foam tires on my xo-1

[teamdavisracing]

i brought a set of foam tires today for my car cause the stock ones just will not hold up on the road,it is a big difference,the car does not spin out as much and i get higher top speed as well as take off on full throttle.the foam tires are(bsr racing tires,1/8 buggy 30 series,part #c8030.if u want real power to the ground buy a full set of these foam tires.

[BennyG6]

let see what they look like on the car ? Higher top speed like over 100? whats the fastest youv ran the foams on XO-1?

[teamdavisracing]

i ran it tonight and it easily pulled 106 mph,will post pics of the tires on the car tommorrow

[Gene C]

Stock slicks outer diameter are 4.29" your BSR foams are 4.07" which are smaller that the stock ones. In turn your stock XO-1 tires dimentions are factored into your telemetry readings on your traxxas app to calculate speed that says your going 106? Or was that GPS? Same is true on an automobile, when you go over or under stock tire size it can throw your spedometer way off + or - 7 to 10 mph unless you calibrate the spedo. Did you factor that in? If not you may want to confirm with gps. I am very intrested in your results and may want to try it myself. But... 105 mph with stock tires was very doable for me with no problem once i had the room to do it. And if those are not being run at 106 more like 96, then i would like to use them for bashing not high speed runs. You are on to something though foams are suposed to be very good for high speed, they dont expand.

[bazookamaxx]

very true, for example my VW has a digital dashboard that you can put in 19" wheels but it doesnt know if I have 40 series tires or 50 series so its off 2 mph at 40 mph and 4mph at 80. Close enough unless going for a world record but ...

[AnthonyV]

Great information here! I was originally going to buy a set of foams but everyone talked me out of it (http://traxxas.com/forums/showthread...2-VIDEO-106mph).

I had issues with my 4 tec nitro and the stock slicks that it came with. Now granted, the XO1's are much wider, they are belted, and look like a 'stickier' tire due to a different compound used (I think). However, when given full throttle my car will lose control on the xo1 tires. I just noticed that I had 2 huge flat spots in one rear tire and a possible broken belt. When going over 50mph I heard a rubbing noise which turned out to be the rear tire ballooning and rubbing the side plastic chassis. I put the car on a stand and monitored the stationary speed (traxxas app) and sure enough the rear tire was shot. I think this is why I was having such issues with spin-outs when I would go 60+mph. The drivers side rear tire would balloon, rub the chassis, then cause the other wheel to put down more traction and cause the car to loose control by pulling to one side more immediately.

So back to the foams... I have used foams on my 4tec nitro 3.3 (64mph) with ZERO issues. They work excellent on the street and I could control this car perfectly on a narrow 2 lane road in my neighborhood opposed to the stock slicks. The XO1 is a different story though, lol. It may be because of the ballooning/chassis issue though... I'll have that solved when my new set of xo1 wheels arrive this week. A wide open area is key... but if the foams offer additional traction and control it's a win win situation... especially if they're 1/2 the cost of a stock set of xo1 wheels.

If you get a chance, try to post up some pictures as well as a video if you have one with the foams. As mentioned, you do have to correct the wheel diameter otherwise you will get skewed readings. It is possible to calculate the difference. The higher speeds the higher your mph will vary.

As far as top speeds, if you can register 90mph on your telemetry and you are not spinning out then you're doing good. I have done a lot of testing with a GPS in relation to the app and I've seen 3-4mph difference below 75mph. I had another spin-out at 70mph and managed to crack the screen on my phone so for now I'm done with using it as a GPS unless I'm running in a completely wide open area. 1000+ft open area's with perfect pavement are not the easiest places to find around Charleston.

I was looking into these foams:
http://www.amainhobbies.com/product_...-Dot-17mm-Soft

For $40/set you can't really go wrong. I think I may give these a shot.

[teamdavisracing]

Great information here! I was originally going to buy a set of foams but everyone talked me out of it (http://traxxas.com/forums/showthread...2-VIDEO-106mph).

