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Old Nov 28, 2012, 03:28 PM
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ChrisH, you think this would be an option worth testing in your rear insert mod if I try to do it? http://www.amainhobbies.com/product_...nsert-Set-Soft
John they are pretty much what I have been using in combination with the front tyre inside the rear. They are a soft foam though. The harder foams work better. Like TJ said, 1/5 hip inserts look about the right size without having to glue them and use a front tyre. Will look into them. The truggy foam feels almost like the std one to feel by hand in the tyre. Hope it works at least as well but lasts longer.
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Old Nov 28, 2012, 03:52 PM
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Price goes up quite a bit when looking at the 1/5 foams. I was looking at this during shopping spree but didnt have wheel measurements so I passed. http://www.amainhobbies.com/product_...oft-190x60mm-2
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Old Nov 28, 2012, 04:00 PM
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Price goes up quite a bit when looking at the 1/5 foams. I was looking at this during shopping spree but didnt have wheel measurements so I passed. http://www.amainhobbies.com/product_...oft-190x60mm-2
Although dearer, you could maybe make two up out of them and also get a lot more life than the std insert so could still be ok value. I'll get one to try maybe and let you know how it goes.
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Old Nov 29, 2012, 02:22 AM
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Here's the first test run of the truggy insert. Seemed to feel very similar to the std one in most ways but didn't have as much roll ( slightly firmer ). Still worked ok on the dirt but I prefer a softer feeling insert to reduce the deflection off the rock ( in some places the track is like a dry rocky creek bed for real bikes ) and bumps in places on the track. The grip level seemed pretty good and the bike was just as predictable as with the std one. What I did notice was when I went wide onto the grass, because of the firmer feel the bike turned really well at speed. I think this would be a great grass or really grippy track tyre setup. I'll have to wait for that rain TJ ha ha. Time will tell if this material lasts longer than the Atomik one.
MM450 truggy insert test (2 min 10 sec)

Here's a pic of what the tyres have to cope with .
http://www.rcgroups.com/forums/newat...anageattach&p=
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Old Nov 29, 2012, 03:11 AM
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And one more for good measure
http://www.rcgroups.com/forums/newat...anageattach&p=
The big rock in the pic is about 1 inch high by 2 inches wide. These rocks are all through this area of the track.
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Old Nov 29, 2012, 10:43 AM
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And one more for good measure
http://www.rcgroups.com/forums/newat...anageattach&p=
The big rock in the pic is about 1 inch high by 2 inches wide. These rocks are all through this area of the track.
Scale that up to full scale bikes = bent rims and broken bones!
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Old Nov 29, 2012, 03:37 PM
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Scale that up to full scale bikes = bent rims and broken bones!
Exactly Dave that's pretty rough terrain for a MX track lol. I have broken a few rims on the big rocks hanging out of the ground. No broken bones for Deegan though lol. Also the rock may help pulverise the std foams to dust.
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Old Nov 29, 2012, 06:50 PM
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Exactly Dave that's pretty rough terrain for a MX track lol. I have broken a few rims on the big rocks hanging out of the ground. No broken bones for Deegan though lol. Also the rock may help pulverise the std foams to dust.
No doubt!
Talking about rocks-
I should tell you about the two major incidents I have experienced with big rocks in my dirt bike racing and riding career. They easily could have been "near misses" but they weren't. lol Can't do it now because it would take me an hour as slow as I type! maybe later tho'
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Old Nov 29, 2012, 07:19 PM
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No doubt!
Talking about rocks-
I should tell you about the two major incidents I have experienced with big rocks in my dirt bike racing and riding career. They easily could have been "near misses" but they weren't. lol Can't do it now because it would take me an hour as slow as I type! maybe later tho'
Tell me about it Dave, the worst thing is when you are behind someone and can't see the rocks for the dust.
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Old Nov 29, 2012, 08:34 PM
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Truggy tires and foam inserts are as close as it gets to the size of the VMX rear wheel.
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Old Nov 29, 2012, 09:49 PM
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1/5 hpi baja insert looks closer.
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Old Nov 29, 2012, 10:02 PM
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nice find tj,thank you for posting picture.they look real close.
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Old Nov 30, 2012, 12:36 AM
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1/5 hpi baja insert looks closer.
Looks pretty good TJ. How wide are they? Could you cut them down the centre to make two?
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Old Nov 30, 2012, 05:07 PM
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I think this would be a great grass or really grippy track tyre setup.
The ''glaswegian insert'' on the M5 seems to do very well on grass with an even and smooth surface.I'll bet any Arx450 owner will concur. As Gartenzweg was speculating about hard inserts being the best way on road, so I suspect nice flat grassed ground (eg Millenium Stadium, Cardiff) would be best with a rock hard insert.

The problem of course is all the little stones, that scaled up, become huge monsters! That's where this thread belongs. Finding what works in less than Savile Row Pressed surfaces.
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Old Nov 30, 2012, 06:42 PM
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The ''glaswegian insert'' on the M5 seems to do very well on grass with an even and smooth surface.I'll bet any Arx450 owner will concur. As Gartenzweg was speculating about hard inserts being the best way on road, so I suspect nice flat grassed ground (eg Millenium Stadium, Cardiff) would be best with a rock hard insert.

The problem of course is all the little stones, that scaled up, become huge monsters! That's where this thread belongs. Finding what works in less than Savile Row Pressed surfaces.

The truggy insert is not rock hard by any stretch. It is however slightly stiffer and more resistant to roll than the std insert. This is why I say it would be best suited to higher traction conditions. It still handles bumps and rocks quite well, I just prefer a slightly softer feel. I'll keep searching and maybe try a HPI one next.
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