12 replies to this topic

[W. J. Dougherty]

Does anyone have an idea of just how much rubber has to be left on the hub for the tires to still work on the car? 

 

Most times the chassis will drag before the rubber is down to the rim.  But the question is "how low can you go?"

 

Thanks...

[spudboy]

WJ...

 

The rules often state "how low you can go" with miinimum chassis clearance requirements. You certainly don't want to damage the track.

 

As for how "how much rubber has to be left on the hub for the tires to still work on the car?". That's why we have to test. Too many variables to make a blanket statement.

[Frank The Tank]

Enough to avoid pregnancy.

[W. J. Dougherty]

Assuming the chassis didn't drag, has anyone ever run the tires down to the hub?  At what thickness did the tires quit working?

[gotboostedvr6]

assuming proper glue conditions the thinner the rubber the faster the car but also the more unforgivable it is.

[gotboostedvr6]

I ran jk big boys one time at 700. The car ran great on the center lanes but on the outside it was very difficult to control.

[zipper]

The rubber breaks/rips easily when thin enough - 3/64 begins to be pretty fragile.

[Tim Neja]

My only question--WHY???  Testing and tuning will be the only way you'll find what works on your track / glue conditions.

[W. J. Dougherty]

With the move to ever increasing hub diameters, I wanted to know people's experiences in dealing with extremely thin rubber layers on hubs and how the car reacted to it?

 

Its called research or collecting data from others.  I usually do this before I conduct any testing on my own.  It also gives me the opportunity to determine if testing is even warranted.  Why waste tires when you might not have too...

[zipper]

With big hub wheels I get chipped rubber in about every G7 race.

[MSwiss]

I think big hub rims is the toughest thing to give advice about.

It's so dependent on car type,track type,traction level and lane you're on, I'm not sure any advice is of much value.

[jimht]

Bigger hubs cost more, thinner rubber gets less traction, smaller hubs cost less, thicker rubber gets more traction, rubber gets more traction than aluminum or magnesium, so the best thing to do is to start with a bare hub and keep adding rubber until the traction is just right   YMMV if glue is used to either make the track sticky or hold the rubber on the rim, then more traction might be attained with a heavier or a lighter hub.

[Tex]

I've run some pretty scanty JK Big Boys. Glue doesn't help aluminum much. As mentioned, the edges start to chunk when the rubber gets pretty thin.