And if so why bother with the pain
of tyre changing when can put my feet up and watch the pro do it for nothing (or to collect specific parts ordered through dealer).
One possible cause could be the rolling diameter
of the tyres change according to the pressure set and ambient pressure and temperature.
Not exact matches
«Difficult to say because
of the new tarmac, it really
changes the whole car, the whole way
of driving, also with the new
tyres.
A Porsche mechanic made
changing tyres look effortlessly simple during the 6 Hours
of Silverstone
They pitted at the end
of lap one to
change tyres but Wehrlein's car was released right into the path
of Button's McLaren, giving the Sauber driver a five - second time penalty.
The online reveal showed off the result
of these big new regulation
changes for the up - coming season, mainly focused on aero and
tyres.
But now, the only limit to the speed
of pit stops is the speed at which humans can
change the
tyres.
There had been some drastic regulation
changes, namely much tighter aerodynamic specifications and the introduction
of grooved
tyres and it was clear early on that Newey had interpreted these
changes more efficiently than others.
In DTM, this effect
of longer stops was then exaggerated by another rule
change - the banning
of tyre warmers.
One handed
tyre change by @porsche mechanic, you don't see this kind
of pit stop somewhere else!
Why some
of the pitstop clips feature going from dry to wet
tyres (in sunny conditions) and why so many
of them require nose
changes, but there we go.
Drivers have to keep the pace up and manage
tyre wear and fuel use across a race whilst also needing to adapt to potential strategy
changes (
of which there are many in IndyCar, thanks to the number
of caution periods).
At present there is no legislation on the age limit
of any
tyres fitted to vehicles in the UK, so Frances has enlisted the help
of Maria Eagle MP and they have met with Patrick McLoughlin, The Secretary
of State for Transport to try to
change the law on this important matter.
The man had injured the skin
of his hands
changing car
tyres in cold weather and «should have been wearing plastic gloves,» says Heidelore Hoffman, the dermatologist who reported the case, «but he thought he was protected because he had been vaccinated against smallpox as a child.»
Speedo error calculator calculates speedometer error as a result
of the
change in
tyre size.
Then to make things even more real, add in all sorts
of weather and this makes the track even more varied to race, so you need to
change your strategy and
of course your
tyres.
It's fairly close to production spec, too, with the inevitable loss
of interior trim and seats, some toughened suspension and the fitment
of slick
tyres and necessary safety equipment the only major
changes.
The strength
of the Michelin
tyre ensured that drivers could focus on racing rather than management, and the results were lots
of late braking manoeuvres, lunges into hairpins and high - speed place
changes.
The only other hardware
change made to the M4 CS is the fitment
of 265 / 35x19s front and 285 / 30x20s rear Michelin Pilot Sport Cup 2
tyres on lightweight forged wheels.
the front wheel's damage has not
changed the shape
of the part that is in responsible
of the sealing
of the tubeless
tyre, so no
change needed for the moment!
Did some research, removed incorrect information, i still think its an unfair comparison with rolling resistance
changing as well in terms
of total contact patch (your article has a 40 mm difference between the largest and smallest set
of tyres).
Having said that, when, at around 25,000 miles, we
changed from the original ContiSportContact 2
tyres to a set
of Michelin Pilot Exaltos, the Astra's near - the - limit feedback improved notably (in the dry, at least), making it far more relaxing to hustle along.
Since there is less to press the rear
tyres to the road, they will slide more easily, but this is not the same thing as saying a lighter car would therefore slide more easily at both ends... The point is that the balance
of the car has
changed and it is the
change that makes the difference in the car's behaviour.
Applying the same thinking to the road, the
change in surface conditions has a massive bearing on the performance
of a vehicle and the only connection we have is the contact patches
of tyres.
While there could always be more information, the subtle
changes in resistance through the rim — combined with utter precision and near - perfect weighting — make feeling for the limits
of the
tyres (Pirelli P Zeros were fitted to our test car) as satisfying as it is necessary when the roads are greasy.
