Supersprox Choose Your Gearing sprocket RST-1304 in a choice size and colour including Gold, Blue, Black, Red or Silver.
Standard sprocket sizes are available using the general bike filter. If you're considering adjusting your gearing, please see the Adjusting your gearing tab.
This is sprocket available as a Stealth or Steel Sprocket, if you would like more information on Supersprox sprockets, please see here
WSC Performance are an official distributor for Supersprox and can offer a full range of Supersprox sprockets. The items listed as in stock are available for delivery, out of stock items are usually on back order and have a variable delay in delivery.
If you'd like an estimated delivery on out of stock items, or you can't find the colour or size you're looking for, please ask
525 Pitch
Choose your sprocket size
112mm Centre,
138 PCD
5x 10.5mm bolt holes OR 5x 12.5mm bolt holes
We as bike riders like to shop in two ways for a chain and sprockets.
We either
Want to know what was on the bike without counting all the teeth, links, and having to read the manual, or
We want choice
A bike comes out the factory with gearing suitable for most roads and most conditions, but it is always a balance. If you ride high speed roads all the time, or just go on a out on a country road blast, the requirements of the gears is very different.
If you ride track days or race, the variations will be even more important, more acceleration, higher top speed or maybe longer or shorter wheelbase; there are so many combinations.
Riders will often have a preference, but that may not suit you, so always feel free to try different gearing ratios- especially if you ride on the track. Your efforts won't be wasted, even if you find the +3 on the rear isn't quite right at Donnington; if you only ran it for a day, it'll still be fresh, and you you can use it again, and may find it's perfect at Mallory Park.
General Rules
Changing the front by 1T equates to appoximately 3T on the rear
Reducing the number of teeth on the front has the a similar effect as increasing the number of teeth on the rear. And vice versa
Reducing the front/Increasing the rear - Increases acceleration
Increasing the front/Reducing the rear - Increases top speed
View our gear ratio chart below to see how adjustments will affect your bike
Work out where the standard ratios of you bike sits, then see what your desired combination will become. The bigger the difference, the more the change.
Each kit is created with a pair of Supersprox sprockets (View more on Supersprox here) and a DID chain or an Orange Afam XHR for KTMs.
Standard Gearing* - This kit is available with either a DID VX Pro Street Chain or the top spec DID ZVMX Superstreet chain.
Choose Your Gearing - This kit comes with a choice of front and rear sprockets, and a choice of chains from DID or Afam (KTM only at present).
To find your new sprocket kit, Click Here. Where you can filter the available bikes to find that kits available.
If you don't need a full kit, you can also buy Chains and Sprockets separately.
Chain Length
Consider that you want a chain to fit the sprockets that you are purchasing. If the bike takes a standard chain of 112 links, and you are increasing the sprocket by 3 teeth, its likely the original chain length will fit, although this will slightly shorten your wheel base, and you may want a 114 Link chain. Most importantly, you can always shorten a chain, but you shouldn't ever lengthen it. Spending a couple of quid extra on a longer chain, saves you a lot against having to get another one.
As a result, any "Choose Your Gearing" kit, comes with a 120 Link chain to allow you to make adjustments as required.
If you know the size you want, choose your kit individually.
Looking for a guide on how to change your sprocket - see our friends at I Like Motorbikes video
*We check multiple sources to establish the original spec chain and sprockets, but unfortunately, we may not always be right. If you buy a kit and subsequently find we have given you the wrong information, please contact us, we will replace any incorrect products for free; providing they are unused, under our 30 Day Returns Guarantee. Some bikes (Especially KTMs) will come out the factory with a different chain and sprocket on the bike than is listed in the manual, we stick to what we know from manuals, manufactures info and our completion. If you find differently, please let us know and we'll happily research and correct our information where required.
Please consider which length of chain you require as we cannot be responsible for damage caused by poor fitment. If you are increasing your sprocket size, after about a 2 tooth increase its worth increasing the number of links. Remember, you can always shorten a chain, but shouldn't ever extend it.
If you have any questions or require something not listed, please contact us.
Dispatch times
The dispatch of In Stock orders is completed daily. Monday-Wed, purchases placed before 3:30pm are usually dispatched on the same day, This is variable on a Thursday and a Friday. but all orders will be dispatched within 1 working day.
Some items are listed as To Order in the product listing including Brake discs and Exhausts and these will be dispatched within 3 working days.
SAMCO offer a large selection of hoses, some show as In Stock, these are stored in our warehouse and are ready for delivery. Others are listed as available to order with a 5-6 week delivery time. However, if our supplier has stock of this product, it will be dispatched sooner.
If there is to be a delay in dispatch for longer than the above times, you will always be notified by email.
Free delivery to UK Mainland
All purchases placed at www.wscperformance.co.uk and shipped to mainland UK include the cost of delivery. That means the price you see is the price you pay. There will be no extra charges at checkout.
Small Items/under 2Kg - These are posted by using Royal Mail 2nd class service**. This can be upgraded at checkout.
Large items/over 2kg - All larger items above 2kg will be sent using a 2-3 day courier. This is a tracked service, and usually takes 2-3 working days. This can be upgraded at checkout.
Express 48Hr Shipping
Some items are listed with a priority shipping method, this will always be shipped on a next day service but courier collection may be delayed until the following day (See Dispatch times), so we can only estimate a delivery time of 48hrs when purchasing through the website. If you require a next day service, please contact us at simon@wscperformance.co.uk and we will advise if we can get it to the courier.
We will not be liable for any loss or damage suffered through delay in either dispatch or courier delivery, however, if such delays occur, you will be informed as soon as practicable.
Offshore UK Deliveries
Free Delivery excludes Shetland Islands (ZE), Outer Hebrides (HS) and Isle of Man (IM), to which there is usually a surcharge. We're constantly adding to the shipping options, but if your location is not listed, please contact us to arrange.
International Deliveries
We also deliver worldwide. Delivery charges are calculated at checkout, and we are constantly adding countries to our delivery list. If your country is not listed, please ask.
If you have any questions or alternative requirements, please contact us. We can sort most things, although sadly, some may come at cost.
Items will be delivered to the shipping address provided. You (the Customer) will be responsible for providing the delivery address. Please check it and be aware that some autofill data from your device may miss key data. Items missing as a result of providing an incorrect delivery address will be the customers responsibility.
*Free Delivery is mainland UK and excludes Shetland Islands (ZE), Outer Hebrides (HS) and Isle of Man (IM), to which there is a surcharge
**we reserve the right to change couriers specified, but will always keep to a equivalent speed service.
