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[TheBoy]

ok , to understand your experience and view I have few questions .. and I'll be glad if you answer them
 
when did you install sc5 (which month) ?
what was the temperature like on your daily commute road (like 0-10 celcius eg) ?
how will you define the roads (perfect asphalt, coarse, lots of curves etc) ?
whats the the distance you travel (going and coming back) ?
how can you define the road traffic (very crowded so you hardly move, crowded,empty etc) ?
what pressures you use ?
are they XL rating ?
whats your rating for SC5 for dry braking (90% eg) ?
                          "          dry cornering (80% eg) ?
                          "          wet braking (90% eg) ?
                          "          wet cornering (80% eg) ?
                                      tramlining     (90% eg) ?
is there any specific road condition,tyre pressure that you witnessed for tramlining ?

September 2012
Since then, varied from around 20C, maybe higher, to just below freezing. And snow. No real difference, bar grip levels
Fast dual carriageway, 50mph straight A roads (A5 - roman road, straight), urban, roundabout city (Milton Keynes). Road surface, variable, but mostly good asphalt, no real rutting.
28 miles each way, 56m round trip.
Traffic variable. Some days I can do it in 35mins, sometimes its 75 mins. Occasionally (once every few weeks), 2-3hrs.
Tried varying pressures, tried every PSI from 28 to 36.
No, as stated, 94
Ratings, with TT as the benchmark (TT being 100% on all, as its probably the best Omega tyre)
20%
75%
20%
75%
5%
No, tramlining is there all the time. Dual carriageway, A roads, B roads, unclassified roads, Motorway. And across all pressures I've tried.

[cem_devecioglu]

ok , to understand your experience and view I have few questions .. and I'll be glad if you answer them
 
when did you install sc5 (which month) ?
what was the temperature like on your daily commute road (like 0-10 celcius eg) ?
how will you define the roads (perfect asphalt, coarse, lots of curves etc) ?
whats the the distance you travel (going and coming back) ?
how can you define the road traffic (very crowded so you hardly move, crowded,empty etc) ?
what pressures you use ?
are they XL rating ?
whats your rating for SC5 for dry braking (90% eg) ?
                          "          dry cornering (80% eg) ?
                          "          wet braking (90% eg) ?
                          "          wet cornering (80% eg) ?
                                      tramlining     (90% eg) ?
is there any specific road condition,tyre pressure that you witnessed for tramlining ?

September 2012
Since then, varied from around 20C, maybe higher, to just below freezing. And snow. No real difference, bar grip levels
Fast dual carriageway, 50mph straight A roads (A5 - roman road, straight), urban, roundabout city (Milton Keynes). Road surface, variable, but mostly good asphalt, no real rutting.
28 miles each way, 56m round trip.
Traffic variable. Some days I can do it in 35mins, sometimes its 75 mins. Occasionally (once every few weeks), 2-3hrs.
Tried varying pressures, tried every PSI from 28 to 36.
No, as stated, 94
Ratings, with TT as the benchmark (TT being 100% on all, as its probably the best Omega tyre)
20%
75%
20%
75%
5%
No, tramlining is there all the time. Dual carriageway, A roads, B roads, unclassified roads, Motorway. And across all pressures I've tried.

ok.. after some search on UK drivers experiences with conti SC5 , they verify your complaints..
especially Mercedes owners..
 
this is their comment on SC5
"Compound remains hard and can't warm up enough to attain summer performance and can be noisy and slippery. "
 
 
yesterday, my view was that this tyre was not getting enough hot to perform well in the wet (apart from tramlining problem-but cant post my view as thread is locked) and as I see Mercedes owners share the same view about temp (despite your daily commute is enough long to heat an average tyre but however I found this info also interesting
 
   "The ContiSportContact 5 is Continental’s Max Performance Summer tyre. Initially developed to match the sporty driving characteristics of Mercedes-Benz SLK350 roadsters, the ContiSportContact 5 is designed to combine short braking distances and good cornering traction with reduced fuel consumption and good treadwear. However like all summer tyres, they are not intended to be driven in near freezing temperatures, through snow or on ice.
The ContiSportContact 5 uses Continental’s Black Chilli compound molded into an asymmetric tread design that features a macro-block outboard shoulder that adapts to the road surface to improve road grip and cornering stability. Four circumferential grooves channel water to resist hydroplaning and enhance wet traction. A continuous center rib and notched intermediate ribs promote steering response and straight-line tracking.
The ContiSportContact 5’s Black Chilli compound’s short-chain polymers react to braking forces by building heat to shorten braking distance on wet and dry roads, while the compound’s long-chain polymers release the absorbed energy more efficiently at constant speeds to reduced rolling resistance. Thus, the tyre stops faster and remains cooler for longer life and reduced fuel consumption.
The tyre's internal structure features twin steel belts reinforced with spirally wrapped polyamide (a mixture of heat-resistant synthetic aramid fiber and nylon threads) that enhances the ride quality while tuning the contact area's vertical flexibility and lateral rigidity.
"
 
so if I understand correctly its polymer structure releases heat quickly to have longer life and shorter braking distance, however, this specification doesnt help in UK autumn and winter weather.. because tyres cant heat up properly because of its design and definitely needs higher temperatures than your avg conditions..
 
) another hint can be Germany now completely forbid summer tyres in winter.. So Continental high likely design the compounds accordingly..
 
instead they find an alternative conti model for UK weather
Conti EC DWS.......
Ultra high performance all season Dry-Wet-Snow design.
 