By now Porsche Motorsport had been given a little more freedom and the result was a car with the expected boost in terms
of performance but also a number
of detail
changes: GT3 - specific brakes and wheels, wider
tyres, an oil cooler and stronger synchros for the gearbox, and more aggressive suspension settings with unique carriers and split rear wishbones for increased camber control.
As expected though, under acceleration with most
of the weight on the rear
tyres, the steering
changes again and feels very vague and unpredictable.
«The road markings, patches
of repaired asphalt, surface
changes and drain covers really called for a
tyre that was not only competitive but also strong.
Bigger front brakes with four - pot callipers, quicker steering and 10 mm wider
tyres complete the standard hardware
changes, while a lower front splitter and bigger rear diffuser together with a new design
of alloy wheel complete the styling tweaks.
I was really intrigued to see how the dynamics
of the car would
change with a different style
of tyre.
There are
changes inside too, including a set
of bewinged Gazoo Racing - branded adjustable bucket seats, a small - diameter steering wheel snatched straight from the GT86 sports car (a car, incidentally, now looking slightly under - powered and under -
tyred against the Yaris GRMN) and the obligatory aluminium - faced pedals and aluminium gearknob.
To understand why developing race
tyres for the 2014 edition
of Le Mans has been such an exciting and involving challenge for Michelin, you first need a brief overview
of what technical
changes have been instigated by the race organiser, the Automobile Club de l'Ouest.
The 1M's short wheelbase and lack
of roll mean that it can feel quite a snappy car over the limit, but with the throttle set to Sport (the one and only setting you can
change) you have the perfect tool to keep the rear wheels spinning just as much as you want - once sideways it seems to stabilise sweetly, albeit with a lot
of tread being shed from the
tyres.
And we can report that with all electronic safety nets switched off, the Lusso T is eminently driftable on snow on its snow
tyres, comfortably poised on opposite lock, with plenty
of power on tap to
change the angle.
With 577bhp, 516 lb ft
of torque, Cup 2
tyres, coil over suspension and a host
of aero
changes, it certainly has the hardware.
Over The Last Fourteen Plus Years Our X50 Package 996 Has Only Covered Just 34399 Miles, Which Over These Years Roughly Works Out At About 2500 Miles Per Annum, However Regardless
Of This Sensational Mileage Reading It Has Had The Following Maintenance Visits Logged At 2520, 4739, 10730, 16000, 24833, 29903, 32724 & 34389 Miles, With The Very Last Being A Full Major Service, With Spark Plug Renewal, Brake Fluid
Changes And A Full Brand New Set On Branded Pirelli P Zero
Tyres, All Completed In The January
Of 2018 By A Main Dealer Porsche Centre.
The company has also equipped all the variants
of this iconic petrol sedan with a full size spare wheel, which have been fitted in the boot compartment along with a jack and other tools that help in
changing the
tyre.
Even after a wheel
change with the system being required to register and «learn» the new electronic data within the
tyre, no more than three minutes will elapse until the driver is in formed
of the new readings.
A
Tyre Pressure Monitoring System ensures constant monitoring
of tyre pressure and alerts the driver if pressure levels have
changed.
The hot weather and wildly
changing road conditions may have had a role to play in the lower than expected performance
of the
tyres.
Dimensions Length without rear wing: 4,980 mm Width without mirrors: 2,046 mm Width with mirrors: 2,224 mm Height: 1,212 mm (variable) Wheelbase: 2,880 mm Engine Model: V8 engine with BMW TwinPower Turbo Technology Capacity: 3,981 cc Number
of cylinders: 8 V angle: 90 ° Bore: 89 mm Stroke: 80 mm Cylinder spacing: 98 mm Engine speed: approx. 7,000 rpm Body • Composite body with carbon core and DMSB - approved safety roll cage • CFRP outer shell with quick -
change concept Chassis • Double wishbones on front and rear axle • Four - way adjustable shock absorbers at front and rear • Anti-roll bars with quick adjustment Power Transmission • Six - speed sequential motorsport gearbox • Electric paddle shift system • Limited slip differential • CFRP drive shaft • Sachs carbon - fibre clutch Electronics • BMW Motorsport in - house developed software functions for engine, gearbox and driver assistance • Steering wheel with 16 buttons and seven dials • Rear - view camera system with object recognition • High - performance headlights with OSRAM LED elements • Live telemetry system for vehicle monitoring Wheels /
Tyres • BMW Aero rims: 12.5 x18 inch on the front axle, 13x18 inch on the rear axle • Michelin tyres: 30/68 R18 on the front axle, 31/71 R18 on the rear
Tyres • BMW Aero rims: 12.5 x18 inch on the front axle, 13x18 inch on the rear axle • Michelin
tyres: 30/68 R18 on the front axle, 31/71 R18 on the rear
tyres: 30/68 R18 on the front axle, 31/71 R18 on the rear axle
The driving modes
change the whole feel
of the car, with Michelin cross-climate
tyres a good match to the alfa it had no issues getting to work in the snow
of 2018.