I had issues with my 4 tec nitro and the stock slicks that it came with. Now granted, the XO1's are much wider, they are belted, and look like a 'stickier' tire due to a different compound used (I think). However, when given full throttle my car will lose control on the xo1 tires. I just noticed that I had 2 huge flat spots in one rear tire and a possible broken belt. When going over 50mph I heard a rubbing noise which turned out to be the rear tire ballooning and rubbing the side plastic chassis. I put the car on a stand and monitored the stationary speed (traxxas app) and sure enough the rear tire was shot. I think this is why I was having such issues with spin-outs when I would go 60+mph. The drivers side rear tire would balloon, rub the chassis, then cause the other wheel to put down more traction and cause the car to loose control by pulling to one side more immediately.

So back to the foams... I have used foams on my 4tec nitro 3.3 (64mph) with ZERO issues. They work excellent on the street and I could control this car perfectly on a narrow 2 lane road in my neighborhood opposed to the stock slicks. The XO1 is a different story though, lol. It may be because of the ballooning/chassis issue though... I'll have that solved when my new set of xo1 wheels arrive this week. A wide open area is key... but if the foams offer additional traction and control it's a win win situation... especially if they're 1/2 the cost of a stock set of xo1 wheels.

If you get a chance, try to post up some pictures as well as a video if you have one with the foams. As mentioned, you do have to correct the wheel diameter otherwise you will get skewed readings. It is possible to calculate the difference. The higher speeds the higher your mph will vary.

As far as top speeds, if you can register 90mph on your telemetry and you are not spinning out then you're doing good. I have done a lot of testing with a GPS in relation to the app and I've seen 3-4mph difference below 75mph. I had another spin-out at 70mph and managed to crack the screen on my phone so for now I'm done with using it as a GPS unless I'm running in a completely wide open area. 1000+ft open area's with perfect pavement are not the easiest places to find around Charleston.

I was looking into these foams:
http://www.amainhobbies.com/product_...-Dot-17mm-Soft

For $40/set you can't really go wrong. I think I may give these a shot.

i got the same type foams 30-40 on my car but they are made by BSR,i tested it with my gps and clearly got to speed of 106mph lastnight,for these cars foam tires are the only way to go.

[AnthonyV]

i got the same type foams 30-40 on my car but they are made by BSR,i tested it with my gps and clearly got to speed of 106mph lastnight,for these cars foam tires are the only way to go.

That's impressive. How open of an area did you have to hit 106? I've only been able to hit 78mph with an area of 650ft total on the stock xo1 tires. In general, are you getting much better control of the vehicle overall with the foams?

I've got software at my office that will calculate MPH %'s in reference to different size tires/rims/etc. I'll see if it can calculate the differences for the XO1 as well. If not, I'm sure there is a program somewhere online that you can simply plug in numbers without having to sit down and do the actual math.

One thing that I've noticed is that the XO1 tires to balloon at high speeds even though they are belted. This is to be expected of pretty much any drag style tire. To my knowledge, the app doesn't calculate the diameter difference when the tires balloon under high speeds. This of course can lead to skewed results as well with the telemetry. Now that's just being extra picky... as an engineer you learn that nothing holds 100% correct in the real world. Everything that is calculated is pretty much 'all things held equal.' If you've got traction then again from my testing the app is usually within about 3-4mph at speeds under 75mph. At 20mph - 40mph it's pretty much spot on.

Post up some pictures with the foams when you get a chance. Try to get a video posted if possible!

[AnthonyV]

http://traxxas.com/forums/showthread...=1#post5043825

Some good tire info on the xo1

[Gene C]

106 gps with those foams? Intresting! This i gota see! Post some pics or vids when you get time. Good deal!

[BennyG6]

106 gps with those foams? Intresting! This i gota see! Post some pics or vids when you get time. Good deal!

yea Id like to see it also

[AnthonyV]

I've got a set of the BSR foams on order. They should be here later this week. I'm planning on testing them out next Sunday so I'll make sure to post up the results. I've also got a new set of XO1 wheels/tires so I'll be able to compare the 2.

On a side note... I had a blow out yesterday around 75mph on the stock tire:

[TheStenchOfSpeed]

Did the blow out crash the car? Had the tire ever received any severe trauma before hand or do you think it was just wore out??

