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Choosing the right rim & tire size: 1:10 to 1:8th scale
Many are surprised by the wide selection of RC car tires and rims. In this article we’ll offer some basics tips for finding the right tire size for your vehicle. There are several different size options for cars in these categories, just like for the 1:1 cars. The first thing you want to do is check the manual for the recommended tire and wheel sizes.
Tire sizes:
1:10 Buggy
Most buggies have 2.2” wheels.This means that tires are fitted to 2.2” rims. The tire is narrower and lower profile than the Truck tire. When you’re buying new tires or wheels for your 1:10 Buggy, keep in mind the front and back wheels differ in wideness. You can compare buggy tires below. From the left: 2wd front, 4wd Front and rear tire.
1:10 Truck
In Trucks, the wheels are equally wide in the front and the rear. The front wheels usually have grooved tires and the rear wheels have patterned tires. Rims are same 2.2” diameter than on buggies.
1:10 Short Course
The Short Course cars have their own wheels. The tires will only fit on Short Course rims with a diameter that’s different in the outside and inside of the rim (2.2”/3.0”)
Here is the comparison of 1:10 tires. Starting from the left: 2WD buggy fron, 4WD Buggy front, Buggy Rear, Short Course and 2WD Truck
1:8 Buggy
The buggy wheels are more or less standardized, so you can mix tires and rims from different manufacturers. In 1:8 Buggies you use the same set of wheels both in the front and the rear.
1:8 Truggy
The Truggy wheels differ from wheels of other cars. The outer diameter of the wheel and the rim sizes vary. When you’re picking out a new set of wheels for your car, compare them to the stock ones. Truggies usually have the same tire and wheel size in the front and the rear.
Here you can see Buggy tire on the left and Truggy tire on the right.
Rims
1:10 Rims
There are different ways to mount a wheel, so check how it’s done in your car when you’re buying new rims. Mounting with a 12 mm hex is the most common way, but there are still cars on the market where the mounting method is different.
Hex mount
Cars with 12 mm and 14 mm hex mounting are the most common on the market. Some cars may use different hex sizes, so when you’re about to buy new rims, check what sizes you need. Picture below you can see 12mm Hex on the left and 14mm on the right.
Pin mount
Pin mounting is becoming less common. In rims with pin mounting, there’s a groove on the wheel for the pin that goes through the axle. The availability of this kind of rims is limited, so usually you find it as the stock rims in a car kit.
Bearing mount
Some 2WD cars still have a bearing rim in the front where the tire bearings are inside the rim. Different brands use different bearing sizes so make sure to pick out the correct size to fit your car. The best choice would be the stock rim.
The rim's center hole
The car kits may also differ in the kind of center hole their rims have. It’s important to check the compatibility of the rims from the car's manual. However, it’s not a big issue because usually the axles are 4 or 5 mm thick. It’s easier to make the hole bigger and in hobbyist use, it’s not a problem if the hole is too big because the hex will center the wheel.
Rim offset
Offset has to do with the position of the rim in relation to the center of the wheel hub. Different manufacturers use different offsets in their rims and the differences are usually small. They can be compensated using different width hexes.
1:10 Rims
Buggy
Buggies have different offsets depending on the brand, and there are no comparison charts available for them. In general, the 2WD and 4WD rear rims have the same offset. The 2WD front rim widens the car a bit, whereas the 4WD front rim is closer to 0 offset.
There’s a Slim version of the 2WD front rim available and it’s meant for mat tires, for example Schumacher Minipin, Cut Stagger etc.
In the picture below you can see front rim on the left and rear rim on the right.
Truck
The Truck rims are usually interchangeable if they have the same mounting (hex). If you’re not certain about it, it’s advisable to use the stock rims. Truck rims have more offset which widens the car.
Short Course
You can get Short Course rims with different offsets. Especially 2WD front rims and 2WD/4WD rear rims have their own offsets. The front rim has more offset than the rear. Typically, you have the same rims in both front and rear in 4WD SC cars, whereas in 2WD cars you have different rims in the front and rear. Check the manual for the recommended rim type.
And here is the comparison of 1:10 wheels. Starting from the left: Buggy Front, Buggy Rear, Truck and Short Course
1:8 Rims
1:8 Buggy
The rims in the 1:8 buggy category have become standardized. Usually all the wheels with a 17 mm hex mounting will fit all cars in the category. For this reason, most pre-glued tires are sold to 1:8 cars.
Offset
There are hardly any differences in offsets in standardized buggy rims. Rims from well-known manufactures will usually fit to cars of any brand if they have use a 17 mm hex mounting.
1:8 Truggy
The most common mounting method in this category is 17 mm hex mounting, the same as in the 1:8 buggies. If your car has a different mounting method, the best choice is sticking to the stock rims and tires.
Offset
Truggy rims are usually available with 0 offset and ½ offset. These are easy to tell apart by the location of the mounting point, in the 0 offset rim it’s in the outer surface of the rim whereas in the ½ offset rim it’s in the center inside the rim.
0 Offset = does not widen the car
½ Offset = widens the car
Below you can see a comparison between buggy (left) and truggy (right) rims. Note that Truggy wheel has 1/2 offset and Buggy has 0-offset
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