Go Back  R/C Tech Forums > General Forums > Nitro On-Road
Need to true front foam tires for 1/10? >

Need to true front foam tires for 1/10?

Need to true front foam tires for 1/10?

Old 09-27-2005, 08:19 AM
  #1  
Tech Adept
Thread Starter
 
Join Date: Oct 2001
Posts: 169
Default Need to true front foam tires for 1/10?

Is it necessary to true 1/10 touring new front foam tires?

I was advised to true it so asto save my engine. But Cannot really understand why?

Is this true for all 1/10 car or only certain setup? I run a Kyosho V1RRR.
superon is offline  
Old 09-27-2005, 08:31 AM
  #2  
Tech Elite
 
duneland's Avatar
 
Join Date: Sep 2004
Location: NW Indiana, USA
Posts: 2,403
Default

You need to maintain the relative diameter of the tires. If you replace the front tires and keep the worn rear tires, the larger front tires will give a lot of 'overdrive' to the front end. This will affect handling, but have no effect on the engine.
duneland is offline  
Old 09-27-2005, 08:39 AM
  #3  
Tech Adept
Thread Starter
 
Join Date: Oct 2001
Posts: 169
Default

Assuming I used new tires for front and rear. Do I still need to true the front? The original dia is 64.5mm, I was advise to true to 63mm. So the engine does not need to work so hard.
superon is offline  
Old 09-27-2005, 08:52 AM
  #4  
Tech Master
 
Rapid Roy's Avatar
 
Join Date: Oct 2002
Location: L.A. (Rowland Hts)
Posts: 1,531
Default

Thats not the reason to true the tires. If you want a certain gearing, change your gears. Truing the tires gives you less sidewall flex and better handling. So the smaller the better. The downside is that you don't get much use out of a set of foams. You can also miscalculate tire wear and end up running on the plastic rim. Guys with tire sponsors don't care about how many sets of tires they run so they can have optimal handling. If you arn't a-main or nationals level yet, don't bother truing.

You can true a new set of foams to make sure the diameters are the same and you can straighten out a coned set of tires if you have a truer, but you don't really need to start off with smaller foams unless you can take advantage of the increased handling. If your foams are coned, you don't have to sweat it either. The higher end tire truers have the ability pre cut the cone into the tires.
Rapid Roy is offline  
Old 09-27-2005, 10:58 AM
  #5  
Tech Champion
iTrader: (17)
 
Join Date: Sep 2002
Location: Chicago Illinois USA
Posts: 9,291
Trader Rating: 17 (100%+)
Default

I have another reason why need to true a new set of FRONT foam instead of rear foam....(and I do agreed with all of the above reasons)....
Touring car's rear tires will wear FASTER and MORE then the front no matter what shores you are using....after 5 or 10 minutes, you will ended up smaller diameter rear tires, then the front tires, if you did not true the front tires by like 1-1.5mm....

yes, for 30 or even 45 minutes, no matter how you true it, the rear will ended up smaller then the front........but if you true the front tire first, you will have the best roll out of the car from like 10-25 minutes mark.....that is the period you can get the best run of the setup.

Again, this is a must do work for those die-hard racer or team/factory drivers......for local club racing, fun racing....it is NOT a must. But for like $10-11 per pair, I think a lot of ppl don't mind to true off 1-1.5mm on front tires and have a better run of their car...

Correct me if I am wrong...
Solara is offline  
Old 09-27-2005, 02:17 PM
  #6  
Tech Master
iTrader: (2)
 
DS Motorsport's Avatar
 
Join Date: Aug 2005
Location: The Netherlands
Posts: 1,448
Trader Rating: 2 (100%+)
Default

I True my tires every time i drive. Just 1.5 mm in off the front tires.
With a 710 it's a must to true the tires. If they have the same diameter you have overdrive to the front. So you have a lot of understeer.
I use 2 set's of tires on a club race. One set for the quali's and one for the finals. but our club level is very high. All the top driver's of the country drive on our club(Heemstede, Netherlands)
DS Motorsport is offline  
Old 09-27-2005, 03:53 PM
  #7  
Tech Fanatic
 
