Siping tires for wet weather? Worth the effort?

[mudgudgeon]

I would not say the tires are hydroplaning, just losing traction mostly when braking on a semi slick bitumen surface.

Seems like a bit of a 50/50 wether siping will help.

Might be time to bite the bullet and get new rubber.

Was also thinking my front to rear brake balance may not be right. Could be a bad LSPV contributing to locking fronts when traction is marginal.

 

[pnwcruiser]

No need to sipe for wet, siping is better for ice as it grips the ice better (bites the ice). For wet you want a tire with good tread, designed for allowing water to evacuate (not hydroplane on water but put more rubber to the ground). Really the design of tires will determine how well they work for not hydroplaning. If you run Nitto Terra grapplers, you just need to make sure you have adequate tread depth and run a good tire pressure for pavement use. When off-road, you won't need to worry about hydroplaning most likely. I live in Seattle, WA USA, we know a thing or two about driving on wet roads. I'm running Goodyear Wrangler DuraTrac on both my FZJ80 and '05 4Runner (120 Prado). The FZJ80 had E load so they require more than normal pressure, I am playing with that now but seem to get a decent wet road traction at 40-42 psi. Our 4Runner we run at 35 psi since they are C load tires. What are your Nitto rated and how much over stock weight are you running in your 80?

 

[baldilocks]

No need to sipe for wet, siping is better for ice as it grips the ice better (bites the ice). For wet you want a tire with good tread, designed for allowing water to evacuate (not hydroplane on water but put more rubber to the ground). Really the design of tires will determine how well they work for not hydroplaning. If you run Nitto Terra grapplers, you just need to make sure you have adequate tread depth and run a good tire pressure for pavement use. When off-road, you won't need to worry about hydroplaning most likely. I live in Seattle, WA USA, we know a thing or two about driving on wet roads. I'm running Goodyear Wrangler DuraTrac on both my FZJ80 and '05 4Runner (120 Prado). The FZJ80 had E load so they require more than normal pressure, I am playing with that now but seem to get a decent wet road traction at 40-42 psi. Our 4Runner we run at 35 psi since they are C load tires. What are your Nitto rated and how much over stock weight are you running in your 80?

In fact, siping was invented by Mr. Sipe who wanted to make his own shoes grip his wet sail boat deck better hence the Dockers shoe.

If siping helps on ice, why would it not help on wet, paved roads?

 

[pnwcruiser]

In fact, siping was invented by Mr. Sipe who wanted to make his own shoes grip his wet sail boat deck better hence the Dockers shoe.

If siping helps on ice, why would it not help on wet, paved roads?

I think you meant slaughter house. Docker shoes are not by Sipe. Tread design for evacuation of water at high speeds along with tire compound, will do well. Factory sipes are designed to provide a balance of tire longevity and performance. If you want to have optimal wet traction, all-terrain tires do okay but won't hold against tires designated for wet pavement use. Another reason to not sipe afterwards is chunking when taken off-road. Tire pressure, start there.

 

[baldilocks]

I think you meant slaughter house. Docker shoes are not by Sipe. Tread design for evacuation of water at high speeds along with tire compound, will do well. Factory sipes are designed to provide a balance of tire longevity and performance. If you want to have optimal wet traction, all-terrain tires do okay but won't hold against tires designated for wet pavement use. Another reason to not sipe afterwards is chunking when taken off-road. Tire pressure, start there.

No, I mean Mr. Sipe, the guy who invented siping for shoes to perform better on boat decks.

 

[mudgudgeon]

Tires are E rated.
I am not generally carrying any additional weight over stock, except fuel load with sub is an additional 50kg in the rear.
I generally run 32-35psi on road. Might take a look at that.
This still have approx 7/16 tread depth

 

[pnwcruiser]

Tires are E rated.
I am not generally carrying any additional weight over stock, except fuel load with sub is an additional 50kg in the rear.
I generally run 32-35psi on road. Might take a look at that.
This still have approx 7/16 tread depth

Definitely give higher pressure a try, it's free and won't be permanent.