Chain & Sprockets
- Tooth Count: 17
- Chain Pitch: 520
- Position: Countershaft (front)
- Material: Nickel-chrome-molybdenum alloy steel
- Style: Ultralight
- Finish: Natural
- Manufacturer Part Number: 500U-520-17P
Fitment
Year(s) — Make / Model — OEM Gearing — OEM Chain
| 2017–Present | Suzuki GSX-R1000 / GSX-R1000R | 17T / 45T | 525 |
Why Convert to 520
The 2017-and-later GSX-R1000 leaves the factory with 525-pitch chain — chosen by Suzuki for durability and longevity under street use. A 520 conversion replaces the chain and both sprockets with narrower, lighter components.
The real benefit is reduced rotating mass. A lighter chain and sprocket assembly means less weight spinning at the rear wheel with every acceleration and deceleration cycle. This is most noticeable for track riders and aggressive street riders — the bike responds more quickly to throttle inputs and feels lighter overall. For casual street commuters the difference is subtle and may not be physically felt.
The tradeoff is longevity. A 520 chain is working with less material than a 525 and will generally not outlast a stock-pitch setup under the same conditions. Riders who prioritize maximum chain life over rotating mass reduction are better served staying with the stock chain pitch.
The bottom line: 520 conversion is a meaningful upgrade for track use and performance-focused street riding. For everyday commuting and general street miles, the stock chain pitch is the more practical choice.
Gearing — Staying Stock or Making a Change
This sprocket matches the stock 17-tooth front — no gearing change beyond the 520 conversion itself.
If you are considering a gearing change in addition to the conversion, here is the general framework. Going one tooth smaller on the front (to 16T) shortens gearing — quicker acceleration, higher RPM at highway speeds, reduced top speed. The effect is roughly equivalent to adding two to three teeth to the rear sprocket. Going one tooth larger on the front (to 18T) lengthens gearing — lower cruise RPM, softer pull from a stop.
Stock gearing on these bikes is well matched for general street use. Neither direction is right or wrong — it depends on how and where you ride.
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IMPORTANT: Please Review Your Owner’s Manual for Exact Amounts or Sizing of This Product!
Speak to one of our experts today:
469-490-3577
Renthal
SKU:1212-1307
Description:Renthal 17-Tooth 520 Ultralight Front Sprocket
Product Overview
This is a Renthal 17-tooth 520-pitch Ultralight front sprocket for the 2017-and-later Suzuki GSX-R1000 and GSX-R1000R. The 2017+ GSX-R1000 runs a 17-tooth front stock with 525-pitch chain. This sprocket matches the stock tooth count — no gearing change — but requires replacing the chain and rear sprocket with 520-compatible components. Installing it keeps your bike at factory stock gearing.
Key Technology & Design
Renthal makes this sprocket from nickel-chrome-molybdenum alloy steel, CNC-machined rather than stamped for tighter dimensional tolerances and more consistent tooth geometry. The Ultralight design uses a computer-aided lightening pattern to reduce rotating mass while maintaining structural integrity. Natural finish.
Specs
- Tooth Count: 17
- Chain Pitch: 520
- Position: Countershaft (front)
- Material: Nickel-chrome-molybdenum alloy steel
- Style: Ultralight
- Finish: Natural
- Manufacturer Part Number: 500U-520-17P
Fitment
Year(s) — Make / Model — OEM Gearing — OEM Chain
| 2017–Present | Suzuki GSX-R1000 / GSX-R1000R | 17T / 45T | 525 |
Why Convert to 520
The 2017-and-later GSX-R1000 leaves the factory with 525-pitch chain — chosen by Suzuki for durability and longevity under street use. A 520 conversion replaces the chain and both sprockets with narrower, lighter components.
The real benefit is reduced rotating mass. A lighter chain and sprocket assembly means less weight spinning at the rear wheel with every acceleration and deceleration cycle. This is most noticeable for track riders and aggressive street riders — the bike responds more quickly to throttle inputs and feels lighter overall. For casual street commuters the difference is subtle and may not be physically felt.
The tradeoff is longevity. A 520 chain is working with less material than a 525 and will generally not outlast a stock-pitch setup under the same conditions. Riders who prioritize maximum chain life over rotating mass reduction are better served staying with the stock chain pitch.
The bottom line: 520 conversion is a meaningful upgrade for track use and performance-focused street riding. For everyday commuting and general street miles, the stock chain pitch is the more practical choice.
Gearing — Staying Stock or Making a Change
This sprocket matches the stock 17-tooth front — no gearing change beyond the 520 conversion itself.
If you are considering a gearing change in addition to the conversion, here is the general framework. Going one tooth smaller on the front (to 16T) shortens gearing — quicker acceleration, higher RPM at highway speeds, reduced top speed. The effect is roughly equivalent to adding two to three teeth to the rear sprocket. Going one tooth larger on the front (to 18T) lengthens gearing — lower cruise RPM, softer pull from a stop.
Stock gearing on these bikes is well matched for general street use. Neither direction is right or wrong — it depends on how and where you ride.
