front wheel 4wd jconcept tires

[Rozzy]

i just got jconcept goosebumps for the front wheel on my 4wd buggy the inserts that come with them do we need to cut them down ??

[Richard Lowe]

It depends on how you want the car to feel, I usually cut to the width of the wheel and start from there :)

[NitroArgi]

It depends on how you want the car to feel, I usually cut to the width of the wheel and start from there :)

Can you please explain that? I mostly race 1/8 buggy so I have still to learn 1/10 "secrets"!

[Richard Lowe]

It depends on quite a few things, sometimes the same change (wider foam for example) can do the exact opposite to what you expect.

If you have a soft surface you might find you will get more grip with a firmer/bigger insert, as the harder foam forces the spikes to dig in.
On a harder surface a softer foam might give more grip as it collapses it presents more surface area to the track.

Because there are so many factors involved the best thing to do is experiment, what's the surface like you are running on, and what tyres are most people finding work best?

[NitroArgi]

In the Greece there are two race tracks that we use for this year's racing.

Although both are only dirt the first one is a small tecnical track with low traction. I started this season with LOSI Studs in my B44 but I found really fast that Proline Bowtie at the back with some old Proline Stubbies work really great on this surface. I also got some JCONCEPTS Goosebumps as well which I think will work great!

The other track is much bigger and was hard packed for the first race. I used JCONCEPTS Barcodes and my car was performing really great much like a touring car!

So what's the best thing to do in order to have more traction from the goosebumps in the small tecnical track?

Regards
Argiris

[Richard Lowe]

How dusty is the smaller track and how hard is the surface?

If the Proline compounds work better than Losi then the JC tyres should be even better as from my (limited) experience with dirt tyres the JC rubber is similar in feel the Proline.

It's very hard to go wrong with Green compound Double Dee's, as every time I've used them no-matter what the dirt or conditions they have worked great - they seem to have a very wide window when they will work.
Goosebumps are very simlar in that regard, except they will be better on the dustier/looser end of the scale, where the Double Dee's will be better suited to harder/less dust.

Does a smaller pin tyre like a Holeshot get clogged with dirt on the smaller track?

[NitroArgi]

Hello mate!

It can be very dusty, especialy after the qualifications. I have tried Holeshots and they were ok in the clear part of the track. I soon as I went throught the dusty part I had no brakes and no traction!

My guess is that Goosebumps will work great there....the question is should I play around with the inserts?

[Richard Lowe]

If Holeshots have trouble in the dust then Double Dee's will too, in which case it sounds like Goosebumps will be awesome ;)

To start with use the inserts that come with the tyres, leave the rear as it comes out of the packet and cut the front to the width of the tyre and see how the balance is. If you need more steering cut the front a bit more (width of the wheel), if you need more rear traction again cut the insert to the width of the wheel.

Don't forget to always cut the outer edge of the insert to 45 degrees to fit the shape of the tyre better! I'll try to illustrate but the forum messes up the formatting :lol:
_____
/_____\

_____
\_____/

[NitroArgi]

Thanks for the tips!

I will try them out next weekend I will let you know what I think! I also cut the the inster with to 45 degrees in both sides (inner and outer)

[NitroArgi]

Hello again,

I had a long day practising at the track where the next race will take place in Oct. 4th.

I had a good chance to test several things in the nine hours I was there and I gave the goosebumps a go. I have to say that I was excpecting a lot better performance from them in my B44.

At the beginning the track had a lot of moisture and the traction was ok but as soon as the track was dry and there was dust things went from ok to horrible...I soon as I went back to the combo Proline Bowties at the rear with Proline Stubbie in front the car was dialed!

I quess that will be my choice for the next race...I may give the front Goosebumps a go with the Bowites because I like the turning of the JC