J4CKO

iTrader: (1)

Always amazes me the relative grip of different surfaces, from shiny smooth zero grip to sandpaper like stuff that you cant unstick your car on whatever you do, down the Chester road there is one bit that in the rain, coming off the roundabout if I accelerate the front inside wheel will spin in third up to 70 mph, not through massive power, just a really crap surface, yet there is another one where you would have to be brutal to do the same in first from a standstill.

The grippy stuff seems to be in stratgic places and I am convinced it makes a huge difference so how come they dont use the grippy stuff more or all the time, is it expensive, too abrasive or too noisy ?

Chip Sengravy

It's called 'Shellgrip' , and it costs a bomb.

Jamo

iTrader: (23)

the slippy stuff is called masterpave, its really cheap as the material is very hard and can be laid very thin, you can always tell if its that stuff as its very shiny and theres usually lots of crashes on it.

the shellgrip stuff is seriously expensive, hence you dont see much of it.

james

AudiLover

is shellgrip the yellow stuff?

Chip Sengravy

Beige, usually.

NotoriousREV

or red

AudiLover

ok now I get ya. Whats the yellow stuff called then?

greenonedave

shellgrip would **** your tyres very quickly if used all over,

Rusky

The normal black asphalt can be made from lots of different types of stone,limestone,granite and gritstone,limestone being cheap is not as skid resistant as the granite which in turn is less skid resistant than the expensive gritstone.Its all to do with polished stone values "psv" (how long it takes the stone to polish)and depends what the contractor or council decides to use on a perticular bit of road.The thin yellow and red stuff is just a topping to help improve skid resistance in blackspots or near junctions

Leslie

Brand new tarmac can have a film of oil for a while too. We bikers soon learn about things like that!

Les

Rusky

The road will be very slippery until the bitumen has been worn off of the surface,so the road is not at its best until after a few months of traffic passing over it.

Shark Man

Ahh that cheap shiny stuff, nice a smooth, great in the dry.

Come a bit of Rain + Monaro = sideways action in 1st,2nd, 3rd and 4th gears


Although didn't bank on it happening when overtaking Mrs Moggings pottering along in her motorised shopping trolley....first time I've overtaken a car whilst travelling sideways (traction control = ON, btw )

GaryCat

I did a Honda trackday at Prodrive last week and besides thrashing S2000s all morning, we had a go on a low-friction skid pan which is 3 times more slippery than black ice.

You could drive at more than 8 mph on it without sliding off