Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.
RFTs and mixing
-
- Newbie
- Posts: 3
- Joined: Tue Jun 12, 2018 12:48 pm
RFTs and mixing
Hi All,
Had my Z4 about 4 months now and loved it up until about 4 days ago. Fail MOT due to uneven tyre wear, inner edge to the cord and outer at 6mm on both rears. I wanted to get the runflats off so thought this a good opportunity to start with the rears. Replaced with Dunlop sport maxx rt 2's. Just had a 4 wheel alignment done as well.
Car handles like a drunk wasp. Anyone else experienced this? Heard mixing rft and nrft front and rear is a big no. Looking for some advice before I fork out for the fronts as well.
Tramlining is now terrifying above 60mph. More like George Clooneys boat in a perfect storm. Guess theres a little getting used to with the raised tread wall and softer wall.
Anyone else?
Had my Z4 about 4 months now and loved it up until about 4 days ago. Fail MOT due to uneven tyre wear, inner edge to the cord and outer at 6mm on both rears. I wanted to get the runflats off so thought this a good opportunity to start with the rears. Replaced with Dunlop sport maxx rt 2's. Just had a 4 wheel alignment done as well.
Car handles like a drunk wasp. Anyone else experienced this? Heard mixing rft and nrft front and rear is a big no. Looking for some advice before I fork out for the fronts as well.
Tramlining is now terrifying above 60mph. More like George Clooneys boat in a perfect storm. Guess theres a little getting used to with the raised tread wall and softer wall.
Anyone else?
E89 23i M-Sport
- Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
RFTs and mixing
It’s not recommended but I ran runflat fronts with normal rears & I could drive it hard round corners with no problems.
With tyre wear like that I’d be getting an alignment carried out pronto
Rob
With tyre wear like that I’d be getting an alignment carried out pronto
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
-
- Lifer
- Posts: 4045
- Joined: Sat May 25, 2013 8:27 pm
- Location: Stourbridge
RFTs and mixing
I ran rft front with new non rft Goodyear rears.
After a week i replaced the fronts with Goodyear non rft.
The steering was awful.
I think the rears were less rigid and allowed the car to natural absorb the bumps and wobbles, whereas the fronts were just doing there own thing and fighting the rears.
Trying to save a few quid, didn't work out.
After a week i replaced the fronts with Goodyear non rft.
The steering was awful.
I think the rears were less rigid and allowed the car to natural absorb the bumps and wobbles, whereas the fronts were just doing there own thing and fighting the rears.
Trying to save a few quid, didn't work out.
-
- Newbie
- Posts: 3
- Joined: Tue Jun 12, 2018 12:48 pm
RFTs and mixing
Cheers flybobbie, yea i guess im experiencing something similar. On a dual carriageway its all over the place. You know what pressures you're running. Specialist just recommend 40 rear (standard) and 36 front (rtf) Thanks.
E89 23i M-Sport
- Tyreman
- Member
- Posts: 389
- Joined: Thu Jun 11, 2015 9:01 pm
- Location: Staffordshire
RFTs and mixing
The handling characteristics of runflat & non runflat are totally different so shouldn't be mixed...........get them off
-
- Senior Member
- Posts: 2811
- Joined: Sun Nov 20, 2016 2:49 am
RFTs and mixing
Yeah, found a couple of cross-ply in the garage. Trouble is they're both a bit old. Mind you, the two radials I've got are, too.spence89 wrote: ↑Tue Jun 12, 2018 9:25 pm Hi All,
Had my Z4 about 4 months now and loved it up until about 4 days ago. Fail MOT due to uneven tyre wear, inner edge to the cord and outer at 6mm on both rears. I wanted to get the runflats off so thought this a good opportunity to start with the rears. Replaced with Dunlop sport maxx rt 2's. Just had a 4 wheel alignment done as well.
Car handles like a drunk wasp. Anyone else experienced this? Heard mixing rft and nrft front and rear is a big no. Looking for some advice before I fork out for the fronts as well.
Tramlining is now terrifying above 60mph. More like George Clooneys boat in a perfect storm. Guess theres a little getting used to with the raised tread wall and softer wall.
Anyone else?
Anyway, just to be safe, put one of each on each side.
But like yours, spence89, car handles like a drunk wasp.
Vidi, vici, veni
-
- Lifer
- Posts: 4045
- Joined: Sat May 25, 2013 8:27 pm
- Location: Stourbridge
RFTs and mixing
Have been running 42 rear and 38 front.
Have been thinking after seeing wear pattern, the rears should be slightly lower, so 40 is probably a good bet.
(Goodyear asymmetric 2)
-
- Senior Member
- Posts: 2811
- Joined: Sun Nov 20, 2016 2:49 am
RFTs and mixing
Did the specialist recommend 'standard' tyres on the front and rfts on the rear?
