Originally Posted by Piles

The last point you make here is incorrect. It is actually the other way round.
The B7 will have a 6.5mm width hex and the B7d a 5mm width hex.
This is quite strange because as you say it would be wiser the other way around to maintain a similar intersection between the kpi and the centte line of the tyre. As a result, the intersection of those points between the two cars (assuming the dirt car will use wider wheels and tyres) will result in the scrub radius between the two cars being very different indeed.
Who knows AE may very well have done their homework and found that this is the fastest way around the track for the cars. We shall see.

Originally Posted by RogerM

The problem with the Xray was two fold. 1) screws went into plastic not metal like the B7 2) the screws were too short and there was no location feature for the D-block so the joint wasn't very strong in shear. I don't see the Schumacher cars ripping the rear end off often, the front end definitely but not the rear :-)

Originally Posted by Piles

The last point you make here is incorrect. It is actually the other way round.
The B7 will have a 6.5mm width hex and the B7d a 5mm width hex.
This is quite strange because as you say it would be wiser the other way around to maintain a similar intersection between the kpi and the centte line of the tyre. As a result, the intersection of those points between the two cars (assuming the dirt car will use wider wheels and tyres) will result in the scrub radius between the two cars being very different indeed.
Who knows AE may very well have done their homework and found that this is the fastest way around the track for the cars. We shall see.

Originally Posted by Brian L

That is correct. If you look at a dirt tire, the tire bulges over the rim, a carpet tire is almost flush with the rim

Originally Posted by Kraig

Maybe you seen this but maybe you didn't, but at 1:21 into the video Brent and Matt are talking about the B7.

Clash of Champions B7 discussion with Brent.

Originally Posted by Kraig

Maybe you seen this but maybe you didn't, but at 1:21 into the video Brent and Matt are talking about the B7.

Clash of Champions B7 discussion with Brent.

Originally Posted by Piles

The last point you make here is incorrect. It is actually the other way round.
The B7 will have a 6.5mm width hex and the B7d a 5mm width hex.
This is quite strange because as you say it would be wiser the other way around to maintain a similar intersection between the kpi and the centte line of the tyre. As a result, the intersection of those points between the two cars (assuming the dirt car will use wider wheels and tyres) will result in the scrub radius between the two cars being very different indeed.
Who knows AE may very well have done their homework and found that this is the fastest way around the track for the cars. We shall see.

Originally Posted by Jonnywachter

Maybe the offset has nothing to do with KPI and its just to push the width to the limit of the rules? Maybe more scrub radius is desired in carpet?

My explanation would have been the same as Roger had you not brought this up.

Originally Posted by RC10Nick

My suspicion is it's simply a desire to get the car to max width now that the latest generation of carpet tires are way more narrow than they used to be. The size difference between dirt tires and carpet tires is so drastic nowadays that it doesn't surprise me to see manufacturers beginning to account for those differences in the car's design.

Originally Posted by Brian L

That is correct. If you look at a dirt tire, the tire bulges over the rim, a carpet tire is almost flush with the rim

Originally Posted by Bcollins82

I am guessing not only are the carpet versions wider to get it to max width, but also to get more scrub radius. Carpet cars seem to benefit from the weight jacking effect a higher scrub radius gives to keep the car turning coming off the corner.

Originally Posted by RogerM

Yes, I apologise for this. It has been a VERY very long time since I have seen a dirt tyre in person and forgot they overhang the rim significantly.

There is a benefit of having more scrub radius on carpet as it increases jacking and makes the car more reactive and twitchy, good if the grip is there to support it and your driving style copes with such an aggressive car.

Once I have the car in hand I will take all the measurements needed to calculate exactly what will be best when. Hopefully not too much longer now :-)

Originally Posted by warracer

I'm really not a fan of AE in general, but I gotta say this B7 looks pretty cool. I can really appreciate AE going in a more drastic design direction rather than just lightly updating the B6 platform again.

Lots of new ideas are being tried and that's really interesting, can't be a bad thing for the hobby.

Originally Posted by staiguy

Im kinda hoping someone can figure out a belt fed 2wd buggy. Cuz why not

Originally Posted by MTY500

Here's a pic I snapped of Kurt Wenger's car from the Clash of Champions this past weekend.

Originally Posted by Mac The Knife

LikeSchumacher did with their Cougar KF?

Originally Posted by daz_75

Those tyres are nuts for us uk drivers