Taking on fuel and
changing tyres will take around 25 seconds and switching the drivers will take at least that amount
of time, so the way Tommy (Milner) and I swap is going to be crucial.
Improvements include a larger diffuser for more efficient aero, double wishbone front suspension adopted from the RSR, a shim system allowing setup
changes without new alignment, larger front
tyres, an electro - hydraulically actuated clutch allowing the removal
of the clutch pedal, a fuel cell that can be configured to be refilled from left or right
of the vehicle depending on circuit layout, a rear - view camera and collision avoidance system, a fixed seat with movable pedal - box and energy - absorbing impact elements placed in the doors for improved safety as well as air conditioning.
We have given the car a major service (with spark plugs), fitted two new Continental
tyres,
changed the brake fluid, fitted a new water pump, refurbished the alternator, replaced the coolant pipes, replaced the main drive belt, regased the air - conditioning system, aligned the wheels, plus undertaken a myriad
of minor jobs.
Afterwards when then RS 7 goes on the hoist for that
tyre change we discover the retaining bolts have fallen out
of a couple
of rear suspension reinforcing braces.
A second nudge on the right - front corrected Gavin's course and the British ace, now seventh, was able to settle into the rhythm
of the race without any debilitating wounds to speak
of, when an completely unrelated left - front puncture necessitated an unscheduled
tyre change, dashing all hopes
of a podium result for the # 4 Corvette Racing crew.
Other
changes include torque vectoring for each
of the rear wheels, shorter gearing, recalibrated control software, all - new titanium exhaust with 7 kg weight saving and retuned acoustics, forged 21 - inch alloy wheels in gloss black, Pirelli
tyres, sport - focused Electronic Stability Control programme, Carbon Silicon Carbide (CSiC) braking system (420 mm front and 356 mm rear brake discs, 8 - piston front calipers in green), two - seat cabin with carbon fibre, Alcantara and leather interior upholstery; bespoke sport seats with additional side support through deeper bolsters upholstered in Beluga black leather and diamond - quilted Alcantara, upholstered steering wheel and gear shifter, centre console and fascia panels in carbon fibre, carbon fibre door casings with diamond - quilted Alcantara inner panels, rear cabin with a carbon fibre surround and upholstered in leather and Alcantara, green hide colour on the seats, instrument panel, door panels, contrast stitching throughout the seats and diamond - quilted areas; GT3 - R badging on the centre console, passenger - side fascia panel, sill treadplates; GT3 - R stitching at seat headrests in with contrast - green stitching, carbon fibre fixed rear wing and boot lid, bonnet with two vents, Glacier White body colour with gloss carbon fibre contrasts, two - tone green graphics tracing two power lines to the side profile
of the car (one leading backwards from the front wheel, the other tracing the shape
of the Continental GT's rear haunch), headlamp bezels, matrix grille, window surrounds and bumper strips in gloss black.
The Vento continues to have a good balance
of ride and handling with grip levels being better than before thanks to the
change in
tyres to Apollo Alnacs.
The wheel lifting is more sudden than that
of other cars, because it is caused by coming to the end
of the suspension travel while there is still load on the
tyre, so the load on the other (outside) rear wheel is a discontinuous function
of cornering load, rather than just
changing slope.