I never hear about this model and never seen in any test
 
 
 
some specs for slk350 to compare the chasis and tyres..
 
curb weight: 1540 kg
power : 306 ps (302 hp)
rwd
tyres : 225/45 17 front , 245/40 17 rear
suspension font: anti roll bar, coil springs, independant multi link
suspension rear :anti roll bar, coil springs , independant multi link

 
 

[cem_devecioglu]

I need to add , if those tyres survive ( ) till summer  we may have the chance to see their real performance so please dont abuse those expensive tyres

[kevinp58]

I have been watching this thread and wanted to post but then TB locked it so I posted on the other thread "tramlining" I had a thought that all the good tyres that were ok and didn't seem to cause as many problems in tramlining were older tyres and not the new ranges,  Now I am wondering if all new tyre ranges are predominantly made for FWD instead of RWD as nearly all new cars today are FWD if so that may be the reason why thay don't perform well on RWD cars of yester year. 

[05omegav6]

Still doesn't explain why the identical GOODYEAR tyres fitted to both Entwoods 3.2 saloon and SMDs 3.2 saloon perform so differently

[tigers_gonads]

I wonder if its got anything to do with weight distribution of the driver 

[cem_devecioglu]

I wonder if its got anything to do with weight distribution of the driver 

 

[05omegav6]

I also find it strange that a firm such as Continental would insist on selling tyres that were so temperature sensitive in a market with no winter tyre requirement

Surely the compounds would vary according to market requirements. Certainly if I were to sell a product that only worked half of the time, then I would have to price it accordingly, and also sell an equivalent product that worked when the other one didn't,  again at a price which reflected this shortcoming

[cem_devecioglu]

I also find it strange that a firm such as Continental would insist on selling tyres that were so temperature sensitive in a market with no winter tyre requirement

Surely the compounds would vary according to market requirements. Certainly if I were to sell a product that only worked half of the time, then I would have to price it accordingly, and also sell an equivalent product that worked when the other one didn't,  again at a price which reflected this shortcoming

Conti also have another compound for daily normal use.. Ecocontact,premium contact etc etc and its quite different than the sport one..
 
but obviously sport models are designed for more specific range of temperatures..
 
and I must note their winter tyres alway rank 1st or 2nd (without tramlining measures)

[ffcgary1]

I wil go back to my last post on this subject that was not answered,
Have either of these cars been involved in ANY type of accident in there histories, as this will have a bearing on how the car drives. Even if the car is spot on build wise after the repair it will still not be out of the box as they say.
I had a vctra that was hit hard on the front offside and was rebuilt by a major body repair company and looked as good as it did the day it left the factory, but i still to this day say that it was not the same car prior to the bang, it seemed to feel sterile in the steering and was returned to both the body repair co and to vx for checks, nothing was found and then it was replaced under company lease end.
Entwood and SMD will be the guys to answer this as they hopefully will have some history of there cars.
Gary.

[05omegav6]

Can't find it, but remember reading something about SMDs car having been rear ended whilst parked 

This might make it more sensitive to the rear suspension settings, which would affect the thrust angle of the rear axle, which in turn, would affect the geometry of the front end

[Entwood]

I wil go back to my last post on this subject that was not answered,
Have either of these cars been involved in ANY type of accident in there histories, as this will have a bearing on how the car drives. Even if the car is spot on build wise after the repair it will still not be out of the box as they say.
I had a vctra that was hit hard on the front offside and was rebuilt by a major body repair company and looked as good as it did the day it left the factory, but i still to this day say that it was not the same car prior to the bang, it seemed to feel sterile in the steering and was returned to both the body repair co and to vx for checks, nothing was found and then it was replaced under company lease end.
Entwood and SMD will be the guys to answer this as they hopefully will have some history of there cars.
Gary.

Mine has had a very slow speed light knock on the right rear quarter 4 years ago, I was stationary and an idiot who didn't look behind him reversed out of a parking bay !! So I doubt that's done anything to the "layout" of the car. I am not aware of anything else, or I wouldn't have bought the car!!!

[VXL V6]

TB, I thought your MV6 sat lower at the front - nose down? 

[feeutfo]

I wil go back to my last post on this subject that was not answered,
Have either of these cars been involved in ANY type of accident in there histories, as this will have a bearing on how the car drives. Even if the car is spot on build wise after the repair it will still not be out of the box as they say.
I had a vctra that was hit hard on the front offside and was rebuilt by a major body repair company and looked as good as it did the day it left the factory, but i still to this day say that it was not the same car prior to the bang, it seemed to feel sterile in the steering and was returned to both the body repair co and to vx for checks, nothing was found and then it was replaced under company lease end.
Entwood and SMD will be the guys to answer this as they hopefully will have some history of there cars.
Gary.

It has been answered but indirectly Gary. Swapping the wheels between cars sees the fault follow the wheels, infecting that car, where the previously wondering car now behaves. It really is the tyres.

Smd's we need to examine further, looking at the basics first.

[feeutfo]

Can't find it, but remember reading something about SMDs car having been rear ended whilst parked 

This might make it more sensitive to the rear suspension settings, which would affect the thrust angle of the rear axle, which in turn, would affect the geometry of the front end

It was a bumper rub. Nothing more. Plus the issue is at the front, as he can feel it on the steering wheel, I believe.