Vidi, vici, veni
- DPG
- Lifer
- Posts: 4204
- Joined: Sat Sep 27, 2008 10:41 pm
- Location: West Yorks
RFTs and mixing
Kwik-Fit refused to put standard tyres on the front of my E86 with RFT's on the back.
-
- Member
- Posts: 589
- Joined: Wed Jul 09, 2014 1:31 pm
- Location: Bristol
RFTs and mixing
Funnily enough, I have brand new Dunlops on the rear of mine, and the OEM RFTs on the front at the moment (as a temporary measure - aim is to have the same on the front as the rear within the month). I went out in the car last night and it does seem a little twitchy where before (on winters all round) it wasn't.spence89 wrote: ↑Tue Jun 12, 2018 9:25 pm Hi All,
Had my Z4 about 4 months now and loved it up until about 4 days ago. Fail MOT due to uneven tyre wear, inner edge to the cord and outer at 6mm on both rears. I wanted to get the runflats off so thought this a good opportunity to start with the rears. Replaced with Dunlop sport maxx rt 2's. Just had a 4 wheel alignment done as well.
Car handles like a drunk wasp. Anyone else experienced this? Heard mixing rft and nrft front and rear is a big no. Looking for some advice before I fork out for the fronts as well.
Tramlining is now terrifying above 60mph. More like George Clooneys boat in a perfect storm. Guess theres a little getting used to with the raised tread wall and softer wall.
Anyone else?
10-plate E89 35i, Deep Sea Blue
67-plate F15 X5 35d, Space Grey
67-plate F15 X5 35d, Space Grey
-
- Senior Member
- Posts: 2811
- Joined: Sun Nov 20, 2016 2:49 am
- mr wilks
- Legend
- Posts: 21897
- Joined: Wed Jul 04, 2012 10:02 pm
- Location: Lancashire
RFTs and mixing
If Its that dangerous you would expect it to be illegal or at very least a MOT fail
3 ZMRs
3 E89s
5 Si coupes
5 Si roadsters
997 C4
TTRS
F82 M4
MK7 Golf Gti
current Bmw 6 Gran Turismo
3 E89s
5 Si coupes
5 Si roadsters
997 C4
TTRS
F82 M4
MK7 Golf Gti
current Bmw 6 Gran Turismo
- Tyreman
- Member
- Posts: 389
- Joined: Thu Jun 11, 2015 9:01 pm
- Location: Staffordshire
RFTs and mixing
MOT is a bare minimum standard, the tyre legal limit is 1.6mm over the central 75% with no requirement for tread on the remainder.........
How many people think that's a desirable situation ?
- mr wilks
- Legend
- Posts: 21897
- Joined: Wed Jul 04, 2012 10:02 pm
- Location: Lancashire
RFTs and mixing
& how many are offering opinion based on internet reading as opposed to actual experience
For the very purpose of curiosity I recently tried a set of 19s for a good while on a E86 Si , rears were standard , fronts were runflat ( all quality brand & 5mm minimum )
Ive run countless sets of different wheels & tyres on a variety of different Zs , out on the road in all manner of driving there was no way the mixed tyre set up showed up & whilst not doing track speeds i was more than enjoying the car , roads & speed limits .
The simple truth is no , its not desirable & no you wouldn't actively seek it out as a option but its by no means the lethal danger some would like you to believe .
3 ZMRs
3 E89s
5 Si coupes
5 Si roadsters
997 C4
TTRS
F82 M4
MK7 Golf Gti
current Bmw 6 Gran Turismo
3 E89s
5 Si coupes
5 Si roadsters
997 C4
TTRS
F82 M4
MK7 Golf Gti
current Bmw 6 Gran Turismo
- hopz121
- Lifer
- Posts: 3711
- Joined: Sun Jul 03, 2011 4:33 pm
- Location: Guildford Surrey
RFTs and mixing
What are your alignment results OP?
Also if you had non run flats on the front why didn’t you replace the rears with the same? Or have I got it the wrong way around and the new rears are non runflats?
Also try 33/34 PSI Front and 35/36 PSI Rear
Also if you had non run flats on the front why didn’t you replace the rears with the same? Or have I got it the wrong way around and the new rears are non runflats?
Also try 33/34 PSI Front and 35/36 PSI Rear
2004 BMW E46 M3 Coupe - Manual - Silver Grey
2017 BMW F31 318d M-Sport - Auto - Glacier Silver
2007 Porsche Cayman 2.7 - Manual - Arctic Silver
2003 Renault Clio 172 Cup - Blue
2003 BMW E85 Z4 3.0i - Gone
2008 BMW E90 330i SE - Gone
2017 BMW F31 318d M-Sport - Auto - Glacier Silver
2007 Porsche Cayman 2.7 - Manual - Arctic Silver
2003 Renault Clio 172 Cup - Blue
2003 BMW E85 Z4 3.0i - Gone
2008 BMW E90 330i SE - Gone