Jump to content




Photo

Inconsistent wheel width


  • Please log in to reply
6 replies to this topic

#1 Samiam

Samiam

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 4,772 posts
  • Joined: 18-January 12
  • Gender:Male
  • Location:Long Island, NY

Posted 12 November 2016 - 08:51 AM

While rebuilding my F1(Grand Prix) car I wanted to calculate the width of the axle tubes. So I measured some different brand rear wheels and came up with quite a variance. Came up with .798" to .818" hub width. Obviously I set my tube width for the widest ones.
 
Do you guys think an industry standard should be set? Sure would make tire testing on race day easier.
Sam Levitch
 
"If you have integrity, nothing else matters, and if you do not have integrity, nothing else matters."
    Robert Mueller, special counsel (2013)
 
"... because people have got to know whether or not their president is a crook."
    Richard M .Nixon, Nov 17, 1973
 
"Fool me once, same on... shame on you. Fool me... you can't get fooled again."
    George W. Bush




#2 tonyp

tonyp

    Grand Champion Poster

  • Member at Peace
  • PipPipPipPipPipPipPipPip
  • 15,325 posts
  • Joined: 12-February 07
  • Gender:Male
  • Location:Sanford, FL, land of lizards and big roaches

Posted 12 November 2016 - 09:11 AM

It would make things easier. But it will never happen.
  • S.O. Watt likes this

Anthony 'Tonyp' Przybylowicz

5/28/50-12/20/21
Requiescat in Pace


#3 Noose

Noose

    Grand Champion Poster

  • IRRA National Director
  • PipPipPipPipPipPipPipPip
  • 23,299 posts
  • Joined: 08-November 06
  • Gender:Male
  • Location:Denville, NJ

Posted 12 November 2016 - 09:31 AM

Sam if you are comparing say a JK wheel to a medium Thunder as an example there is going to be a difference because the the JKs have that little nub/spacer on the inside for a reason. Saves them adding a spacer on a RTR car.

Trim them off and you can flip tires easily and make width.

Joe "Noose" Neumeister
Sometimes known as a serial despoiler of the clear purity of virgin Lexan bodies. Lexan is my canvas!
Noose Custom Painting - Since 1967
Chairman - IRRA® Body Committee - Roving IRRA® Tech Dude - "EVIL BUCKS Painter"
"Team Evil Bucks" Racer - 2016 Caribbean Retro Overall Champion
The only thing bad about Retro is admitting that you remember doing it originally.


#4 MSwiss

MSwiss

    Grand Champion Poster

  • IRRA National Director
  • PipPipPipPipPipPipPipPip
  • 25,909 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 12 November 2016 - 09:33 AM

If it will make you feel any better, Kelly Retros are about .775"-.780".
  • Noose likes this

Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 692 Citadel Drive, Westmont, Illinois 60559


#5 Ramcatlarry

Ramcatlarry

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 2,944 posts
  • Joined: 08-March 06
  • Gender:Male
  • Location:Barrington, IL 60010

Posted 12 November 2016 - 11:35 PM

Most rule sets REQUIRE 0.810" maximum wheel width.  Anything narrow can be spacers added to the tube dimension. Rims wider have to be narrowed anyway - and SHOULD be manufacturer defect/carelessness.


Larry D. Kelley, MA
retired raceway owner... Raceworld/Ramcat Raceways
racing  around Chicago-land

 

Diode/Omni repair specialist
USRA 2023 member # 2322
IRRA,/Sano/R4 veteran, Flat track racer/MFTS

Host 2006 Formula 2000 & ISRA/USA Nats
Great Lakes Slot Car Club (1/32) member
65+ year pin Racing rail/slot cars in America


#6 Brian Cochrane

Brian Cochrane

    Brian Xpro Retro East Member

  • Full Member
  • PipPipPip
  • 195 posts
  • Joined: 05-June 14
  • Gender:Male
  • Location:Long Island, NY

Posted 14 November 2016 - 09:09 PM

Sam,when I change my rear tires to another brand I take one side off at a time and slide the new tire on and check the width so it fits  the max width to the guage, then I tighten it on. Then I take the other side off and slide the new tire on and add or remove spacers as needed to met the max width of the guage. If you take both rear tires off at the same time it takes much longer to get it all correct.So far the tracks we have been racing at on the Retro east series is pretty much Kelly retros on all of them except for Port Jeff.Port Jeff is always Thunder medium. I have found that the rim width is not always consistant even on the same brand at times. Always keep in mind that you need to have just a touch of side play in your axles for maximum speed.Just an added side note,never set your guide flag depth or height until you have the proper size rear tires on the chassis.All set up adjustments should be done in the proper sequence......


  • tonyp, Half Fast and Samiam like this

#7 Samiam

Samiam

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 4,772 posts
  • Joined: 18-January 12
  • Gender:Male
  • Location:Long Island, NY

Posted 15 November 2016 - 07:11 AM

Good advice.

 

Thanks Brian.


Sam Levitch
 
"If you have integrity, nothing else matters, and if you do not have integrity, nothing else matters."
    Robert Mueller, special counsel (2013)
 
"... because people have got to know whether or not their president is a crook."
    Richard M .Nixon, Nov 17, 1973
 
"Fool me once, same on... shame on you. Fool me... you can't get fooled again."
    George W. Bush





Electric Dreams Online Shop