tyre truing

Kevan · 2nd-Oct-23, 07:46 AM

Greg suggested dabbing isopropyl alcohol on the tyres, I didn't have any handy so used bio ethanol, as it evaporates it didn’t leave a rubber sludge to clean up.

I'm going to try some IPA based hand gel next time.

MrFlippant · 2nd-Oct-23, 04:09 PM

(2nd-Oct-23, 07:46 AM)Kevan Wrote: Greg suggested dabbing isopropyl alcohol on the tyres, I didn't have any handy so used bio ethanol, as it evaporates it didn’t leave a rubber sludge to clean up.

I'm going to try some IPA based hand gel next time.

Anything that evaporates quickly and doesn't melt the rubber should work well. As we all learned in school, it's not the liquid that does the cooling, it's the evaporation of said liquid that does it. That's why rubbing alcohol has such a cold feeling. :)

I can't imagine starting any truing with 600 grit. I wouldn't even bother going that high for a polish... but I'm lazy, so...

Kevan · 2nd-Oct-23, 05:12 PM

I start and finish at 80 grit wet&dry. I've tried rough grit sandpaper but it crumbles away.

For polishing you can't beat lap time on a smooth road surface. In fact I've recently come to the conclusion that if your tyres aren't polishing then the motor is too much for them.

munter · 3rd-Oct-23, 12:10 AM

Some of the balling problem must be caused by the tire rubbing on the same (hot) area of sand paper....this is where the advantage of the counter rotating drum type truers becomes apparent.

Hudy all the way for me, from fifteen years ago until today....not perfect but I have never burnt up tires as seen in the pictures above.

Kevan · 3rd-Oct-23, 06:51 AM

Try truing this 'new improved evo' type rubber, Hudy can gum up and chunk tyres real bad!

munter · 3rd-Oct-23, 06:56 AM

Quote:Hudy can gum up and chunk tyres real bad!

Never had a problem myself….. Maybe you are having operator error?

Kevan · 3rd-Oct-23, 07:35 AM

Maybe you're only using rubber that's easy to true Wavegreen

munter · 3rd-Oct-23, 08:49 AM

I cannot speak for you, Kevan but you ignored my point of the sanding plate being stationary. This must add to the problem.
The sanding plates I have seen also tend to be of finer grit than the standard Hudy drum.
The tires that you complain about are also part of the problem just as much as the techniques and devices used.

Has anyone tried the 500 laps technique?

Anthony B · 3rd-Oct-23, 08:59 AM

(3rd-Oct-23, 06:56 AM)munter Wrote:
Quote:Hudy can gum up and chunk tyres real bad!
Never had a problem myself….. Maybe you are having operator error?

Me neither and I have had my Hudy for 24 years ;)

BAracer · 3rd-Oct-23, 09:08 AM

I think there is a general acceptance in the hobby that you need to avoid overheating the rubber when you true tyres..but how you achieve that is open to interpretation and black magic!