bought a 35is with all the toys to play with.
-
- Member
- Posts: 877
- Joined: Sun Apr 26, 2015 7:16 pm
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
This seems to be a better shout than 255/35.Argyll Andy wrote: ↑Sun Feb 12, 2023 9:54 pm I went up to 265/30/19 with no issues. The increase to the sidewall because of the slightly wider tyre gave a bit more protection to the rim
-
- Lifer
- Posts: 3223
- Joined: Sun Feb 10, 2019 2:10 pm
- Location: Bristol/Bath
255/30/19 - ‘upgrade’ to 255/35/19 (E89)
Far more expensive thoughwarmasice wrote: ↑Tue Feb 28, 2023 6:12 pmThis seems to be a better shout than 255/35.Argyll Andy wrote: ↑Sun Feb 12, 2023 9:54 pm I went up to 265/30/19 with no issues. The increase to the sidewall because of the slightly wider tyre gave a bit more protection to the rim
Alpina Roadster S Lux no. 204 (1 of 15 uk cars in Alpina Blue)
Previous Z4’s :E89 30i, E89 20i, E85 3.0Si (X4) E85 3.0i, E86 3.0 Si, E85 2.5si, E85 2.5i
Previous Z4’s :E89 30i, E89 20i, E85 3.0Si (X4) E85 3.0i, E86 3.0 Si, E85 2.5si, E85 2.5i