High speed friction drive wheels...?

so I decided to start on a beetle full body spinner using what I have laying around, that beying a few castle creations car motors of various kv from 3800 to 6900

I chose the 3800 motor for torque and after testing the banebots 30d wheels at 40k rpm I now have a new problem besides the giant motor.

at about 10k the wheel grows to about 2" from the original 1-3/8"

past 30k watching a bonded wheel seperate from the rim and bounce off every wall in my room gave my cat something to chase but no working mechanism for me, figures

Soooo does anyone have any wheel suggestions for a suitable 30-40k rpm rubber wheel or is this just not a good idea, also under full load of the shell I don't see the wheel going past 25k.

I have tested other durometers also and have found skateboard wheels tend to chip and explode past 15k rpm and they were from 45a to 60d

try a colson if you can

COLSONS!!!!! of the same diameter are running fine in our 15lb FBS

how far do you think I could shave the wheel before i hit the hard plastic hub?

Senai might be a good one to answer that, from what I remember he ran them down pretty far

Look up McKee Stewart and call them.

The guy down there is the local colson dealer and knows a good bit about casters and durometers and all the information involved with them.

He should be able to help answer any questions.

Ask for the guy that takes care of the colson wheels there.... I forget his name but I always ask them that and they put me straight through to him.

Tell him you are doing battle bots and need some info. He will take care of you.

FRISCO

Cody wrote:

Senai might be a good one to answer that, from what I remember he ran them down pretty far

1) DAM U CODY!
2) I'll go to school and measure the dia. Can't remember off the top of my head.

Colsons are AMAZING!!!!! thanks for the suggestion I shaved them quite small but i still dont think they

will work too big still bahhh

Has anyone ever tried thick o-rings streched over a pulley for high speed use?

http://www.mcmaster.com/#rubber/=b92etj

rubber comes in tubes of varying densities

Evan Steeves wrote:

Has anyone ever tried thick o-rings streched over a pulley for high speed use?

BAD IDEA! DON'T DO IT! I can tell you from experience it won't work. No matter how tight you get the o-rings, after about 5K they will start to deform and will come flying off your hub. Stick with wheels, they're much more reliable.

SenaiERI wrote:

Evan Steeves wrote:

Has anyone ever tried thick o-rings streched over a pulley for high speed use?

BAD IDEA! DON'T DO IT! I can tell you from experience it won't work. No matter how tight you get the o-rings, after about 5K they will start to deform and will come flying off your hub. Stick with wheels, they're much more reliable.

I second this! They Blow up. Literally.