AndyT ©'s Avatar
 
Join Date: Sep 2004
Location: Sydney Australia
Posts: 862
Default

If youre using the RRR in its stock form, there needs to be a 2mm split in diameters between the front & rear tyres (front smaller than rear) to maintain the stock overdrive ratio.
Theres a data/setup sheet that comes with the kit....inside this you`ll find a front/rear overdrive ratio table which will show what affect the various tyre diameters have on overdrive.
Cheers
AndyT © is offline  
Old 09-28-2005, 10:57 AM
  #8  
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 363
Default

how much difference would it make if one would to run on brand new tires compared to trued tires?

would it make a big difference?

this thread has made me contemplate on getting a tyre truer in the near future.
dct147 is offline  
Old 09-28-2005, 12:22 PM
  #9  
Tech Champion
iTrader: (17)
 
Join Date: Sep 2002
Location: Chicago Illinois USA
Posts: 9,291
Trader Rating: 17 (100%+)
Default

Originally Posted by dct147
how much difference would it make if one would to run on brand new tires compared to trued tires?

would it make a big difference?

this thread has made me contemplate on getting a tyre truer in the near future.
Tire truer is no longer a expensive item....a decent one is around $250US that doesn everything automatically, however, the truer is like TOOLS, like AMB PT, one day you decided to quit or upgrade, their resale value are still very high.........

Of course, I am not talking about selling the truer 20 years later...
Solara is offline  
Old 09-28-2005, 12:34 PM
  #10  
Tech Elite
 
Sow&Steady's Avatar
 
Join Date: Dec 2003
Location: Va Va Voom!
Posts: 4,104
Default

Originally Posted by DS Motorsport
I True my tires every time i drive. Just 1.5 mm in off the front tires.
With a 710 it's a must to true the tires. If they have the same diameter you have overdrive to the front. So you have a lot of understeer.
I use 2 set's of tires on a club race. One set for the quali's and one for the finals. but our club level is very high. All the top driver's of the country drive on our club(Heemstede, Netherlands)
This is the REAL reason why you need to true the difference in diameter no matter what car. All "racer" cars, 710, MTX, RRR etc have a slight amount of overdrive however I do agree with everyone that it is not mandatory or compulsory to do.

As for Heemstede, one of the "top drivers" would be Julius.
Sow&Steady is offline  
Old 09-29-2005, 11:18 AM
  #11  
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 363
Default

thanks for the reply.

but, how much difference does it make if i were not to true my tyres?

i`ve never driven on trued tires before.
dct147 is offline  
Old 09-29-2005, 11:47 AM
  #12  
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default

Originally Posted by AndyT ©
If youre using the RRR in its stock form, there needs to be a 2mm split in diameters between the front & rear tyres (front smaller than rear) to maintain the stock overdrive ratio.
Theres a data/setup sheet that comes with the kit....inside this you`ll find a front/rear overdrive ratio table which will show what affect the various tyre diameters have on overdrive.
Cheers
Any info for Mugen MTX3 ? I'm using original box setup, no mod. I don't have tire truer so I have to use the tires as is.

My second question, is it possible to change the pulley teeth so I don't have to true the front tires and get no ill handling effect after 20-25 minutes race (rear tire wear faster issue) ?

Once I lost the rear belt, the car was doing low top speed. As soon as I replaced the rear belt, the car was running back to normal again. Is this mean the car is doing 2WD at mid to top speed, and 4WD at very low speed ? 4WD for few seconds under acceleration ?

Last edited by asw7576; 09-29-2005 at 12:04 PM.
asw7576 is offline  
Old 09-29-2005, 12:01 PM
  #13  
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default

Originally Posted by dct147
thanks for the reply.

but, how much difference does it make if i were not to true my tyres?

i`ve never driven on trued tires before.

Front tires shaved: You feel the car is doing great ( feel good setup ) even after 20-25 minutes.

Front tires are not shaved : You feel the car is good for the first 10-15 minutes, after that the car feel like lousy setup.

I ask my friend to shave front tires during big race sometimes.
asw7576 is offline  
Old 09-29-2005, 12:26 PM
  #14  
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 363
Default

Front tires shaved: You feel the car is doing great ( feel good setup ) even after 20-25 minutes.
thanks.

i understand it better now.
dct147 is offline  
Old 09-29-2005, 01:42 PM
  #15  
Tech Master
 
ziggy12345's Avatar
 
Join Date: Jun 2003
Location: West Midlands, UK
Posts: 1,596
Default

If you have the RRR you will find the optimum handleing when the rears are 62mm and the fronts 60mm. I true mine down to this from new for an important race.
ziggy12345 is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.