Jump to content




Photo

JK Retro size, small and medium hub, premium rubber tires


  • Please log in to reply
30 replies to this topic

#1 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 05 September 2017 - 03:25 PM

Now available
 
Oversize .820" x 3/32" axle.
 
These tires are actually .830" - .835" OD, but you'll probably see in my photo, at that dia. they are just short of "cleaning up", 100%.
 
T9S3N* - premium rubber version of small .400" hub / 8703PP
 
T9M3N* - premium rubber version of medium .470" hub / 8713PP (hub formally known as Prince large)
 
$13.29 pair
 
This is the premium, dense rubber, that racers seem to be so excited about in this thread;
 
http://slotblog.net/...ber#entry691672
 
It definitely has a different appearance, has a firmer spongy feel, and as one would expect, it's heavier.
 
A premium small pr. of tires, weighs 5.5G a pair, compared to it's non-premium counterpart, 8703PP, which weigh in at 4.7G per pair.

I don't have any personal experience with this rubber, but I would guess, but not stake my life, that it's appication would be the same as it's similar stock #.

IOW, for Flat tracks and situations, where you are looking for maximum bite.
 
20170905_143325-1.jpg
 
20170905_155549-1.jpg
This flash photo shows the tighter pore structure, of the premium rubber, on the right.

20170905_161146-1.jpg
The very minor, "not 100% cleaned up" issue, mentioned in the above text. You can see sort of a smiley face at 3 o'clock. IIRC, it is mostly with the medium hub tire.

Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.





#2 Matt Sheldon

Matt Sheldon

    Duffy HMI Executive

  • Full Member
  • PipPipPipPipPipPip
  • 1,661 posts
  • Joined: 19-January 10
  • Gender:Male
  • Location:Platteville, CO

Posted 05 September 2017 - 04:18 PM

Mike,

 

Add 5 of each to my order


Matt Sheldon

 

 

 

 

 

 

 

 


#3 JK Products

JK Products

    Mid-Pack Racer

  • Subscriber
  • PipPipPip
  • 128 posts
  • Joined: 12-December 15
  • Gender:Male
  • Location:Algonquin, IL

Posted 05 September 2017 - 05:29 PM

Just to be clear, we were aware of the "clean up" issue on the medium rim tires (the small rim tires are fine) and contacted Mike before shipping. We explained we would be able to clean them up perfectly but that would leave us close to the 0.820 specification, not the normal +0.010" - 0.020" over size we normally target. He suggested we leave them as is and so we did. Without track testing we can't tell if it will have a performance impact or if it is just cosmetic, it's that close. 

 

I don't want people to think we weren't aware of shipping less than 100% quality tires and our customer discovered the issue. (OK, it has happened before ... but not this time. lol). 

 

This is another example of the improved communication between JK and the raceways we are striving for. 


  • Steve Deiters, Samiam, Rich Goucher and 1 other like this
Tim Homola
JK Products

#4 usadar

usadar

    Checkered Flag in Hand

  • Subscriber
  • PipPipPipPipPipPip
  • 1,112 posts
  • Joined: 12-January 10
  • Gender:Male
  • Location:Tokyo; Japan

Posted 05 September 2017 - 05:59 PM

Is this rubber good for racing retro on Gerding Kings?
Haruki Kan
Retro Tokyo
Retro Tokyo
Retro Tokyo on Facebook
 
Where do we go from here: chaos or community?

#5 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 05 September 2017 - 05:59 PM

Yes, in my quest to get all the rest of the info posted, I omitted to mention I OK'ed them to be shipped, not 100% cleaned up.

Now seeing them in person, it's really a trivial detail.
  • JK Products likes this

Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#6 Tim Wilkins

Tim Wilkins

  • Subscriber
  • PipPipPipPipPip
  • 882 posts
  • Joined: 22-February 13
  • Gender:Male
  • Location:Northridge, CA

Posted 05 September 2017 - 06:21 PM

Is this rubber good for racing retro on Gerding Kings?

 

My guess would be NO as compared to say something like the Alpha medium wonder rubber or even JK Products wonder rubber tires.  I have a couple pair arriving in the mail this week and will have one of the local legends  :laugh2: at BPR do some track testing on both the flat and king tracks this coming Saturday.  I'm hoping these tires prove to be a winner on BPR's flat track.


"If everything seems under control, you're not going fast enough" - Mario Andretti


#7 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 05 September 2017 - 06:36 PM

Is this rubber good for racing retro on Gerding Kings?

My opinion, without any practical experience, would probably match Tim's.

Sorry, I didn't post in quite the detail I would have liked to, but at some point, I had to stop this thread, and get to the post office, to get some of these shipped out to customers.

Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#8 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 08 September 2017 - 02:22 PM

I got more of these in today.

 

I shipped these out to 3 racers that are racing on a very competitive, Retro flat track race, this weekend.

 

Hopefully they will all get them on time.

 

20170908_141306-1.jpg

 

It will be interesting to see if they are a dream......or a dud. LOL

 


Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#9 Jim Lange

Jim Lange

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 222 posts
  • Joined: 08-February 09
  • Gender:Male
  • Location:Simi Valley

Posted 09 September 2017 - 01:22 PM

Any chance this rubber will also be available on Big Daddy hubs?



