American Racer Tire Help
 

Can anybody help me with some tire info? I got some "new" American Racers from a couple of years ago but I'm not sure what the compounds are. I have several new SD-23B's and a couple of SD-28.

I know back in the day there used to be a sythetic rubber but don't remember how to identify it. Does anybody else still run these tires anywhere?

I would sell a few of these if anybody wants one to run Paragon next week.

Re: American Racer Tire Help
 

23 and 28 are pretty soft. I had a chart somewhere that compared compounds between Hoosiers and American Racers. A SD-23 was like the equivalent of a D10 Hoosier, and and a SD-33 is the equivalent of a D12.

Re: American Racer Tire Help
 

If they are anything like the tq american racers teh sd23 is a pretty soft tire

Re: American Racer Tire Help
 

SOFTER- SD-23, SD-28, SD-33, SD-35, SD-38, SD-44, SD-48, MD-50, MD-53, MD-56, MD-57, HD-65, HD-70- HARDER

Tim Clauson

PM me - we ran AR for the 2004 and 2005 season, I have some notes if interested

Re: American Racer Tire Help
 

If the same as TQ's, the 23 "B" is as soft as a 23, but wears like a 28.

Re: American Racer Tire Help
 

tim,
does the sidewall stiffness increase as the tires get progressively harder or do the sidewalls stay basically the same but the tread compound gets harder?

Re: American Racer Tire Help
 

Originally Posted by c47:
tim,
does the sidewall stiffness increase as the tires get progressively harder or do the sidewalls stay basically the same but the tread compound gets harder?

Back in the day we ran between a 23 and a 38 and then jumped to the MC2

Between the 23-38 there was small but not a huge noticeable difference between the sidewall "flex" There was as much spring rate change tire to tire as there was compound to compound. The big difference was when you got to the MC2.

The way I rated my tire spring rate was a bit primitive to be honest but it was nothing I was concerned with when changing compounds.

Hope that made sense ..

Tim Clauson

Re: American Racer Tire Help
 

The 23B's are a soft tire the B stands for Belted and were for more for a wing car,If I remember right the sidewalls in the Belted tires are stiffer,I bought several of these years ago a Daytons auction when I ran wing cars at Knoxville

Re: American Racer Tire Help
 

AJ, wonder if we were sold a bill of goods? I was told the same story,the B, worked like a regular SD, cold, but when hot, didn't wear like that number. I have one, ready to recycle, I'll ck to see what is under the rubber. Bob

Re: American Racer Tire Help
 

Originally Posted by jjsprt92:
The 23B's are a soft tire the B stands for Belted and were for more for a wing car,If I remember right the sidewalls in the Belted tires are stiffer,I bought several of these years ago a Daytons auction when I ran wing cars at Knoxville

Thank you, I didn't know what the "B" was for, that is a big help.

Thanks to all of you for your help, I really apreciate it. I really like the AR tires expecially at Paragon.

Re: American Racer Tire Help
 

The SD-23 is softer and is not in production any longer, the SD-28 compound has been changed to the SD-30.

The SD-23B tear strength of rubber was greater than standard SD-23,

The "B" in the compound does not mean BELTED

Tony Rose

Re: American Racer Tire Help
 

Thanks, Tony, that's what I thought, but if ya just "think", it's better to keep out of it, and let someone that "knows", tell it like it is. Bob

Re: American Racer Tire Help
 

Originally Posted by Motormasher:
Can anybody help me with some tire info? I got some "new" American Racers from a couple of years ago but I'm not sure what the compounds are. I have several new SD-23B's and a couple of SD-28.

I know back in the day there used to be a sythetic rubber but don't remember how to identify it. Does anybody else still run these tires anywhere?

I would sell a few of these if anybody wants one to run Paragon next week.

Dave, THE 23 isn't that great at Paragon unless you have a tacky track and an early heat race. The 28 is only slightly harder, and if I recall has the big block pattern and is a good early in the night choice. I ran American Racers for 19 years and my preferred tire at Paragon was a 17inch sd33 for the heats on a normal night and if the track wasn't going to take rubber in the feature it was great also (or if it was only going to take it late in the race, like the last 6-8 laps. the 33 would make it ) If you know the track will rubber up for the features, if you're running the second feature and want to be fast and have the tire make the distance, don't run anything less than a sd44 or it will wear through if the track is rubbered down. The tires you mention, from my experience and opinion, are not the best choice of AR tires for Paragon. Why don't you run there next week? I'll be available if you need a hand.

Re: American Racer Tire Help
 

Originally Posted by sprint38racer:
Dave, THE 23 isn't that great at Paragon unless you have a tacky track and an early heat race. The 28 is only slightly harder, and if I recall has the big block pattern and is a good early in the night choice. I ran American Racers for 19 years and my preferred tire at Paragon was a 17inch sd33 for the heats on a normal night and if the track wasn't going to take rubber in the feature it was great also (or if it was only going to take it late in the race, like the last 6-8 laps. the 33 would make it ) If you know the track will rubber up for the features, if you're running the second feature and want to be fast and have the tire make the distance, don't run anything less than a sd44 or it will wear through if the track is rubbered down. The tires you mention, from my experience and opinion, are not the best choice of AR tires for Paragon. Why don't you run there next week? I'll be available if you need a hand.

I would love to have your help..... planning on going back if I make it through "the Put" tomorrow night.... lol....thanks for the info :6:

Re: American Racer Tire Help
 

Then if the B doesnt mean belted why do the ones I bought that have the B on them also say Belted on the side and Donna Dayton(Tyler) say thats what they were during the sale