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Old 03-04-2010, 04:44 PM   #1
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Default Truggy tires.....rounded profile vs. flat profile

Truggy tires.....rounded profile vs. flat profile
What do you use and why? Are there certain conditions where one would work better than the other?



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Old 03-04-2010, 04:55 PM   #2
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I'm not the expert but in my experience the rounded profile is less likely to dig in or catch a rut and traction roll the car,the downside your giving up forward bite because the contact patch is smaller as only the center of tire is digging when going straight.and less sidebite with the rounded profile.
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Old 03-04-2010, 07:25 PM   #3
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That is the biggest fundamental difference I see comparing AKA to Proline.
Proline tires seem to have a round profile and AKA's seem to be flat.
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Old 03-04-2010, 09:02 PM   #4
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Quote:
Originally Posted by Franchise View Post
That is the biggest fundamental difference I see comparing AKA to Proline.
Proline tires seem to have a round profile and AKA's seem to be flat.
AKA does mostly have a flat profile but Proline has both flat and round profiles.


Round profiles have less side bite so you don't traction roll as much, but in turn you lose a little forward bite. Flat profiles can traction roll more, but gives you more forward bite. Or coarse the tire tread will effect side bite and forward bite as well, but if the tires tread are the same, round has less side bite and flat has more. You will want to use a round profile most of the time on a high bite coarse to help stop traction rolling, and a flat profile on a low bite so you can get some side bite and traction to corner. But picking the tire also depends on your vehicles setup and the camber, etc.
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Old 03-04-2010, 09:20 PM   #5
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I'd say PL is just miling their $$ out of the original LPR series.

I tried 1-set of LPR Holeshots; vs. JC Crosshairs (squared up); the LPR's were terrible to drive on. Track conditions were more conducive to the Holeshots working but no dice on the total feel.

They actually tend to traction roll more and are considerably less responsive due to the sidewall flex.

PL VTR, AKA and JC are all about the same width. Pick your compound and tread design and have at it. The newer designs are more responsive and forgiving than the old 'round' design as you call it. Traction and tire wear are improved all around and weight is reduced.

Definitely wouldn't bother with the old LPR series.
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Old 03-04-2010, 09:32 PM   #6
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Round = more corner speed in and out plus the advantage of better handling in wet condtions .

were the flat = more front straight speed (reality a track has corners its not a drag strip .

I prefer round than flat dig into the dirt better

thats my opinion only .

remember under load all tyres balloon to a round carcass anyway .you need flex on the side wall to not traction roll so LPR's are not the way to go .were driving on dirt not tarmac so we need flex
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Old 03-05-2010, 10:28 AM   #7
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Quote:
Originally Posted by COBRARACING View Post
Round = more corner speed in and out plus the advantage of better handling in wet condtions .

were the flat = more front straight speed (reality a track has corners its not a drag strip .

I prefer round than flat dig into the dirt better

thats my opinion only .

remember under load all tyres balloon to a round carcass anyway .you need flex on the side wall to not traction roll so LPR's are not the way to go .were driving on dirt not tarmac so we need flex
Ok you start off sounding like an old LPR (round) fan; then at the end you turn around and denounce them saying they're not the way to go...

What I was saying about the sidwall flex on the LPR's is that the excess 'lip' material that hangs over likes to get snagged in ruts and can cause traction roll and quirky handling; moreso than the newer 'squared up' tire carcass (VTR).

Just my take
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Old 03-05-2010, 11:39 AM   #8
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Quote:
Originally Posted by Franchise View Post
That is the biggest fundamental difference I see comparing AKA to Proline.
Proline tires seem to have a round profile and AKA's seem to be flat.
proline is also less stable and after one run proline are useless, especially calibers since u dont usaully rotate them. i switched to AKA and theres no looking back!
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Old 03-05-2010, 12:45 PM   #9
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Quote:
Originally Posted by mblgjr View Post
I'd say PL is just miling their $$ out of the original LPR series.

I tried 1-set of LPR Holeshots; vs. JC Crosshairs (squared up); the LPR's were terrible to drive on. Track conditions were more conducive to the Holeshots working but no dice on the total feel.

They actually tend to traction roll more and are considerably less responsive due to the sidewall flex.

PL VTR, AKA and JC are all about the same width. Pick your compound and tread design and have at it. The newer designs are more responsive and forgiving than the old 'round' design as you call it. Traction and tire wear are improved all around and weight is reduced.

Definitely wouldn't bother with the old LPR series.
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Quote:
Originally Posted by COBRARACING View Post
Round = more corner speed in and out plus the advantage of better handling in wet condtions .

were the flat = more front straight speed (reality a track has corners its not a drag strip .

I prefer round than flat dig into the dirt better

thats my opinion only .

remember under load all tyres balloon to a round carcass anyway .you need flex on the side wall to not traction roll so LPR's are not the way to go .were driving on dirt not tarmac so we need flex
So you're saying you want sidewall flex? You kidding? If you need more sidewall flex than LPR tires, you're talking like old MT or MTR tires that have been antiquated for years. There are no "big rim"(LPR size) tires that have more sidewall flex than the proline LPR series. There is a reason why we got rid of the massive amounts of sidewall flex found in the old MT or MTR T-Maxx size tires. Side wall flex makes the handling very unpredictable. It doesn't let the suspension do it's work and makes the truck feel sluggish. The ONLY time a taller sidewall would possibly be beneficial is on a SUPER rough track. I'm talking super, super blown out, and even then it's debatable whether or not a tall sidewall is a positive.

So to cast my vote, either square or round in shape, you want a short sidewall. Low Profile is always better. The shape of the carcass doesn't have that great of an effect on handling.
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Old 03-05-2010, 01:16 PM   #10
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Quote:
Originally Posted by JAMMINKRAZY View Post
The shape of the carcass doesn't have that great of an effect on handling.
Round carcass = less traction, faster rotation, better on rough tracks

Flat carcass = more traction, slower rotation, possible traction roll

This is from my experience using different foams in the same type of tire.
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Old 03-05-2010, 01:52 PM   #11
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Originally Posted by trackstarlosi View Post
proline is also less stable and after one run proline are useless, especially calibers since u dont usaully rotate them. i switched to AKA and theres no looking back!
"prolines useless after one run". come on, thats a bit of an understatement.
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Old 03-05-2010, 06:43 PM   #12
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i agree on dane_train post ,from aka cityblock im going back to the bowfighters & it really work on the rough track
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Old 03-05-2010, 07:26 PM   #13
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Quote:
Originally Posted by fatdaddy View Post
"prolines useless after one run". come on, thats a bit of an understatement.
sorry two runs. mason ran calibers two times at arc and now they are rounded and now practice tires.lol holeshots burn up too fast and ive never tried revolvers.
todd- u going to grrs at TA tomarrow?
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Old 03-05-2010, 07:34 PM   #14
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you'll have more traction with rounded tires because everyone in offroad runs their tires at a negative camber so there will be more contact, as opposed to the flat ones.
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Old 03-05-2010, 07:41 PM   #15
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Quote:
Originally Posted by DANE_TRAIN View Post
Round carcass = less traction, faster rotation, better on rough tracks

Flat carcass = more traction, slower rotation, possible traction roll

This is from my experience using different foams in the same type of tire.
That's the biggest difference between the two profiles.
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