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Home > Products > Rear Sprocket > RAL > SUPERSPROX ALUMINUM REAR SPROCKET RAL-1489:39-GRN


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Product Extra Information

Material Aluminium
Chain 525
Teeth 39
Color GRN
Inner diameter (ID) 80
Pitch circle diameter (PCD) 104
Bolt hole 10.5
Type RAL
Product Application
ModelFrom yearTo Year
900 Z (ABS) (ZR900 AHF,AJF,AKF,DJF)20172024
All bikes with 525 chain20042011
Carrozzeria wheels in 525 chain (80.11 mm bore, 6 bolts)00
KLZ1000 Versys (SE) (ABS LT (SE))20122024
Z 1000 (ZR 1000 A1-A3)20032006
Z 1000 (ZR1000 C7F,C8F,C9F) ABS20072009
Z 1000 (ZR1000 DAF,DBF,DCF,DDF,DDFA)20102014
Z 1000 (ZR1000 EBF,ECF,EDF,EDFA) ABS20112013
Z 1000 (ZR1000 GEFA,GFF,GGF,HHF,HJF,HKF,HLF) ABS20152024
Z 1000 (ZR1000) Black Edition20122012
Z 1000 (ZR1000) GEFA,GFF,GGF,HHF,HJF ABS20142024
Z 1000 H2 (ZR1000 KLF-A-B)20202024
Z 1000 R (ZR1000 JHF,JJF,JKF,JLF)20172024
Z 1000 Special Edition20142015
Z 1000 Special Edition20132013
Z 1000 SX CIty / ABS / TOURER (ZR 1000 GBF, GCF)20112024
Z1000 (ZR1000 DAF,DBF,DCF,DDF,DDFA) ABS20102014
Z900 ABS (ZR900 BHF,BJF,BKF)20172024
Z900 RS Cafe (ZR900 CJF,CKF,CJFA,CJFB,CKF,CKFB)20172024
ZX 10 R20042005
ZX 10 R20062007
ZX 10R NINJA20082010
ZX 10R NINJA20162024
ZX 10R NINJA20112015
ZX 10R NINJA20062007
ZX 10R NINJA20042005
ZX 10RR NINJA20172024
ZX-636 (A1P)20022002
ZX-6R (ZX 600 G1-G2) NINJA19982002
ZX-6R (ZX636 EDF,EEF,EFF,EGF,EHF,EJF) Ninja20132018
ZX-7R (ZX 750 P1-P6) NINJA19962003
ZX-7RR (ZX750 N1-N2) NINJA19961999
ZX-9R (ZX900 F1-F2) Ninja20022004
ZX1000 Ninja20112024

Select option below to choose diffent teeth and color

Out of stock

Each order from 220PLN value of goods, indlude free shipping inside Poland. If order total is less then 220PLN, shipping cost will be calculated.


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Available in colors


Check your bike model for availabe color. More color options in Custom sprocket Section

Category Description

Why Supersprox Aluminium

  • CNC machines for an exact fit
  • Made from 7075-T6 aluminum for hight strenght and light weight.
  • Special tooth design increases chain contact and significantly extends the sprocket life.
  • Grooved teeth maximize sprocket life by preventing dirt duild-up.
  • Finished with a durable anodising in multiple colors.
  • 20% stronger design then any other aluminum sprocket on the market.


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FAQ: Frequently asked questions

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Return policy

Unused items in saleable condition purchased from our eShop may be returned within 30 days of the purchase date for a credit to the card on which they were originally purchased. Returned goods will only be accepted with prior authorization. For more detailed return policy click here.

I received a damaged product

If the sprocket you purchased is damaged please make images and send to us by email and one of our representative will connect with you within 48h.


Exchange of the sprocket is possible only if the sprocket is not used and purchased from our eshop directly. Return sprocket will be fully refunded (excluding shipping) and a new order for the exchange sprocket has to be placed on our eshop.

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    Shipping methods

    Each order from 220PLN value of goods, indlude free shipping inside Poland. If order total is less then 220PLN, shipping cost will be calculated.

    Gear Ratio


    Gear ratio explained. The gear ratio, is the ratio of turns made by one gear, compared to the other gear, when the gears are connected by a chain. An example of gear ratio will be with one gear of 10 teeth and the second gear of 20 teeth, giving a ratio of 2 (20/10=2). To calculate the ratio, devide the number of teeth on the rear sprocket, by the number of teeth on the front sprocket and the resulting number is your gear ratio. Why do you need to know your gear ratio? It might be, that your bike is not performing as you would like and a change in gear ratio might help the performace.

    GEAR DOWN. An example of this would be, that the bike is difficult to start in first gear and the clutch needs to be used more than you would like. You have plenty of top end speed, but need more slow speed control. The answer, might be to GEAR DOWN the bike. You can do this by adding more teeth to the rear sprocket or reducing the number of teeth on the front sprocket.

    GEAR UP. The opposite situation, might be that the bike has lots of power, but is reaching the rev limiter in top gear and you would like to reduce the revolutions at a particular speed. To do this, you would need to GEAR UP the bike. By reducing the number of teeth on the rear sprocket or increase the number of teeth on the front sprocket. Diameter of gear. Each tooth added or taken away from a sprocket, will reduce the diameter of the sprocket by a given amount. For simplicity, you can think about 5mm change on the diameter, for each additional or reduced tooth. This will help understanding in relation to space requirements for gear ratio changes.

    Chain length. The addition of teeth to the sprocket, may require a longer chain or changing the position of the rear wheel, by moving that backwards or forwards. It will depend on the addition or subtraction of sprocket teeth. This can be calculated by considering the chain pitch. For simplicity, you can think about each chain link requiring 16mm length (actually 520, 525, 530 chains require 15.875mm per link to be exact). But the chain is going around the rear sprocket and the front sprocket, so the important number would be the change in diameter of the sprocket and not the chain length. An example would be to remove one tooth from the rear sprocket. This would make the chain more loose and to correctly adjust the chain, you would need to move the rear wheel backwards (away from the small sprocket) by 5mm. This movement would compensate for the change in diameter. Due to chain construction, it is not possible to remove only one link and it is neccasary to remove even numbers of links (2, 4, 6, 8 etc).

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    Custom Product Teeth