[AnthonyV]

The blow out did not crash the car surprisingly. I ended up doing some drifts after the tire was shot which really managed to finalize the damage on the tire, haha. I started paying attention to the wear on the tire and I'm going to give it a little negative camber on the new tires to see if I can get a little bit better contact patch. The inside of the tire is not showing as much wear.

I actually purchased the car 2 months used so it's possible that the wheel had pre-existing damage. I think I remember seeing the flat spots originally but I was so excited to buy the car that I didn't care. I noticed a bit of damage to the tire last week when I heard a strange noise at 50+mph. I actually spun the car out a few times which possibly could have led to this damage. Again... I'll never know for sure... it's not a big deal. What ended up happening was a belt on the tire broke where the hole is at and the thinning of the rubber led to the tire ballooning significantly at high speeds. It ended up rubbing on the chassis which led to the vehicle becoming very unstable at higher speeds. This is probably one reason why I was having issues with it sliding sideways on me when given full throttle. Here is a picture of it last week. You'll see there was a tiny hole in the tire so I knew it was going to give sooner or later.



Anyways, I knew the tire was on it's last leg yesterday. I figured I would go ahead and run it anyways for fun while I tried to dial the car and test out the punch control settings. 50% punch control allows for a much smoother trigger transition in my opinion. I wasn't able to do any further testing due to the blow-out as well as hitting low voltage cut off.

[AbSoLooT1]

*Note.... I saw someone running his 100mph Rustler, and he shredded 2 pairs of those foams to bits.....! I would really not run "those" specific foams. It was mrmr1mustang... Videos of those foams, and messed up bad. maybe some other foams would be better?

[AnthonyV]

The BSP's are supposed to be the better of the foams for higher speeds. You may be confusing these with the OFNA's. Check out this link: http://traxxas.com/forums/showthread...=1#post5043825

Seeing as ive ran 100 MPH cars for many years i can tell you PETEV has a 100% true statement.

The ipanemas will reach 100MPH but they will eventual crap out and it wont take that long, i know someone going thru a set of those tires ever 2 weeks.........it adds up quickly the internal foam isn't meant to hold that speed the rubber stays in tact the foam tears apart internally

The sweep are essentially RACE GT TIRES, just like the ipanemas, there meant for racing not high speed they will not last long at 100MPH. They last as long as the ipanemas at high speed BOTH seep AND ipanemas are great GREAT racing tires but for high speed there cost adds up to quickly to keep replacing them at those speeds.

The ofna foams just suck PERIOD, they barely hold up after 70+ ive had several explode on my on nitro high speed set ups. I don't think ofna glues them they just double sided taped on, you can literally peal the foam off the rims with you hands no problem with out much force at all.

And the proline road rages!? really, those things will not last ONE OUTTING AT 100MPH proline uses to soft of a rubber that will simply explode that fast. Risk your car if you want but i know those road rages will not work not to mention out of all the tires listed those are prolly the WORST thing you could use.....Have you seen how they expand at high speed?! image 100MPH I bet they'll expand so far to hit the aero stuff around the chassis.

The only prove 100MPH tires besides the traxxas wheels are the GRP wheels which are exactly 4 inches tall. Ive had a set for 2 years now running almost every weekend at +100MPH and there still going strong. Its that or nothing Ive tryed them all.

Foams wise the BSR foams are much better quality than the ofna, im not sure on the height tho......unfortunantly ive only see one set of BSR foams run in person and i don't know if something was wrong with the car or it was the tires but they sounded like they where tearing apart even tho they never did. It could be thats just the way they sound and they would last for ever like that but who knows. BSR has made many high speed tires that have gone to ISC speed challange and has had success. Id like to give them a chance on my buggies, but on the XO-1 im sure they'll be smaller and then you'd need to raise the car, plus smaller tires equals smaller speed ETC ETC ETC. and seeing as the XO-1 is already maxes out on gearing any smaller tire will turn it into a 90+ or - mph car and not 100MPH and we cant have that can we?!?!?!?!?

[Gene C]

i ran it tonight and it easily pulled 106 mph,will post pics of the tires on the car tommorrow

YO! Did you start another thead somewhere else? Lets see some photos of these foams that you pulled 106 with or are they shreded allready? Don't leave us hanging, Lol!