2wd Buggy
All buggies are limited to cars produced 1995 or earlier.
27 turn ROAR legal stock and 17.5 brushless motors only (under current rules).
Radio gear “electronics” are open.
Tires/wheels are open
Li-Po batteries are allowed.
(Examples: RC10, RC10B2, JRX2, XX, Ultima, Triumph, ProX, TRX)

Stadium Truck
All trucks are limited to cars produced 1995 or earlier.
27 turn ROAR legal stock and 17.5 brushless motors only (under current rules).
Radio gear “electronics” are open.
Tires/wheels are open (including narrow front tires)
Li-Po batteries are allowed.
(Examples: RC10T, RC10T2, JRXT, XXT, Outlaw Ultima, Pro XRT, Eagle, SRT)

4wd Buggy
All buggies are limited to cars produced 1997-2004.
10.5 brushless motors only.
Radio gear “electronics” are open.
(Examples: XX4, XXX4, TC3″O”v2, MX4, MR4BC, BJ4, Cat 2000, Lazer ZXS)
 

Heavy Metal
All 1/10 Monster Trucks, 2wd or 4wd, 2ws or 4ws are limited to cars produced 1995 or earlier.
27 turn ROAR legal stock and 17.5 brushless motors only (under current rules).
Radio gear “electronics” are open.
Tires/wheels are open (including narrow front tires)
Li-Po batteries are allowed.
Classes are broken up into two subcategories that race together. HM1 is for larger tire trucks (Examples: Clod Buster, USA-1, etc) and HM2 is for racing monsters (Examples: Blackfoot, King Cab, etc.)
HM2 trucks must be “monster truck” style trucks meaning no low cg/racing style chassis or racing inspired vehicles. If you put racing tires on it and it looks like a stadium truck it will not be allowed. Trucks must be raised and in the style and spirit of monster trucks. (Specifically the Futaba FX10 and MRC MT(M & S), Stadium Blitzer/Beetle etc are no longer allowed. They will be allowed to run in Classic)

Classic 
All buggies are limited to cars produced 1995 or earlier.
Limited to “non-pro” and entry level style cars. Must have plastic tub chassis.*
All 1/10 Buggies, 2wd or 4wd, 2ws or 4ws allowed
Handout Tamiya RS540 motors only
Radio gear “electronics” are open.
Tires/wheels are open (including narrow front tires)
Li-Po batteries are allowed.
(Examples: Tamiya Hornet, Mauri Ninja, Royal Ripper)

Classic 4wd Buggy
All buggies are limited to cars produced 1996 or earlier.
13.5 brushless motors only.
Radio gear “electronics” are open.
A car that’s run in 4wd Classic may not be entered in 4wd buggy class
(Examples: YZ10, Optima, Javelin, Lazer, etc.)

Wheelie
Limited to Tamiya 1/12 2WD “Wheelie” vehicles
Rereleases, Comical and New Models allowed
No modifications allowed, vehicles must remain box stock except speed control, battery, servo and receiver. Truck must remain box stock.
Silver can Mabuchi/Johnson 540 motors.
Radio gear “electronics” are open.
Tires/wheels must remain stock, NO INSERTS or saucing.
Li-Po batteries are allowed.
(Examples: CW01 and WR02 2wd: Lunchbox, Midnight Pumpkin, Wild Willy, Mitsubishi Pajero, Honda City Turbo, Suzuki Jimny)