We currently stock two main types of pit bike wheel: 'SDG' and 'classic'.

 

SDG hubs always use a 15mm axle / spindle. Classic hubs always use a 12mm axle / spindle.

 

Some pit bike manufacturers, such as Thumpstar, have used non-standard wheel sizes on their bikes. Please bear this in mind when replacing any of your wheel components. These wheels will normally also use 12mm axles, but will not take a classic rim without undertaking some significant alterations to your brake set-up and spacers.

 

Most recent pit bikes, such as Stomp and Demon X models, use the more common SDG type.

Above image: SDG wheel rim. Notice the dumbbell-shaped hub. Uses a 15mm axle.

 

Classic wheel rims are becoming more uncommon, which inevitably means that the price of them will be greater than their SDG relations.

Above images: Classic wheel rim. Notice that the hub is much more chunky than on the SDG type. Uses a 12mm axle.

 

We sell SDG and classic wheels in three variations: rim only, rim with standard tyre, or rim with performance Kenda tyre. If you are serious about racing and want the longer life and increased traction that is delivered by branded tyres, we recommend that you opt for a pair of Kendas.

 

If you are not immediately aware which type of pit bike wheel you have it is always a good idea to measure your existing wheel. We provide detailed dimensions for most of our wheels for our customers to refer to.

 

Please find a clarification of exactly what these dimensions refer to below:

 

What do the measurements in the dimensions table refer to?

 

 

  • Inner diameter of the axle hole: the inner diameter of the hole, through which the axle/spindle fits. On a pit bike wheel, this will always be either 12mm or 15mm, depending on the type of wheel it is. Classic wheels have an axle hole of 12mm, SDG wheels have an axle hole 15mm
  • Rim diameter:  the outer diameter of the wheel rim, as it sits inside the tyre. This could be 10”, 12” or 14”. This dimension is always rounded to the nearest inch
  • Rim width: the width of the wheel rim, if it was to be looked at side-on, with the tyre removed. This is measured from the inside of the left lip to the inside of the right lip. The lips are the sections in which the inside edge of the tyre sits
  • Axle hole length: the total length of the hole through which the axle/spindle fits. This is measured from one side to the other, and will usually be the widest section of the wheel
  • Diameter of fixing holes: the distance across the inside of each of the wheel’s fixing holes, on which the sprocket of brake disc mounts
  • Greatest distance between disc fixing holes: the diagonal distance between the fixing holes that attach the brake disc to the wheel (not applicable to drum-braked wheels). This measurement is always stated centre of eye to centre of eye
  • Shortest distance between disc fixing holes: the shortest distance between the fixing holes that attach the brake disc to the wheel (not applicable to drum-braked wheels). This measurement is always stated centre of eye to centre of eye
  • Diameter of mounting section on which disc fits: the diameter of the raised section, on which the hole in the centre of the brake disc sits (not applicable to drum-braked wheels)
  • Greatest distance between sprocket fixing holes: the diagonal distance between the holes that attach the sprocket to the wheel (only applicable to rear wheels). This measurement is always stated centre of eye to centre of eye
  • Shortest distance between sprocket fixing holes: the shortest distance between the fixing holes that attach the sprocket to the wheel (only applicable to rear wheels). This measurement is always stated centre of eye to centre of eye
  • Diameter of mounting section on which sprocket fits: the diameter of the raised section, on which the hole in the centre of the sprocket sits (only applicable to rear wheels)
  • Inner diameter of drum: the distance from the one side of the brake drum to the other, across the inside. This is the section in which the brake shoes will fit (only applicable to drum-braked wheels)
  • Outer diameter of drum: the distance from the one side of the brake drum to the other, measured on the outside of the drum. The drum is the section in which the brake shoes fit (only applicable to drum-braked wheels)

 

 

 

If you are in any doubt over which pit bike wheel is right for you, please call Sales on 02476 398 085. Alternatively, contact us at: sales@petrolscooter.co.uk