2011 Winter Championships Classes and Rules

Body: Must be of a touring car type either 190mm or 200mm width. No truck, oval or wedge style bodies. Bodies can’t be modified in anyway other then what is allowed as designed by the manufacturer of the body. (ie, optional rear wing spacing placement, side wing diffusers) Bodies and optional add-ons (wings, diffusers) must be cut to manufacturer spec, no oversized wings or diffusers allowed. The wing can’t extend higher than the roofline of the vehicle nor can it extend more than 10mm beyond the rear of the body. In addition bodies must be painted (no clear bodies) and on at all times when the car is on the track.

Tires & Wheels: Tire manufacturer is open but tire must be of rubber compound (no foam or exotic mix) and be 24mm width. 26mm will not be allowed. Tire diameters must be a minimum of 63mm to a maximum of 67mm. Traction compound will be allowed but it must be from a manufacturer that is available to everyone. No custom compounds or “home-made” mixes. Rims can be dish or open and can be 0, 3 or 6mm offset. Sedan GT: This class is excluded from rules stated above. This class requires that the vehicles are equipped with HPI X-Pattern Radials (part #4490) for all 4 tires.

Batteries: Batteries will be limited to 2S LiPo and 6-cell NiMh. If using NiMh batteries any manufacturer and capacity will be allowed. 2S LiPo batteries can be of any manufacturer but will be restricted to a maximum of 5000mAh capacity with a max discharge rating of 30C. Sedan GT: This class is excluded from the rules stated above. This class requires that you run a Duratrax 2500mAh NiMh battery pack.

Chassis: Any 1/10th scale 4-wheel drive touring car chassis. Chassis can not be modified or altered in anyway. Optional factory hop up parts will be allowed but no customized shock mounts, body stiffners, roll center mounts, etc will be allowed. Modifications for motor spacing and LiPo battery spacing will be allowed for fitment only. Modifications to allow for greater battery spacing for weight displacement will not be allowed. Vehicles will have a minimum height rule of 4mm under all parts of the chassis excluding the spur gear. All cars have a minimum ready to race required weight of 1420g. This weight is including battery, body and transponder.

Motors: 1/10th Spec Rubber Tire Touring Car; Associated Reedy Radon Motor Required
1/10th Sedan GT Touring Car; Red Cat “Silver Can” Motor Required
1/10th 17.5 Brushless Rubber Tire Touring Car; Any R.O.A.R. approved 17.5 Motor

General: All cars are subject to inspection at any time prior to a race, after a race or both. Winning “main” cars will be inspected after the race to ensure they are still within guidelines and rules. In the event that the car fails post race inspection the second place car will receive the win for that race provided that it passes post race inspection. Any failed post inspection vehicles will be placed (in order that they unofficially finished) at the end of the finishing grid and be awarded points for finishing in those positions. In addition to this, anyone has the right to challenge a vehicles adherence to the rules and guidelines stated above by bringing their concerns to the race director prior to or after a race.

If you have any additional questions please feel free to message me or ask me in person when you see me. All of these rules have been lifted from the R.O.A.R. rulebook that is available to view from there website. Keep in mind that these rules are here in an effort to create a more level playing field and for us to be as fair as possible to provide a fun and exciting racing experience. I look forward to racing with all of you soon!!!!

Awesome.

Good post. It explains it all :)

one thing to add about GT class, it must be the HPI X-pattern tires. #4090.

Yeah, that's in there. Under tire and wheel section. Last sentence in bold it highlights the required use the HPI x-patterns.

i havent been on n a while & i cld even read tht buddy...
dmn i knew i sld of got u thoses glasses 4 christmas

I think we do need to sort out the P/N thing because there are a lot of X-Pattern tires.

4702 are 26mm D-Compound X-Patterns mounted on Split 6 Chrome wheels and IMHO they suck on S&H's carpet track. Everything I've read says D-compound does OK on pavement though. I had some HPI Vintage tires that were also D-Compound and they sucked on the carpet too : ( http://www.hpiracing.com/products/en/4702/

4790 Is the 26mm unmounted D-Compound tire. http://www.hpiracing.com/products/en/4790/

4490 Is the 26mm unmounted Pro-Compound tire. http://www.hpiracing.com/products/en/4490/

4495 Is the 26mm unmounted Pro-Compound belted tire. http://www.hpiracing.com/products/en/4495/

Some others:
4480 Unmounted 22mm Pro-Compound tires. http://www.hpiracing.com/products/en/4480/

4485 Unmounted 22mm Pro-Compound belted tires. http://www.hpiracing.com/products/en/4485/

4733 26mm D-Compound on TE37 Wheels w/0mm Offset. http://www.hpiracing.com/products/en/4733/

4734 26mm D-Compound on TE37 Wheels w/3mm Offset. http://www.hpiracing.com/products/en/4734/

4735 26mm D-Compound on TE37 Wheels w/6mm Offset. http://www.hpiracing.com/products/en/4735/

So what's allowed and what isn't?

Jay,
To answer your inquiry you are correct. There are several different X-Pattern Radials available. The correct one for the Sedan GT class is HPI part #4490. This is what comes pre-glued to the tire/rim package that you can get through Science & Hobby. Sorry about the confusion and thank you for catching it so we can get it cleared up. If you have any other questions just let me know. Will be more than happy to answer for you and look forward to seeing you Sun.