#10 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 09 September 2017 - 01:42 PM

I'll have to ask.

 

The PO really dropped the ball this week.

 

Only one of my 3 orders, of these, going out to SoCal, got there on time.


Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#11 JK Products

JK Products

    Mid-Pack Racer

  • Subscriber
  • PipPipPip
  • 128 posts
  • Joined: 12-December 15
  • Gender:Male
  • Location:Algonquin, IL

Posted 09 September 2017 - 01:52 PM

Hi Jim,

 

Probably not. The rubber is so limited that I will leave it for the smaller hubs.

 

Tim


Tim Homola
JK Products

#12 Tom Eatherly

Tom Eatherly

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,688 posts
  • Joined: 28-October 11
  • Gender:Male
  • Location:SoCal

Posted 09 September 2017 - 04:41 PM

I believe Jason Holmes used the "Premium Medium (T9M3N) and won our flat track F1 race. There were a number of guys running, testing, and whatnot. These look promising for the flat track at BPR.


  • MSwiss, tonyp and Eddie Fleming like this
Tom Eatherly

#13 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 09 September 2017 - 05:36 PM

I got a text from Jason.

 

He said he did not want to cut-down a pair for F1, and won with Alphas.

 

He did confirm, in testing, that they were .05 faster than Alphas on his Can-Am, and that they were bitier than regular JK PP rubber.


  • Tom Eatherly likes this

Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#14 Tom Eatherly

Tom Eatherly

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,688 posts
  • Joined: 28-October 11
  • Gender:Male
  • Location:SoCal

Posted 09 September 2017 - 06:10 PM

OK, Mike, thanks for that. I know he was fooling around with them when we were practicing.

 

The Alphas are a heck of a tire for BPR's flat track but, those new JKs sure do look good.


  • MSwiss and JK Products like this
Tom Eatherly

#15 JK Products

JK Products

    Mid-Pack Racer

  • Subscriber
  • PipPipPip
  • 128 posts
  • Joined: 12-December 15
  • Gender:Male
  • Location:Algonquin, IL

Posted 10 September 2017 - 09:33 AM

The ISRA guys really like the new rubber on their flat tracks. Really like. 


Tim Homola
JK Products

#16 Jason Holmes

Jason Holmes

    Race Leader

  • Subscriber
  • PipPipPipPipPip
  • 607 posts
  • Joined: 07-March 08
  • Gender:Male
  • Location:Harbor CIty, CA

Posted 10 September 2017 - 03:15 PM

Haruki

 

These tire would have way to much bite for a Gerding King Track.  Much better for flat track racing.  Awesome tire I think for that purpose.

 

jason



#17 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 18 September 2017 - 07:24 PM

I put a pair of the small hub ones on a F1 car I lent out yesterday in our monthly fun race/Sano-warmup.

 

The driver, Eldon Wright, in his first Retro F1 race, and his 3rd or 4th Retro race, ever, came in 4th.

 

I was impressed enough, that with the King track not nearly at the traction level we see at Sano, I went ahead and put the same pair on my CanAm car and raced them.

 

They performed as I expected.

 

I never drove off of the track on my own, and I was a bit off the pace, compared to the fast guys on Wonder rubber, Howie and Ricky D.

 

I still finished 3rd, a lap out of 2nd and two laps out of 1st.

 

Posts #6 and 8 at;

 

http://slotblog.net/...ay/#entry693829

 

I was impressed with the wear, for a high traction tire.

 

After two 16 minute races, the tires, which started at approx. 830", were at approx. 808" and .815".


  • tonyp, Jason Holmes and Eddie Fleming like this

Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#18 Eddie Fleming

Eddie Fleming

    Race Leader

  • Full Member
  • PipPipPipPipPip
  • 781 posts
  • Joined: 27-April 14
  • Gender:Male
  • Location:Fayetteville, GA

Posted 19 September 2017 - 06:37 AM

Saturday I ran the JK premium tires in Two races on the hill climb at CMS in Atlanta. Finished second in both Stock and F1. Chris Barns won both races using the JK Premium rubber he mounted on rims I think.

 

They run great and The set I ran should be good for another race.  


  • MSwiss likes this
Eddie Fleming

#19 kvanpelt

kvanpelt

    Race Leader

  • Subscriber
  • PipPipPipPipPip
  • 970 posts
  • Joined: 29-January 08
  • Gender:Male
  • Location:IL

Posted 19 September 2017 - 10:10 AM

Mike, did the increased traction build more heat into the motor?


Kevin VanPelt
 
 

 

 


#20 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 19 September 2017 - 11:23 AM

I would say no.

I ran my fast time of the race, the 7th heat, on Purple.

But the car really never felt over-tired.

The only time the car seemed tight, was the last 30 seconds, or so, in the lead-on, on Black, when I backed off knowing I wasn't going to catch Howie or Ricky.

Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#21 Howie Ursaner

Howie Ursaner

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,293 posts
  • Joined: 01-March 07
  • Gender:Male

Posted 19 September 2017 - 11:42 AM

I won the F1 race on the JK Premium small hub !! Track conditons were difficult , these tires were the answer.


  • JK Products likes this
Howie Ursaner

#22 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 19 September 2017 - 12:23 PM

Thanks for the info, How.

 

Were you able to run Wonder in CanAm?

 

Ricky said he did.


Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#23 Matt Sheldon

Matt Sheldon

    Duffy HMI Executive

  • Full Member
  • PipPipPipPipPipPip
  • 1,661 posts
  • Joined: 19-January 10
  • Gender:Male
  • Location:Platteville, CO

Posted 19 September 2017 - 05:42 PM

I tried them this weekend on various cars. The way they duro out I was thinking they would be somewhere between naturals and treated, but I was wrong as they really sticky up once you get heat into them. They run and feel a lot like blue label Kelly intimidators. We started with a clean track and glue extremely light.

 

For stock car they were too stuck on our hillclimb the last minute of each heat to the point that I could drive out of the slot in the donut. They were the best on my F1, but after how stuck my stock car was, I chose to run naturals for the long haul. For CanAm they worked great early in the day when the clean track was loose and I was able to run sub 5 second lap times, but later in the day after 2 classes of racing there was too much bite.

 

Dont let the semi firm feeling fool you, these are an aggressive traction tire.


Matt Sheldon

 

 

 

 

 

 

 

 


#24 Howie Ursaner

Howie Ursaner

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,293 posts
  • Joined: 01-March 07
  • Gender:Male

Posted 19 September 2017 - 09:15 PM

Yes I was able to run Wonder on the Can-Am
Howie Ursaner

#25 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 19 October 2017 - 10:17 AM

Congrats to Dale Yamashita on his win over the weekend, at BP, on the Flat Track, using the premium JK Premium rubber tires.

In communication with Dale, he said he did some last minute testing and found an extra .05 in speed, on the 2 lanes he had time to try them on.

Dale ran a big 307 laps, but felt he left a lap or 2 on the track, by not testing more, and maybe narrowing them a bit.

And interesting, on the other end of the country, and on a King, at his dad's HVR Raceway, Jimmy Williams Jr. took the wins in GTC and F1, using the Premium tires, running up against wonder and thunder rubber.

From the results, it looks like Ed Sohl gave him a race in GTC, but he had an absolute dominating performance in F1.
  • Tim Wilkins, Jimmy Williams and JK Products like this

Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#26 gotboostedvr6

gotboostedvr6

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,167 posts
  • Joined: 19-July 11
  • Gender:Male
  • Location:Mt. Laurel

Posted 19 October 2017 - 12:11 PM

I would not have even considered using untreated fish on a king.

A testament to the quality of this rubber.
  • MSwiss likes this

Those who work for a living are being quickly overwhelmed by those who vote for a living.

Thomas Jefferson: "Paper is poverty. It is only the ghost of money, and not money itself."
-David Parrotta


#27 Jimmy Williams

Jimmy Williams

    Rookie Keyboard Racer

  • Full Member
  • Pip
  • 21 posts
  • Joined: 02-March 14
  • Gender:Male
  • Location:New York

Posted 19 October 2017 - 01:17 PM

The track definitely was not well prepped compared to past races. The track was considerably loose and I couldn't get my F1 to hook up. As soon as they were put on, I picked up over a tenth and lost the chatter I had with wonder on. In the main, I was the only one to be able to remain on the track and although only being 0.05 to 0.1 seconds faster than the majority, I was able to win by over 13 laps. I do however, believe that that was a one time thing and if the track was prepped better, I would not have run them. Only time will tell.


  • Brian Cochrane likes this

#28 Jimmy Williams

Jimmy Williams

    Rookie Keyboard Racer

  • Full Member
  • Pip
  • 21 posts
  • Joined: 02-March 14
  • Gender:Male
  • Location:New York

Posted 19 October 2017 - 01:24 PM

But let me say, if you are on a track where the favorite tires are treated, untreated or even kelly retros, then the premium rubber is a must try. The rubber is so good and is the least porous rubber I've seen in a long time.


  • JK Products likes this

#29 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 18,268 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 19 October 2017 - 02:04 PM

Thanks for the info.

 

Congrats, again, on your two wins.


Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#30 Pat Skeggs

Pat Skeggs

    Race Leader

  • Full Member
  • PipPipPipPipPip
  • 598 posts
  • Joined: 02-March 13

Posted 19 October 2017 - 09:02 PM

I also ran the premium tire at HVR. The tire was great for that track on that day. If I have to pick a tire that is close to the premium I would go with Retro Kelly's. As a matter of fact I think the premium tire has a little more bite. This tire is a must in everyone's box.
  • MSwiss and JK Products like this

#31 Pat Skeggs

Pat Skeggs

    Race Leader

  • Full Member
  • PipPipPipPipPip
  • 598 posts
  • Joined: 02-March 13

Posted 20 October 2017 - 03:36 PM

I raced the small hub, I'm assuming the regular hub will feel more like Jk treated or untreated.





Electric Dreams Online Shop