Custom rear sprockets for motorcycles - made to order

What you can order

Every custom rear sprocket is cut to the measurements you send us, so the size is up to you rather than to a catalogue. In practice riders order:

• Steel sprockets - up to 50 teeth, 51 to 60 teeth and 61 to 80 teeth. Heavier, but they take abuse and last far longer on a stunt bike.
• Aluminium sprockets - up to 50 teeth and 51 to 60 teeth. Much lighter, the usual choice when you want to cut rotating weight.

Oversize rear sprockets are standard in stunt riding. A 55 or 60 tooth sprocket shortens the gearing so the front wheel comes up earlier and the bike pulls hard at low speed, at the cost of top speed. Think about where you ride before you pick the tooth count: for wheelies and circles go big, for street riding stay closer to stock.

How to order a custom sprocket

Send us four things and we will tell you what we can machine:

1. Number of teeth you want.
2. Chain pitch - 420, 428, 520, 525 or 530.
3. Motorcycle model and year, or, if the wheel is not stock, the mounting dimensions: bolt circle diameter, number of bolts and bolt size.
4. Material - steel or aluminium.

If you are not sure about the mounting pattern, measure the old sprocket and send photos. We have been making sprockets to order since 2010 and most questions come back answered the same day.

Steel or aluminium?

Steel is the safe pick for a bike that spends its life in a car park doing circles: it survives chain slap, dropped landings and dirt. Aluminium takes weight off the rear wheel, which the engine feels straight away, and it is the usual choice for a lighter gear setup. Both are machined to the same precision; the difference is durability against weight.

Finish and design

A custom sprocket can be cut with your own pattern. We have produced hundreds of designs over the years, from plain stunt sprockets to one-off patterns for custom builds.

The rest of the drivetrain

A new rear sprocket changes the whole transmission, so check the chain length and the front sprocket at the same time. Browse ready-made rear sprockets, front sprockets, chains or a complete chain drive kit with the ratio already matched.

Making it last

Keep the chain clean and correctly tensioned, and replace the sprocket and chain as a set. A worn chain will eat a new sprocket in weeks, which is the most common reason a custom sprocket dies early.