It appears you have the original metric TRX tires and rims on your
car. TRX tires were developed by Michelin and I believe they actually
do a run of this size tires about once a year. However, the TRX
technology is over 20 years old and not considered very good by
What you need to do is THROW THOSE WHEELS AWAY and buy some new ones
that will fit normal tires. The advantage of getting new wheels and
tires are you can get the latest technology in tires using normal size
tires in 17, 18, 19 or even 20", depending on how big you want to go.
Many upgrade to 1988 BMW M5 wheels which are either 16x8 or 16x7.5.
The disadvantage are you'll have to come up with money to pay for
these new wheels and tires. However, at least for the wheels, that is
a one time expense and you can just get new tires thereafter.
As bfd says, you need to get new rims/tires. Best place is tirerack.com -
I believe it recommends 225/60R16.
And as I was typing before a power outage so rudely interrupted me (no UPS
on this computer), you should have gotten new tires 10 years ago, since
tires get brittle and lose grip as they age.
Those tires are a dismal experiment gone bad. You are gonna have to buy new
rims and tires. Sorry for the bad news.
Frankly, you should look at this as good news. I drive a '94 3 Series that
came witht eh Sports Package that included 225/55x15 tires. Over time, this
tire size became obsolete for lack of a better term. In any case, to
continue with that tire size, I would be spending $250 per tire, mounted and
balanced and out the door. This seemed like too much money for tires, so I
shopped eBay for 17" rims. My car takes a full-size spare, so I needed 5
rims. I found them and got them to my house for about $600 including
shipping. This put the unit price at $120 per rim. I bought a 225/45x17 tire
to mount on the rims, and they ran me about $100 out the door. My initial
cost to shoe my car with 17s was equal to putting a set of 15s, but
subsequent sets of 17s are considerably cheaper than continuing with the
obsolete 15" size that came on the car.
Since the overall diameter is the same, and the width is also the same, then
my steering geometry hasn't changed appreciably, so the suspension still
works the same. Yes, I suppose the ride could be a bit stiffer due to lesser
sidewall height, but as a practical matter I can't tell any difference -- at
least a difference that makes me complain.
Thanks for all the info and opinions.
I was hopinig to find tires, as the car is perfect condition...and with
would eventually be worth more as an "all original equipment" car for
concoursing...(I know, I know...the resale value on 1988 M6's is like
nothing compared to other marques - Ferrari, Porsche, etc. etc....but one
can only hope).
Still looking for a solution (maybe I have to place an order with Michelin
for their once-a-year run)...
I see your point, and yes... if you are attempting to maintain the car
as 100% stock you can get the metric TRX tires. Michelin still made
them as recently as the past year, but they were the only ones. You
should be able to get some at a premium price.
So keep the TRXs you have for concourse shows and run 16" on the road.
They handle a LOT better, especially in the wet. You'll also be able to
keep your TRX cross spokes much cleaner. You could fit E38 7 series 16"
cross spokes which suit the car well and don't look too modern.
Who needs a life when you've got Unix? :-)
Email: firstname.lastname@example.org, John G.Burns B.Eng, Bonny Scotland
Well, they still make the TRX tires, but they are very costly. You could
retain the set you have for nostalgia purposes, and get a new set for
driving around on.
You could get BMW rims that fit the car and take the inch-size tires that
are more common, and less costly.
Personally, I think you probably have a nice car, and the original equipment
is worth having. But the reality is that current tire design surpasses the
performance tires you have, and are cheaper. If you can find some 5 Series
rims from the same era as your car, then you may be able to retain the
original look and fitment at a fraction of the cost of installing new TRX
Thanks for the additional information/postings....
I found a supplier for the tires: www.cokertire.com
$406 a pop...
Hmmmmm....could be better to buy new rims & tires...
Again, thanks for your help!
If you're going to *drive* the car, I'd strongly recommend that.
OTOH, if you simply want it to look original, there are very similar
BMW wheels in inch sizes. If you have the 'bottlecaps', there was a
14" and a 15" version of these. I have a set of the 14"s that I can
use to make my originally-TRX-shod 535is look 'stock'. But I drive on
either 15" E36-style or 16" TSW Hockenheims.
I don't recall whether your M6 might have had the BBS cross-spoke
wheels but, if it does, a set of the 16" BBS cross spokes from an E28
M5 would be perfect.
(Been there; won't buy those)
Are the holes for the wheel nuts in the same position?
You can either try and source these very expensive [Michlein] TRX tyres or
swap the wheels.
The main advantage of TRX was behaviour after puncture. The main
disadvantage is / was price (especally now) and wet performance.
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